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T4模板生成代码。数据实体层与数据仓储层。备注

文件生成模板：TempleteManager.ttinclude

<#@ assembly name="System.Core"
#><#@ assembly name="System.Data.Linq"
#><#@ assembly name="EnvDTE"
#><#@ assembly name="System.Xml.Linq"
#><#@ import namespace="System.Collections.Generic"
#><#@ import namespace="System.IO"
#><#@ import namespace="System.Text"
#><#@ import namespace="Microsoft.VisualStudio.TextTemplating"
#><#+
// https://raw.github.com/damieng/DamienGKit
// http://damieng.com/blog/2009/11/06/multiple-outputs-from-t4-made-easy-revisited

// Manager class records the various blocks so it can split them up
class Manager {
    private class Block {
        public String Name;
        public int Start, Length;
        public bool IncludeInDefault;
    }

    private Block currentBlock;
    private readonly List<Block> files = new List<Block>();
    private readonly Block footer = new Block();
    private readonly Block header = new Block();
    private readonly ITextTemplatingEngineHost host;
    private readonly StringBuilder template;
    protected readonly List<String> generatedFileNames = new List<String>();

    public static Manager Create(ITextTemplatingEngineHost host, StringBuilder template) {
        return (host is IServiceProvider) ? new VSManager(host, template) : new Manager(host, template);
    }

    public void StartNewFile(String name) {
        if (name == null)
            throw new ArgumentNullException("name");
        CurrentBlock = new Block { Name = name };
    }

    public void StartFooter(bool includeInDefault = true) {
        CurrentBlock = footer;
        footer.IncludeInDefault = includeInDefault;
    }

    public void StartHeader(bool includeInDefault = true) {
        CurrentBlock = header;
        header.IncludeInDefault = includeInDefault;
    }

    public void EndBlock() {
        if (CurrentBlock == null)
            return;
        CurrentBlock.Length = template.Length - CurrentBlock.Start;
        if (CurrentBlock != header && CurrentBlock != footer)
            files.Add(CurrentBlock);
        currentBlock = null;
    }

    public virtual void Process(bool split, bool sync = true) {
        if (split) {
            EndBlock();
            String headerText = template.ToString(header.Start, header.Length);
            String footerText = template.ToString(footer.Start, footer.Length);
            String outputPath = Path.GetDirectoryName(host.TemplateFile);
            files.Reverse();
            if (!footer.IncludeInDefault)
                template.Remove(footer.Start, footer.Length);
            foreach(Block block in files) {
                String fileName = Path.Combine(outputPath, block.Name);
                String content = headerText + template.ToString(block.Start, block.Length) + footerText;
                generatedFileNames.Add(fileName);
                CreateFile(fileName, content);
                template.Remove(block.Start, block.Length);
            }
            if (!header.IncludeInDefault)
                template.Remove(header.Start, header.Length);
        }
    }

    protected virtual void CreateFile(String fileName, String content) {
        if (IsFileContentDifferent(fileName, content))
            File.WriteAllText(fileName, content);
    }

    public virtual String GetCustomToolNamespace(String fileName) {
        return null;
    }

    public virtual String DefaultProjectNamespace {
        get { return null; }
    }

    protected bool IsFileContentDifferent(String fileName, String newContent) {
        return !(File.Exists(fileName) && File.ReadAllText(fileName) == newContent);
    }

    private Manager(ITextTemplatingEngineHost host, StringBuilder template) {
        this.host = host;
        this.template = template;
    }

    private Block CurrentBlock {
        get { return currentBlock; }
        set {
            if (CurrentBlock != null)
                EndBlock();
            if (value != null)
                value.Start = template.Length;
            currentBlock = value;
        }
    }

    private class VSManager: Manager {
        private readonly EnvDTE.ProjectItem templateProjectItem;
        private readonly EnvDTE.DTE dte;
        private readonly Action<String> checkOutAction;
        private readonly Action<List<String>> projectSyncAction;

        public override String DefaultProjectNamespace {
            get {
                return templateProjectItem.ContainingProject.Properties.Item("DefaultNamespace").Value.ToString();
            }
        }

        public override String GetCustomToolNamespace(string fileName) {
            return dte.Solution.FindProjectItem(fileName).Properties.Item("CustomToolNamespace").Value.ToString();
        }

        public override void Process(bool split, bool sync) {
            if (templateProjectItem.ProjectItems == null)
                return;
            base.Process(split, sync);
            if (sync)
                projectSyncAction.EndInvoke(projectSyncAction.BeginInvoke(generatedFileNames, null, null));
        }

        protected override void CreateFile(String fileName, String content) {
            if (IsFileContentDifferent(fileName, content)) {
                CheckoutFileIfRequired(fileName);
                File.WriteAllText(fileName, content);
            }
        }

        internal VSManager(ITextTemplatingEngineHost host, StringBuilder template)
            : base(host, template) {
            var hostServiceProvider = (IServiceProvider)host;
            if (hostServiceProvider == null)
                throw new ArgumentNullException("Could not obtain IServiceProvider");
            dte = (EnvDTE.DTE) hostServiceProvider.GetService(typeof(EnvDTE.DTE));
            if (dte == null)
                throw new ArgumentNullException("Could not obtain DTE from host");
            templateProjectItem = dte.Solution.FindProjectItem(host.TemplateFile);
            checkOutAction = fileName => dte.SourceControl.CheckOutItem(fileName);
            projectSyncAction = keepFileNames => ProjectSync(templateProjectItem, keepFileNames);
        }

        private static void ProjectSync(EnvDTE.ProjectItem templateProjectItem, List<String> keepFileNames) {
            var keepFileNameSet = new HashSet<String>(keepFileNames);
            var projectFiles = new Dictionary<String, EnvDTE.ProjectItem>();
            var originalFilePrefix = Path.GetFileNameWithoutExtension(templateProjectItem.FileNames[0]) + ".";
            foreach (EnvDTE.ProjectItem projectItem in templateProjectItem.ProjectItems)
                projectFiles.Add(projectItem.FileNames[0], projectItem);

            // Remove unused items from the project
            foreach (var pair in projectFiles)
                if (!keepFileNames.Contains(pair.Key) && !(Path.GetFileNameWithoutExtension(pair.Key) + ".").StartsWith(originalFilePrefix))
                    pair.Value.Delete();

            // Add missing files to the project
            foreach(String fileName in keepFileNameSet)
                if (!projectFiles.ContainsKey(fileName))
                    templateProjectItem.ProjectItems.AddFromFile(fileName);
        }

        private void CheckoutFileIfRequired(String fileName) {
            var sc = dte.SourceControl;
            if (sc != null && sc.IsItemUnderSCC(fileName) && !sc.IsItemCheckedOut(fileName))
                checkOutAction.EndInvoke(checkOutAction.BeginInvoke(fileName, null, null));
        }
    }
} #>

　　数据库访问模板：TemplateDbhelper.ttinclude

<#@ assembly name="System.Core"#>
<#@ assembly name="System.Data.Linq"#>
<#@ assembly name="System.Data.DataSetExtensions.dll" #>
<#@ assembly name="System.Data.dll" #>
<#@ assembly name="System.Xml.dll" #>
<#@ import namespace="System" #>
<#@ import namespace="System.Xml" #>
<#@ import namespace="System.Linq" #>
<#@ import namespace="System.Data" #>
<#@ import namespace="System.Data.SqlClient" #>
<#@ import namespace="System.Collections.Generic" #>
<#@ import namespace="System.IO" #>

<#+
    public class DbHelper
    {
        public static List<DbTable> GetDbTableViews(string connectionString, string database,string tables = null)
        {
            string typeParam="";
            if (tables=="V*")
                typeParam=" type='V'";
           else if (tables=="U*")
                typeParam=" type='U'";
            else if(tables.IndexOf(",")>=0)
                typeParam=string.Format(" (type='U' or type='V') and obj.name in ('{0}')", tables.Replace(",", "','"));
           else if(tables.IndexOf("%")>=0){
               string[] tablenames=tables.Split(';');
               typeParam+=" (type='U' or type='V') and (";
               int index=0;
               foreach (string name in tablenames)
               {
                   if (!string.IsNullOrWhiteSpace(name)){
                       if(index!=0){typeParam+=" or ";}
                       typeParam+=" obj.name like '"+name+"'";
                       index++;
                   }
               }
               typeParam+=")";
           }
            else
                typeParam=" type='U' or type='V'";

            #region SQL
            string sql = string.Format(@"select obj.name tablename,schem.name schemname,(
                                        select  c.name+',' from {0}.sys.objects objs
                                        inner join {0}.sys.index_columns ic on objs.object_id=ic.object_id
                                        inner join {0}.sys.indexes i on i.index_id=ic.index_id and i.object_id=objs.object_id and i.is_primary_key=1
                                        inner join {0}.sys.all_columns  c on c.column_id=ic.column_id and c.object_id=objs.object_id
                                        where objs.object_id=obj.object_id
                                        FOR XML PATH('')
                                        ) primarykey,
                                        CAST
                                        (
                                            CASE 
                                            WHEN (SELECT COUNT(1) FROM {0}.sys.indexes WHERE object_id= obj.OBJECT_ID AND is_primary_key=1) >=1 THEN 1
                                            ELSE 0
                                            END 
                                            AS BIT) HasPrimaryKey   from {0}.sys.objects obj
                                            INNER JOIN {0}.sys.schemas schem ON obj.schema_id=schem.schema_id
                                        where  {1}
                                        order by obj.name", database,typeParam);
            #endregion
            DataTable dt = GetDataTable(connectionString, sql);
           List<DbTable> listdt=new List<DbTable>();
           foreach (DataRow row in dt.Rows)
           {
                DbTable dbt=new DbTable();
                dbt.TableName = row.Field<string>("tablename");
                dbt.SchemaName = row.Field<string>("schemname");
                dbt.HasPrimaryKey = row.Field<bool>("HasPrimaryKey");
                string pkstr=row.Field<string>("primarykey");
                if(pkstr!=null){
                    pkstr=pkstr.Substring(0,pkstr.Length-1);
                    List<string> listpk=pkstr.Split(',').ToList();
                    dbt.PrimaryKey=listpk.ToArray();
                }
                listdt.Add(dbt);
           }
           return listdt;
        }

        public static List<DbColumn> GetDbColumns(string connectionString, string database, string tableName, string schema = "dbo")
        {
            #region SQL
            string sql = string.Format(@"
                                    WITH indexCTE AS
                                    (
                                        SELECT 
                                        ic.column_id,
                                        ic.index_column_id,
                                        ic.object_id    
                                        FROM {0}.sys.indexes idx
                                        INNER JOIN {0}.sys.index_columns ic ON idx.index_id = ic.index_id AND idx.object_id = ic.object_id
                                        WHERE  idx.object_id =OBJECT_ID('{1}') AND idx.is_primary_key=1
                                    )
                                    select
                                    colm.column_id ColumnID,
                                    CAST(CASE WHEN indexCTE.column_id IS NULL THEN 0 ELSE 1 END AS BIT) IsPrimaryKey,
                                    colm.name ColumnName,
                                    systype.name ColumnType,
                                    colm.is_identity IsIdentity,
                                    colm.is_nullable IsNullable,
                                    cast(colm.max_length as int) ByteLength,
                                    (
                                        case 
                                            when systype.name='nvarchar' and colm.max_length>0 then colm.max_length/2 
                                            when systype.name='nchar' and colm.max_length>0 then colm.max_length/2
                                            when systype.name='ntext' and colm.max_length>0 then colm.max_length/2 
                                            else colm.max_length
                                        end
                                    ) CharLength,
                                    cast(colm.precision as int) Precision,
                                    cast(colm.scale as int) Scale,
                                    prop.value Remark
                                    from {0}.sys.columns colm
                                    inner join {0}.sys.types systype on colm.system_type_id=systype.system_type_id and colm.user_type_id=systype.user_type_id
                                    left join {0}.sys.extended_properties prop on colm.object_id=prop.major_id and colm.column_id=prop.minor_id
                                    LEFT JOIN indexCTE ON colm.column_id=indexCTE.column_id AND colm.object_id=indexCTE.object_id                                        
                                    where colm.object_id=OBJECT_ID('{1}')
                                    order by colm.column_id", database,string.Format("{0}.{1}.{2}", database, schema, tableName));
            #endregion
            DataTable dt = GetDataTable(connectionString, sql);
            return dt.Rows.Cast<DataRow>().Select(row => new DbColumn()
            {
                ColumnID = row.Field<int>("ColumnID"),
                IsPrimaryKey = row.Field<bool>("IsPrimaryKey"),
                ColumnName = row.Field<string>("ColumnName"),
                ColumnType = row.Field<string>("ColumnType"),
                IsIdentity = row.Field<bool>("IsIdentity"),
                IsNullable = row.Field<bool>("IsNullable"),
                ByteLength = row.Field<int>("ByteLength"),
                CharLength = row.Field<int>("CharLength"),
                Scale = row.Field<int>("Scale"),
                Remark = row["Remark"].ToString()
            }).ToList();
        }
        
        public static DataTable GetDataTable(string connectionString, string commandText)
        {
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                SqlCommand command = connection.CreateCommand();
                command.CommandText = commandText;
                SqlDataAdapter adapter = new SqlDataAdapter(command);

                DataTable dt = new DataTable();
                adapter.Fill(dt);

                return dt;
            }
        }

    }

    #region DbTable
    /// <summary>
    /// 表结构
    /// </summary>
    public sealed class DbTable
    {
        /// <summary>
        /// 表名称
        /// </summary>
        public string TableName { get; set; }
        /// <summary>
        /// 表的架构
        /// </summary>
        public string SchemaName { get; set; }
        /// <summary>
        /// 是否含有主键
        /// </summary>
        public bool HasPrimaryKey { get; set; }
        /// <summary>
        /// 主键数组
        /// </summary>
        public string[] PrimaryKey { get; set; }
    }
    #endregion

    #region DbColumn
    /// <summary>
    /// 表字段结构
    /// </summary>
    public sealed class DbColumn
    {
        /// <summary>
        /// 字段ID
        /// </summary>
        public int ColumnID { get; set; }

        /// <summary>
        /// 是否主键
        /// </summary>
        public bool IsPrimaryKey { get; set; }

        /// <summary>
        /// 字段名称
        /// </summary>
        public string ColumnName { get; set; }

        /// <summary>
        /// 字段类型
        /// </summary>
        public string ColumnType { get; set; }

        /// <summary>
        /// 数据库类型对应的C#类型
        /// </summary>
        public string CSharpType
        {
            get
            {
                return SqlServerDbTypeMap.MapCsharpType(ColumnType);
            }
        }
         /// <summary>
        /// 数据库类型对应的C#类型转换
        /// </summary>
        public string CSharpConvert
        {
            get
            {
                return SqlServerDbTypeMap.MapSqlConvert(ColumnType,IsNullable);
            }
        }
        /// <summary>
        /// 
        /// </summary>
        public Type CommonType
        {
            get
            {
                return SqlServerDbTypeMap.MapCommonType(ColumnType);
            }
        }
        public string SqlDbType_ColumnType
        { 
            get
            {
                return SqlServerDbTypeMap.MapSqlDbType_ColumnType(ColumnType);
            }
                
        }

        /// <summary>
        /// 字节长度
        /// </summary>
        public int ByteLength { get; set; }

        /// <summary>
        /// 字符长度
        /// </summary>
        public int CharLength { get; set; }

        /// <summary>
        /// 小数位
        /// </summary>
        public int Scale { get; set; }

        /// <summary>
        /// 是否自增列
        /// </summary>
        public bool IsIdentity { get; set; }

        /// <summary>
        /// 是否允许空
        /// </summary>
        public bool IsNullable { get; set; }

        /// <summary>
        /// 描述
        /// </summary>
        public string Remark { get; set; }
    }
    #endregion

    #region SqlServerDbTypeMap

    public class SqlServerDbTypeMap
    {
        public static string MapCsharpType(string dbtype)
        {
            if (string.IsNullOrEmpty(dbtype)) return dbtype;
            dbtype = dbtype.ToLower();
            string csharpType = "object";
            switch (dbtype)
            {
                case "bigint": csharpType = "long"; break;
                case "binary": csharpType = "byte[]"; break;
                case "bit": csharpType = "bool"; break;
                case "char": csharpType = "string"; break;
                case "date": csharpType = "DateTime"; break;
                case "datetime": csharpType = "DateTime"; break;
                case "datetime2": csharpType = "DateTime"; break;
                case "datetimeoffset": csharpType = "DateTimeOffset"; break;
                case "decimal": csharpType = "decimal"; break;
                case "float": csharpType = "double"; break;
                case "image": csharpType = "byte[]"; break;
                case "int": csharpType = "int"; break;
                case "money": csharpType = "decimal"; break;
                case "nchar": csharpType = "string"; break;
                case "ntext": csharpType = "string"; break;
                case "numeric": csharpType = "decimal"; break;
                case "nvarchar": csharpType = "string"; break;
                case "real": csharpType = "Single"; break;
                case "smalldatetime": csharpType = "DateTime"; break;
                case "smallint": csharpType = "short"; break;
                case "smallmoney": csharpType = "decimal"; break;
                case "sql_variant": csharpType = "object"; break;
                case "sysname": csharpType = "object"; break;
                case "text": csharpType = "string"; break;
                case "time": csharpType = "TimeSpan"; break;
                case "timestamp": csharpType = "byte[]"; break;
                case "tinyint": csharpType = "byte"; break;
                case "uniqueidentifier": csharpType = "Guid"; break;
                case "varbinary": csharpType = "byte[]"; break;
                case "varchar": csharpType = "string"; break;
                case "xml": csharpType = "string"; break;
                default: csharpType = "object"; break;
            }
            return csharpType;
        }
        public static string MapSqlConvert(string dbtype,bool IsNullable){
         if (string.IsNullOrEmpty(dbtype)) return dbtype;
            dbtype = dbtype.ToLower();
            string defaultConvert = "IsString";
            switch (dbtype)
            {
                case "bigint": defaultConvert =IsNullable?"IsLongNull": "IsLong"; break;
                case "binary": defaultConvert =IsNullable?"IsByteNull":"IsByte"; break;
                case "bit": defaultConvert =IsNullable?"IsBitNull": "IsBit"; break;
                case "char": defaultConvert = "IsString"; break;
                case "date": defaultConvert =IsNullable?"IsDateTimeNull": "IsDateTime"; break;
                case "datetime": defaultConvert =IsNullable?"IsDateTimeNull":  "IsDateTime"; break;
                case "datetime2": defaultConvert =IsNullable?"IsDateTimeNull": "IsDateTime"; break;
                case "datetimeoffset": defaultConvert = "DateTimeOffset"; break;
                case "decimal": defaultConvert =IsNullable?"IsDecimalNull": "IsDecimal"; break;
                case "float": defaultConvert =IsNullable?"IsDoubleNull": "IsDouble"; break;
                case "image":  defaultConvert =IsNullable?"IsByteNull": "IsByte"; break;
                case "int": defaultConvert =IsNullable?"IsIntNull": "IsInt"; break;
                case "money":defaultConvert =IsNullable?"IsDecimalNull":"IsDecimal"; break;
                case "nchar": defaultConvert = "IsString"; break;
                case "ntext": defaultConvert = "IsString"; break;
                case "numeric": defaultConvert =IsNullable?"IsDecimalNull": "IsDecimal"; break;
                case "nvarchar": defaultConvert = "IsString"; break;
                case "real": defaultConvert = "Single"; break;
                case "smalldatetime": defaultConvert =IsNullable?"IsDateTimeNull":"IsDateTime"; break;
                case "smallint": defaultConvert =IsNullable?"IsSmallIntNull": "IsSmallInt"; break;
                case "smallmoney":defaultConvert =IsNullable?"IsDecimalNull": "IsDecimal"; break;
                case "sql_variant": defaultConvert = "object"; break;
                case "sysname": defaultConvert = "object"; break;
                case "text": defaultConvert = "IsString"; break;
                case "time": defaultConvert =IsNullable?"IsTimeSpanNull": "IsTimeSpan"; break;
                case "timestamp": defaultConvert =IsNullable?"IsByteNull":"IsByte"; break;
                case "tinyint": defaultConvert =IsNullable?"IsByteNull": "IsByte"; break;
                case "uniqueidentifier": defaultConvert =IsNullable?"IsGuidNull": "IsGuid"; break;
                case "varbinary": defaultConvert =IsNullable?"IsByteNull": "IsByte"; break;
                case "varchar": defaultConvert = "IsString"; break;
                case "xml": defaultConvert = "IsString"; break;
                default: defaultConvert = "object"; break;
            }
            return defaultConvert;
        }   
        public static Type MapCommonType(string dbtype)
        {
            if (string.IsNullOrEmpty(dbtype)) return Type.Missing.GetType();
            dbtype = dbtype.ToLower();
            Type commonType = typeof(object);
            switch (dbtype)
            {
                case "bigint": commonType = typeof(long); break;
                case "binary": commonType = typeof(byte[]); break;
                case "bit": commonType = typeof(bool); break;
                case "char": commonType = typeof(string); break;
                case "date": commonType = typeof(DateTime); break;
                case "datetime": commonType = typeof(DateTime); break;
                case "datetime2": commonType = typeof(DateTime); break;
                case "datetimeoffset": commonType = typeof(DateTimeOffset); break;
                case "decimal": commonType = typeof(decimal); break;
                case "float": commonType = typeof(double); break;
                case "image": commonType = typeof(byte[]); break;
                case "int": commonType = typeof(int); break;
                case "money": commonType = typeof(decimal); break;
                case "nchar": commonType = typeof(string); break;
                case "ntext": commonType = typeof(string); break;
                case "numeric": commonType = typeof(decimal); break;
                case "nvarchar": commonType = typeof(string); break;
                case "real": commonType = typeof(Single); break;
                case "smalldatetime": commonType = typeof(DateTime); break;
                case "smallint": commonType = typeof(short); break;
                case "smallmoney": commonType = typeof(decimal); break;
                case "sql_variant": commonType = typeof(object); break;
                case "sysname": commonType = typeof(object); break;
                case "text": commonType = typeof(string); break;
                case "time": commonType = typeof(TimeSpan); break;
                case "timestamp": commonType = typeof(byte[]); break;
                case "tinyint": commonType = typeof(byte); break;
                case "uniqueidentifier": commonType = typeof(Guid); break;
                case "varbinary": commonType = typeof(byte[]); break;
                case "varchar": commonType = typeof(string); break;
                case "xml": commonType = typeof(string); break;
                default: commonType = typeof(object); break;
            }
            return commonType;
        }

        public static string MapSqlDbType_ColumnType(string dbtype)
        {
            if (string.IsNullOrEmpty(dbtype)) return "";
            dbtype = dbtype.ToLower();
            string commonType="";
            switch (dbtype)
            {
                 case "bigint": commonType = "BigInt"; break;
                case "binary": commonType = "Binary"; break;
                case "bit": commonType = "Bit"; break;
                case "char": commonType ="Char"; break;
                case "date": commonType ="Date"; break;
                case "datetime": commonType = "DateTime"; break;
                case "datetime2": commonType = "DateTime2"; break;
                case "datetimeoffset": commonType = "DateTimeOffset"; break;
                case "decimal": commonType ="Decimal"; break;
                case "float": commonType = "Float"; break;
                case "image": commonType = "Image"; break;
                case "int": commonType = "Int"; break;
                case "money": commonType ="Money"; break;
                case "nchar": commonType = "NChar"; break;
                case "ntext": commonType ="NText"; break;
                case "numeric": commonType = ""; break;
                case "nvarchar": commonType = "NVarChar"; break;
                case "real": commonType ="Real"; break;
                case "smalldatetime": commonType ="SmallDateTime"; break;
                case "smallint": commonType ="SmallInt"; break;
                case "smallmoney": commonType = "SmallMoney"; break;
                case "sql_variant": commonType = ""; break;
                case "sysname": commonType = ""; break;
                case "text": commonType = "Text"; break;
                case "time": commonType = "Time"; break;
                case "timestamp": commonType = "Timestamp"; break;
                case "tinyint": commonType ="TinyInt"; break;
                case "uniqueidentifier": commonType ="UniqueIdentifier"; break;
                case "varbinary": commonType ="VarBinary"; break;
                case "varchar": commonType = "VarChar"; break;
                case "xml": commonType ="Xml"; break;
                default: commonType =""; break;
            }
            return commonType;
        } 
    }
    #endregion
    

#>




<#+
    public class config
    {
        public static readonly string ViewConnectionString="Data Source=192.168.1.2;Initial Catalog=VIEW_ABS;User ID=sa;Password=123456;";
        public static readonly string ViewDbDatabase="VIEW_ABS";
         /// <summary>
        /// 全部表和视图： *
        /// 全部表：U*
        /// 全部视图： V*
        /// 部分表或视图精确匹配：table1,table2
        /// 部分表或视图模糊匹配（sql模糊查询规则）：%table1%;%table2%
        /// </summary>
        public static readonly string ViewDbTables=@"*";

        public static readonly string WFConnectionString="Data Source=192.168.1.2;Initial Catalog=WF_ABS;User ID=sa;Password=123456;";
        public static readonly string WFDbDatabase="WF_ABS";
        public static readonly string WFDbTables="*";
    }
#>

DB Code

实体生成模板：Model.tt

<#@ template debug="false" hostspecific="true" language="C#" #>
<#@ assembly name="System.Core" #>
<#@ assembly name="System.Configuration" #>
<#@ import namespace="System.Collections.Generic" #>
<#@ import namespace="System.Data.SqlClient" #>
<#@ import namespace="System.Data" #>
<#@ import namespace="System.Linq" #>

<#@include file="../../ABS.WF.Repository/TempleteManager.ttinclude"#> 
<#@ include file="../../ABS.WF.Repository/TemplateDbhelper.ttinclude"  #>
<# var manager = Manager.Create(Host, GenerationEnvironment); #>

<#        
    foreach(DbTable table in DbHelper.GetDbTableViews(MyConfig.ConStr,MyConfig.DbBaseStr,MyConfig.DbTableStr)){
        manager.StartNewFile(table.TableName+".cs");
#>
//------------------------------------------------------------------------------
// <auto-generated>
//     此代码已从模板生成。
//     手动更改此文件可能导致应用程序出现意外的行为。
//     如果重新生成代码，将覆盖对此文件的手动更改。
// </auto-generated>
//------------------------------------------------------------------------------
using System;
using System.Collections.Generic;
namespace ABS.WF.Model
{   
    /// <summary>
    /// 实体-<#=table.TableName#> 
    /// </summary>
    public partial class <#=table.TableName#>
    {
        <#
         PushIndent("        ");
        foreach(DbColumn column in DbHelper.GetDbColumns(MyConfig.ConStr, MyConfig.DbBaseStr, table.TableName,table.SchemaName)){
            WriteClassAttr(column);
        }
         PopIndent();
        #> 
    }
}
<#
        manager.EndBlock();    
    }            
#>
<# manager.Process(true); #>

<#+
    //生成类的行
    public void WriteClassAttr(DbColumn column){
        string CShareType=column.CSharpType;
        if(column.CommonType.IsValueType&& column.IsNullable){CShareType="Nullable<"+CShareType+">";}
        WriteLine("/// <summary>");
        WriteLine("/// "+column.Remark.Replace(Environment.NewLine, ""));
        WriteLine("/// </summary>");
        WriteLine("public " +  CShareType+" "+column.ColumnName + " { get; set; }");
    }
#>

<#+
    public class MyConfig
    {
        public static readonly string ConStr=config.WFConnectionString;
        public static readonly string DbBaseStr=config.WFDbDatabase;
        public static readonly string DbTableStr=config.WFDbTables;
    }
#>

数据访问模板：Repository.tt

<#@ template debug="false" hostspecific="true" language="C#" #>
<#@ assembly name="System.Core" #>
<#@ assembly name="System.Configuration" #>
<#@ import namespace="System.Collections.Generic" #>
<#@ import namespace="System.Data.SqlClient" #>
<#@ import namespace="System.Data" #>
<#@ import namespace="System.Linq" #>

<#@include file="../TempleteManager.ttinclude"#> 
<#@ include file="../TemplateDbhelper.ttinclude"  #>
<# var manager = Manager.Create(Host, GenerationEnvironment); #>


<#        
    foreach(DbTable table in DbHelper.GetDbTableViews(MyConfig.ConStr,MyConfig.DbBaseStr,MyConfig.DbTableStr)){
          manager.StartNewFile(table.TableName+"Repository.cs");
        string InsertStr,AllColumnStr, ModifyStr, AllAttrParam,ModifyAttrParam,PrimaryKeyParam,InsertReturnId;
        CommonSql(table,out InsertStr,out AllColumnStr,out ModifyStr,out AllAttrParam,out ModifyAttrParam,out PrimaryKeyParam,out InsertReturnId);
#>
//------------------------------------------------------------------------------
// <auto-generated>
//     此代码已从模板生成。
//     手动更改此文件可能导致应用程序出现意外的行为。
//     如果重新生成代码，将覆盖对此文件的手动更改。
// </auto-generated>
//------------------------------------------------------------------------------
using System;
using System.Collections.Generic;
using ABS.WF.Model;
using System.Data.SqlClient;
using ABS.WF.Repository.DBUtility;
using System.Data;
using ABS.WF.Core.IRepository;

namespace ABS.WF.Repository
{   
    public partial class <#=table.TableName#>Repository:I<#=table.TableName#>Repository
    {

        public int AddReturnId(<#=table.TableName#> model)
        {
            <#
            WriteLine(InsertReturnId);
            #>
            SqlParameter[] param = { <#=AllAttrParam#> };
            return Convert.ToInt32(SqlHelper.ExecuteScalar(SqlHelper.RwWfConnString, CommandType.Text, sql, param));
        }

        public int AddReturnId(<#=table.TableName#> model, SqlTransaction trans)
        {
            <#
            WriteLine(InsertReturnId);
            #>
            SqlParameter[] param = { <#=AllAttrParam#> };
            return Convert.ToInt32(SqlHelper.ExecuteScalar(trans, CommandType.Text, sql, param));
        }

        public int Add(<#=table.TableName#> model)
        {
            <#
            WriteLine(InsertStr);
            #>
            SqlParameter[] param = { <#=AllAttrParam#> };
            return SqlHelper.ExecuteNonQuery(SqlHelper.RwWfConnString, CommandType.Text, sql, param);
        }

        public int Add(<#=table.TableName#> model, SqlTransaction trans)
        {
            <#
            WriteLine(InsertStr);
            #>
            SqlParameter[] param = { <#=AllAttrParam#> };
            return SqlHelper.ExecuteNonQuery(trans, CommandType.Text, sql, param);
        }

        public int Modify(<#=table.TableName#> model)
        {
            string sql = "<#=ModifyStr#> where  <#=GetCondiByPK(table)#>";
            SqlParameter[] param = { <#=ModifyAttrParam#> };
            return SqlHelper.ExecuteNonQuery(SqlHelper.RwWfConnString, CommandType.Text, sql, param);
        }

        public int Modify(<#=table.TableName#> model, SqlTransaction trans)
        {
            string sql = "<#=ModifyStr#> where  <#=GetCondiByPK(table)#>";
            SqlParameter[] param = { <#=ModifyAttrParam#> };
            return SqlHelper.ExecuteNonQuery(trans, CommandType.Text, sql, param);
        }

        public int Delete(<#=table.TableName#> model)
        {
            string sql =  "delete <#=table.TableName#>  where <#=GetCondiByPK(table)#>";
            SqlParameter[] param = { <#=GetParamByPK(table)#> };
            return SqlHelper.ExecuteNonQuery(SqlHelper.RwWfConnString, CommandType.Text, sql, param);
        }


        public int Delete(int id)
        {
            string sql = "delete <#=table.TableName#>  where <#=GetCondiByPK(table,"id")#>";
            SqlParameter[] param = { <#=GetParamByPK(table,"id")#> };
            return SqlHelper.ExecuteNonQuery(SqlHelper.RwWfConnString, CommandType.Text, sql, param);
        }

        public int Delete(int id, SqlTransaction trans)
        {
            string sql = "delete <#=table.TableName#>  where <#=GetCondiByPK(table,"id")#>";
            SqlParameter[] param = { <#=GetParamByPK(table,"id")#> };
            return SqlHelper.ExecuteNonQuery(trans, CommandType.Text, sql, param);
        }
        /// <summary>
        /// 只读库读取数据
        /// </summary>
        public <#=table.TableName#> Get(int id)
        {
            string sql = "select <#=AllColumnStr#> from <#=table.TableName#> WITH(NOLOCK) where <#=GetCondiByPK(table,"id")#>";
            SqlParameter[] param = { <#=GetParamByPK(table,"id")#> };
            <#=table.TableName#> model = new <#=table.TableName#>();
            using (SqlDataReader reader = SqlHelper.ExecuteReader(SqlHelper.RoWfConnString, CommandType.Text, sql, param))
            {
                while (reader.Read())
                {
                    int i = 0;
                      <# ReadToModel(table);#>
                }
            }
            return model;
        }
        /// <summary>
        /// 读写库读取数据
        /// </summary>
        public <#=table.TableName#> GetRw(int id)
        {
            string sql = "select <#=AllColumnStr#> from <#=table.TableName#> where <#=GetCondiByPK(table,"id")#>";
            SqlParameter[] param = { <#=GetParamByPK(table,"id")#> };
            <#=table.TableName#> model = new <#=table.TableName#>();
            using (SqlDataReader reader = SqlHelper.ExecuteReader(SqlHelper.RwWfConnString, CommandType.Text, sql, param))
            {
                while (reader.Read())
                {
                    int i = 0;
                      <# ReadToModel(table);#>
                }
            }
            return model;
        }

        /// <summary>
        /// 带事物库读取数据
        /// </summary>
        /// <param name="id">主键</param>
        /// <param name="trans"></param>
        /// <returns></returns>
        public <#=table.TableName#> Get(int id, SqlTransaction trans)
        {
            string sql = "select <#=AllColumnStr#> from <#=table.TableName#> where <#=GetCondiByPK(table,"id")#>";
            SqlParameter[] param = { <#=GetParamByPK(table,"id")#> };
            <#=table.TableName#> model = new <#=table.TableName#>();
            using (SqlDataReader reader = SqlHelper.ExecuteReader(trans, CommandType.Text, sql, param))
            {
                while (reader.Read())
                {
                    int i = 0;
                      <# ReadToModel(table);#>
                }
            }
            return model;
        }
        
        /// <summary>
        /// 只读库读取数据
        /// </summary>
        public List<<#=table.TableName#>> GetAll()
        {
            string sql = "select <#=AllColumnStr#> from <#=table.TableName#> WITH(NOLOCK)";
            using (SqlDataReader reader = SqlHelper.ExecuteReader(SqlHelper.RoWfConnString, CommandType.Text, sql))
            {
                return SqlDataReaderToListObject(reader);
            }
        }
        
        /// <summary>
        /// 读写库读取数据
        /// </summary>
        public List<<#=table.TableName#>> GetAllRw()
        {
            string sql = "select <#=AllColumnStr#> from <#=table.TableName#>";
            using (SqlDataReader reader = SqlHelper.ExecuteReader(SqlHelper.RwWfConnString, CommandType.Text, sql))
            {
                return SqlDataReaderToListObject(reader);
            }
        }
        /// <summary>
        /// 只读库读取数据
        /// </summary>
        /// <param name="trans"></param>
        /// <param name="Condi">条件</param>
        /// <param name="param">参数</param>
        /// <returns></returns>
        public List<<#=table.TableName#>> GetAll(string Condi, params SqlParameter[] param)
        {
            string sql = "select <#=AllColumnStr#> from <#=table.TableName#> WITH(NOLOCK) "+Condi;
            using (SqlDataReader reader = SqlHelper.ExecuteReader(SqlHelper.RoWfConnString, CommandType.Text, sql,param))
            {
                return SqlDataReaderToListObject(reader);
            }
        }
        /// <summary>
        /// 读写库读取数据
        /// </summary>
        /// <param name="trans"></param>
        /// <param name="Condi">条件</param>
        /// <param name="param">参数</param>
        /// <returns></returns>
        public List<<#=table.TableName#>> GetAllRw(string Condi, params SqlParameter[] param)
        {
            string sql = "select <#=AllColumnStr#> from <#=table.TableName#> "+Condi;
            using (SqlDataReader reader = SqlHelper.ExecuteReader(SqlHelper.RwWfConnString, CommandType.Text, sql,param))
            {
                return SqlDataReaderToListObject(reader);
            }
        }
         /// <summary>
        /// 只读库读取数据 分页
        /// </summary>
        /// <param name="Condi">条件</param>
        /// <param name="order">排序字段</param>
        /// <param name="start">开始条数</param>
        /// <param name="limit">读取条数</param>
        /// <param name="param">参数</param>
        /// <returns></returns>
        public List<<#=table.TableName#>> GetAll(string Condi, string order, long start, long limit, out long count, params SqlParameter[] param)
        {
            string sqlData = "select * from(select <#=AllColumnStr#>,ROW_NUMBER()over(order by "+order+") ROW_NUMBERId from <#=table.TableName#> WITH(NOLOCK) "+Condi+") resultTemp where ROW_NUMBERId between "+start+" and "+ (start+limit) ;
            string sqlCount = "select COUNT(1) from <#=table.TableName#> WITH(NOLOCK) " + Condi;
            count = long.Parse(SqlHelper.ExecuteScalar(SqlHelper.RoWfConnString, CommandType.Text, sqlCount, param).ToString());
            using (SqlDataReader reader = SqlHelper.ExecuteReader(SqlHelper.RoWfConnString, CommandType.Text, sqlData, param))
            {
                return SqlDataReaderToListObject(reader);
            }
        }
        /// <summary>
        /// 读写库读取数据 分页
        /// </summary>
        /// <param name="Condi">条件</param>
        /// <param name="order">排序字段</param>
        /// <param name="start">开始条数</param>
        /// <param name="limit">读取条数</param>
        /// <param name="param">参数</param>
        /// <returns></returns>
        public List<<#=table.TableName#>> GetAllRw(string Condi, string order, long start, long limit, out long count, params SqlParameter[] param)
        {
            string sqlData = "select * from(select <#=AllColumnStr#>,ROW_NUMBER()over(order by "+order+") ROW_NUMBERId from <#=table.TableName#>"+Condi+") resultTemp where ROW_NUMBERId between "+start+" and "+ (start+limit) ;
            string sqlCount = "select COUNT(1) from <#=table.TableName#>" + Condi;
            count = long.Parse(SqlHelper.ExecuteScalar(SqlHelper.RwWfConnString, CommandType.Text, sqlCount, param).ToString());
            using (SqlDataReader reader = SqlHelper.ExecuteReader(SqlHelper.RwWfConnString, CommandType.Text, sqlData, param))
            {
                return SqlDataReaderToListObject(reader);
            }
        }
        /// <summary>
        /// 带事物库读取数据
        /// </summary>
       public List<<#=table.TableName#>> GetAll(SqlTransaction trans)
        {
            string sql = "select <#=AllColumnStr#> from <#=table.TableName#>";
            using (SqlDataReader reader = SqlHelper.ExecuteReader(trans, CommandType.Text, sql))
            {
                return SqlDataReaderToListObject(reader);
            }
        }

        /// <summary>
        /// 带事物库读取数据
        /// </summary>
        /// <param name="trans"></param>
        /// <param name="Condi">条件</param>
        /// <param name="param">参数</param>
        /// <returns></returns>
        public List<<#=table.TableName#>> GetAll(SqlTransaction trans,string Condi, params SqlParameter[] param)
        {
            string sql = "select <#=AllColumnStr#> from <#=table.TableName#> "+Condi;
            using (SqlDataReader reader = SqlHelper.ExecuteReader(trans, CommandType.Text, sql,param))
            {
                return SqlDataReaderToListObject(reader);
            }
        }

        /// <summary>
        /// sqlDataReader转成该类的集合
        /// </summary>
        /// <param name="reader"></param>
        /// <returns></returns>
        public static List<<#=table.TableName#>> SqlDataReaderToListObject(SqlDataReader reader)
        {
            List<<#=table.TableName#>> listresult = new List<<#=table.TableName#>>();
            while (reader.Read())
            {
                int i = 0;
                <#=table.TableName#> model = new <#=table.TableName#>();
                <# ReadToModel(table);#>
                listresult.Add(model);
            }
            return listresult;
        }
    }
}
<#
        manager.EndBlock();    
    }            
#>
<# manager.Process(true); #>

<#+
    /// <summary>
    /// 读取结果映射封装
    /// </summary>
    public void ReadToModel(DbTable table){
         PushIndent("                      ");
         foreach (DbColumn column in DbHelper.GetDbColumns(MyConfig.ConStr,MyConfig.DbBaseStr, table.TableName))
         {
              WriteLine("model."+column.ColumnName+" = DbLib."+column.CSharpConvert+"(reader,i++);");
         }
         PopIndent();
    }
    
    /// <summary>
    /// 根据主键进行操作的条件语句
    ///@table table
    ///@id 函数id名，不传自动获取所有id为条件
    /// </summary>
     public string GetCondiByPK(DbTable table,string id=null){
         string sqlcondi="";
         if (table.HasPrimaryKey)  //有主键
         {
             if (id==null)
             {
                 for (int i = 0; i < table.PrimaryKey.Length; i++)
                 {
                    string columnName=table.PrimaryKey[i];
                    sqlcondi+=columnName+"=@"+columnName;
                     if(i!=table.PrimaryKey.Length-1){
                         sqlcondi+=" and ";
                     }
                 }
             }else{
                 string columnName=table.PrimaryKey[0];
                 sqlcondi+=columnName+"=@"+columnName;
             }
         }
         return sqlcondi;
     }
     
        /// <summary>
        /// 根据主键进行操作的参数
        ///@table table
        ///@id 函数id名，不传自动获取所有id为条件
        /// </summary>
          public string GetParamByPK(DbTable table,string id=null){
         string param="";
         if (table.HasPrimaryKey)  //有主键
         {
             if (id==null)
             {
                 for (int i = 0; i < table.PrimaryKey.Length; i++)
                {
                    string columnName=table.PrimaryKey[i];
                    param+="new SqlParameter("@"+columnName+"", model."+columnName+")";
                    if(i!=table.PrimaryKey.Length-1){
                        param+=",";
                    }
                }
             }else{  //只根据id删除
                 string columnName=table.PrimaryKey[0];
                param+="new SqlParameter("@"+columnName+"","+id+")";
             }
         }
         return param;
     }

     public void CommonSql(DbTable table,out string InsertStr,out string AllColumnStr,out string ModifyStr,out string AllAttrParam,out string ModifyAttrParam,out string PrimaryKeyParam,out string InsertReturnId){
         string InsertColumunStr="";
         AllColumnStr="";
         string InsertValueStr="";
         ModifyStr="update "+table.TableName+" set ";
         AllAttrParam="";
         PrimaryKeyParam="";
         ModifyAttrParam="";
         foreach (DbColumn column in DbHelper.GetDbColumns(MyConfig.ConStr,MyConfig.DbBaseStr, table.TableName))
         {
             AllColumnStr+=column.ColumnName+",";
             //ModifyAttrParam+="new SqlParameter("@"+column.ColumnName+"", model."+column.ColumnName+"),";ColumnType
             ModifyAttrParam+="new SqlParameter("@"+column.ColumnName+"", SqlDbType."+column.SqlDbType_ColumnType+","+column.CharLength+") { Value = "+(column.IsNullable?"SqlHelper.SqlParamterNullValue(model."+column.ColumnName+")":"model."+column.ColumnName+"")+" },";
             if (!column.IsIdentity)
             {
                InsertColumunStr+=column.ColumnName+",";
                InsertValueStr+="@"+column.ColumnName+",";
                AllAttrParam+="new SqlParameter("@"+column.ColumnName+"", SqlDbType."+column.SqlDbType_ColumnType+","+column.CharLength+") { Value = "+(column.IsNullable?"SqlHelper.SqlParamterNullValue(model."+column.ColumnName+")":"model."+column.ColumnName+"")+" },";
             }
             if(column.IsPrimaryKey){
                 PrimaryKeyParam+="new SqlParameter("@"+column.ColumnName+"", SqlDbType."+column.SqlDbType_ColumnType+","+column.CharLength+") { Value = "+(column.IsNullable?"SqlHelper.SqlParamterNullValue(model."+column.ColumnName+")":"model."+column.ColumnName+"")+" },";
             }else{
                ModifyStr+=column.ColumnName+"=@"+column.ColumnName+",";
             }
         }
         InsertColumunStr=InsertColumunStr.Substring(0,InsertColumunStr.Length-1);
         AllColumnStr=AllColumnStr.Substring(0,AllColumnStr.Length-1);
         ModifyAttrParam=ModifyAttrParam.Substring(0,ModifyAttrParam.Length-1);
         InsertValueStr=InsertValueStr.Substring(0,InsertValueStr.Length-1);
         ModifyStr=ModifyStr.Substring(0,ModifyStr.Length-1);
         if(PrimaryKeyParam!="")
            PrimaryKeyParam=PrimaryKeyParam.Substring(0,PrimaryKeyParam.Length-1);
         AllAttrParam=AllAttrParam.Substring(0,AllAttrParam.Length-1);
         InsertStr="string sql="insert into "+table.TableName+"("+InsertColumunStr+") values("+InsertValueStr+")";";
         InsertReturnId="string sql="insert into "+table.TableName+"("+InsertColumunStr+") values("+InsertValueStr+");select @@IDENTITY AS ID";";
     }
#>
<#+
    public class MyConfig
    {
        public static readonly string ConStr=config.WFConnectionString;
        public static readonly string DbBaseStr=config.WFDbDatabase;
        public static readonly string DbTableStr=config.WFDbTables;
    }
#>

Repository Code

文件下载连接 http://download.csdn.net/download/drawdream/9916255

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原文地址：https://www.cnblogs.com/bluesummer/p/7262482.html

T4模板生成代码。 数据实体层与数据仓储层。备注

T4模板生成代码。数据实体层与数据仓储层。备注