安装codesmith以及创建模板

安装参考：https://www.cnblogs.com/xcsn/p/4529569.html

代码步骤：

1.批量生成模板BatchTest.cst

<%@ CodeTemplate Inherits="CodeTemplate" Language="C#" TargetLanguage="Text" Description="NetTiers main template." Debug="True" ResponseEncoding="UTF-8"%>

<%-- 注册实体层Entity模板 --%>
<%@ Register Name="EntityTemplate" Template="Model.cst" MergeProperties="Flase" ExcludeProperties=""%>
 
<%-- 添加引用 --%>
<%@ Import Namespace="System.Collections.Generic" %>
<%@ Import Namespace="System.Linq" %>

<%-- 添加引用dll --%>
<%@ Assembly Name="SchemaExplorer.SqlSchemaProvider" %>

<script runat="template">
public string OutputDirectory="";
</script>
<script runat="template">

    //生成实体Entity类
private void GenerateEntityClasses()
    {       
        try 
        {         
            //设置访问数据库地址
            var  SourceDatabase=new DatabaseSchema();
            SourceDatabase.Provider=new SchemaExplorer.SqlSchemaProvider();
            SourceDatabase.ConnectionString="Server=.;Initial Catalog=AAA;MultipleActiveResultSets=True;Max Pool Size=512;User Id=sa;Password=123456;";
            
            OutputDirectory =Environment.CurrentDirectory+"\"+"models\";//输出文件夹
            var mynamespace="WQB.Infrastructure.Data.Entity.DTO";//命名空间
            //表名
            var tables="TianBaoCallBack,TianbaoSynOrder";
            
            var dictables=tables.ToLower().Split(new string[]{","},StringSplitOptions.RemoveEmptyEntries).ToList();
            
            CodeTemplate Template =new EntityTemplate();
            foreach(TableSchema table in SourceDatabase.Tables)
            {
                if (dictables.Contains( table.Name.ToLower())==false){
                    continue;
                }
                Debug.WriteLine(table.Name);     
                string FileDirectory = OutputDirectory +"\"+ table.Name +".cs";
                //生成模板
                Template.SetProperty("SourceTable",table);
                Template.SetProperty("Namespace",mynamespace);
                //文件输出
                Template.RenderToFile(FileDirectory,true);
                Debug.WriteLine(FileDirectory +" 创建成功.");     
            }
            //
            System.Diagnostics.Process.Start("explorer.exe", OutputDirectory); 
        }
        catch(Exception e)
        {}
    }
</script>
<%
//创建实体层Entity类
this.GenerateEntityClasses();
Debug.WriteLine("OK");
%>

<%--输出提示--%>
生成成功！输出路径：<% Response.Write(OutputDirectory);  %> 

2.生成模板样例Model.cst

<%-- 
Name: Database Table Properties
Author: lwx
Description: Create a list of properties from a database table
--%>
<%@ CodeTemplate Language="C#" TargetLanguage="C#" Debug="False" Description="Create a list of properties from database table." %>
<%@ Property Name="SourceTable" Type="SchemaExplorer.TableSchema" Category="Context" Description="Table that the object is based on." %>
<%@ Map Name="CSharpAlias" Src="System-CSharpAlias" Description="System to C# Type Map" %>
<%@ Property Name="Namespace" Type="String" Category="Context" Description="Table that the object is based on." %>
<%@ Assembly Name="SchemaExplorer" %>
<%@ Assembly Name="System.Data" %>
<%@ Import Namespace="SchemaExplorer" %>
<%@ Import Namespace="System.Data" %>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using WQB.Infrastructure.Core;
using Chloe.Entity;

namespace <%=Namespace  %>
{
    /// <summary>
    /// 实体类：<%= GetClassName(SourceTable) %>/// </summary>
    [Table("<%= GetClassName(SourceTable) %>")]
    [Serializable]
    public class <%= GetClassName(SourceTable) %>_M
    {
        <% foreach (ColumnSchema column in SourceTable.Columns) { %>
        <% string dataType = GetCSharpVariableType(column);string lowerDataType=dataType.ToLower();%>
         <% string defaultVal="="";"; %>
        <% if (column.IsPrimaryKeyMember) {%>
        <% if (column.ExtendedProperties["CS_Default"].Value==""){ %>
        protected <%= GetPrimaryKeyType(SourceTable) %>  <%=GetMemberVariableName(column) %>;
        <%} else {%>
        protected <%= GetPrimaryKeyType(SourceTable) %>  <%=GetMemberVariableName(column) %>=<%=column.ExtendedProperties["CS_Default"].Value%>;
        <% } %>
        <%} else {%>        
        <% if (column.ExtendedProperties["CS_Default"].Value.ToString().TrimStart(new char[1]{'('}).TrimEnd(new char[1]{')'})=="''"){ %>
        <%if(lowerDataType=="string") defaultVal = "="";";  %>
        <%else if(lowerDataType.Contains("guid")) defaultVal = @"=Guid.NewGuid();"; %>
        <%else if(lowerDataType.Contains("datetime")) defaultVal = @";"; %>
        <%else if(lowerDataType.Contains("datetime")) defaultVal = @";"; %>       
        <%else defaultVal = @"="""";"; %>
        protected <%= GetCSharpVariableType(column)%> <%=GetMemberVariableName(column) %> <%=defaultVal%>
        <%} else if  (column.ExtendedProperties["CS_Default"].Value.ToString().TrimStart(new char[1]{'('}).TrimStart(new char[1]{'('}).TrimEnd(new char[1]{')'}).TrimEnd(new char[1]{')'})=="0"){%>
        <%if(lowerDataType=="string") defaultVal = @"=""0"";";  %>
        <%else if(lowerDataType.Contains("bool")) defaultVal = @"=false;"; %>
        <%else defaultVal=@"=0;"; %>
        protected <%= GetCSharpVariableType(column) %> <%=GetMemberVariableName(column) %> <%=defaultVal%>
        <%} else if  (column.ExtendedProperties["CS_Default"].Value.ToString().TrimStart(new char[1]{'('}).TrimStart(new char[1]{'('}).TrimEnd(new char[1]{')'}).TrimEnd(new char[1]{')'})=="1"){%>
        <%if(lowerDataType=="string") defaultVal = @"=""1"";";  %>
        <%else if(lowerDataType.Contains("bool")) defaultVal = @"=true;"; %>
        <%else defaultVal = @"=1;"; %>
        protected <%= GetCSharpVariableType(column) %> <%=GetMemberVariableName(column) %> <%=defaultVal%>
        <%} else if  (column.ExtendedProperties["CS_Default"].Value.ToString().TrimStart(new char[1]{'('}).TrimStart(new char[1]{'('}).TrimEnd(new char[1]{')'}).TrimEnd(new char[1]{')'})=="2"){%>
        <%if(lowerDataType=="string") defaultVal = @"=""2"";"; %>
        <%else defaultVal = @"=2;"; %>
        protected <%= GetCSharpVariableType(column) %> <%=GetMemberVariableName(column) %> <%=defaultVal%>
        <%} else if  (column.ExtendedProperties["CS_Default"].Value.ToString().TrimStart(new char[1]{'('}).TrimEnd(new char[1]{')'}).TrimEnd(new char[1]{')'}).TrimEnd(new char[1]{'('})=="getdate"){%>
          <%if(lowerDataType=="string") defaultVal = @"=DateTime.Now.ToString(""yyyy-MM-dd HH:mm:ss"");"; %>
        <%else defaultVal = @"=DateTime.Now;"; %>
        protected <%= GetCSharpVariableType(column) %><%if (lowerDataType=="datetime"&&column.Name.ToLower()!="addtime"&&column.Name.ToLower()!="modifytime"&&column.Name.ToLower()!="updatetime"){%>?<%}%>  <%=GetMemberVariableName(column) %><%if (defaultVal=="="";")%>;<%else%><%=defaultVal%>
         <%} else if  (column.ExtendedProperties["CS_Default"].Value.ToString().TrimStart(new char[1]{'('}).TrimEnd(new char[1]{')'}).TrimEnd(new char[1]{')'}).TrimEnd(new char[1]{'('})=="newid"){%>
          <%if(lowerDataType=="string") defaultVal = @"=Guid.NewGuid().ToString();"; %>
        <%else defaultVal = @"=Guid.NewGuid();"; %>
        protected <%= GetCSharpVariableType(column) %>  <%=GetMemberVariableName(column) %><%if (defaultVal=="="";")%>;<%else%><%=defaultVal%>
        <%} else {%>
        <% if (column.ExtendedProperties["CS_Default"].Value==""){ %>      
        <%switch(lowerDataType){ %>
        <% case "string":%>
        <% defaultVal = @"="""";"; %>
        <% break;%>
        <% case "datetime":%>
        <% if (column.Name.ToLower()=="addtime"||column.Name.ToLower()=="modifytime"||column.Name.ToLower()=="updatetime") {%>
        <% defaultVal = "=DateTime.Now;"; %>
        <%}%>
        <%else{%>            
        <%}%>
        <% break;%>
         <% case "short":%>
         <% case "short?":%>
         <% defaultVal = "=0;"; %>
         <% break;%>
         <% case "int":%>
         <% case "int?":%>
         <% defaultVal = "=0;"; %>
         <% break;%>
         <% case "long":%>
         <% case "long?":%>
         <% defaultVal = "=0;"; %>
         <% break;%>
         <% case "float":%>
         <% case "float?":%>
         <% defaultVal = "=0f;"; %>
         <% break;%>
         <% case "decimal":%>
         <% case "decimal?":%>
         <% defaultVal = "=0M;"; %>
         <% break;%>
         <% case "bool":%>
         <% case "bool?":%>
         <% defaultVal = "=false;"; %>
         <% break;%>
         <% case "byte":%>
         <% case "byte?":%>
         <% defaultVal = "=0;"; %>
         <% break;%>
         <% case "single":%>
         <% case "single?":%>
         <% defaultVal = "=0;"; %>
         <% break;%>
         <% default:%>        
         <%break;%>
         <%}%>      
        protected <%= dataType %><%if (lowerDataType=="datetime"&&column.Name.ToLower()!="addtime"&&column.Name.ToLower()!="modifytime"&&column.Name.ToLower()!="updatetime"){%>?<%}%>  <%=GetMemberVariableName(column) %>=null;
            <% } %>   
             <% else {%>
        protected <%= dataType %> <%=GetMemberVariableName(column) %><%if (defaultVal=="="";")%>;<%else%><%=column.ExtendedProperties["CS_Default"].Value%>
             <% }} %>
        <% }} %>
        public <%= GetClassName(SourceTable) %>_M()
        {
        }    
        public <%= GetClassName(SourceTable) %>_M(<%= GetPrimaryKeyType(SourceTable) %> id)
        {
            <%=GetMemberVariableName(SourceTable.PrimaryKey.MemberColumns[0]) %>=id;
        }    
        <% for (int i = 0; i < SourceTable.Columns.Count; i++) { %>
        /// <summary>
        /// <%= SourceTable.Columns[i].Description %>
        /// </summary>
        <% if (SourceTable.Columns[i].IsPrimaryKeyMember) {%>
        [Column(IsPrimaryKey = true)]
        <%} %>
        <% if ((bool)SourceTable.Columns[i].ExtendedProperties["CS_IsIdentity"].Value) {%>
        [AutoIncrement]
        <%} %>
        public <%= GetCSharpVariableType(SourceTable.Columns[i]) %><%if (GetCSharpVariableType(SourceTable.Columns[i]).ToLower()=="datetime"&&SourceTable.Columns[i].Name.ToLower()!="addtime"&&SourceTable.Columns[i].Name.ToLower()!="modifytime"&&SourceTable.Columns[i].Name.ToLower()!="updatetime"){%>?<%}%> <%= GetPropertyName(SourceTable.Columns[i]) %>
        {
            get {return <%= GetMemberVariableName(SourceTable.Columns[i]) %>;}
            set {<%= GetMemberVariableName(SourceTable.Columns[i]) %> = value;}
        }        
        <% if (i < SourceTable.NonPrimaryKeyColumns.Count - 1) Response.Write("
"); %>        
        <% } %>        
        public static <%= GetClassName(SourceTable) %>_M Get<%= GetClassName(SourceTable) %>(<%= GetPrimaryKeyType(SourceTable) %> id)
        {
            return new <%= GetClassName(SourceTable) %>_M(id);
        }
    }
}
<script runat="template">
public string GetMemberVariableDeclarationStatement(ColumnSchema column)
{
    return GetMemberVariableDeclarationStatement("protected", column);
}

public string GetMemberVariableDeclarationStatement(string protectionLevel, ColumnSchema column)
{
    string statement ="protected ";
    if(column.IsForeignKeyMember)
    {
        statement+=column.Name.Substring(0,column.Name.Length-2)+" "+column.Name.Substring(0,column.Name.Length-2)+"Id"; 
    }
    else
    {
        statement += GetCSharpVariableType(column) + " " + GetMemberVariableName(column);
    }
    string defaultValue = GetMemberVariableDefaultValue(column);
    if (defaultValue != "")
    {
        statement += " = " + defaultValue;
    }
    
    statement += ";";
    
    return statement;
}

public string GetReaderAssignmentStatement(ColumnSchema column, int index)
{
    string statement = "if (!reader.IsDBNull(" + index.ToString() + ")) ";
    statement += GetMemberVariableName(column) + " = ";
    
    if (column.Name.EndsWith("TypeCode")) statement += "(" + column.Name + ")";
    
    statement += "reader." + GetReaderMethod(column) + "(" + index.ToString() + ");";
    
    return statement;
}

public string GetCamelCaseName(string value)
{
    return value.Substring(0, 1).ToLower() + value.Substring(1);
}

public string GetMemberVariableName(ColumnSchema column)
{
    string propertyName = column.Name;
    //string memberVariableName =  GetCamelCaseName(propertyName);    
    //return memberVariableName;
    return "_"+propertyName.Substring(0,1).ToLower()+propertyName.Substring(1,propertyName.Length-1);
    
}

public string GetPropertyName(ColumnSchema column)
{
    string propertyName = column.Name;
    
    //if (propertyName == column.Table.Name + "Name") return "Name";
    //if (propertyName == column.Table.Name + "Description") return "Description";
    
    //if (propertyName.EndsWith("TypeCode"))
    //propertyName =propertyName.Substring(0, propertyName.Length - 4).ToUpper();//propertyName.Substring(0,1).ToUpper()+propertyName.Substring(1,propertyName.Length);  // 
    
    //return propertyName.Substring(0,1).ToUpper()+propertyName.Substring(1,propertyName.Length-1).ToLower();
    return propertyName;
    
}
        
public string GetMemberVariableDefaultValue(ColumnSchema column)
{
    switch (column.DataType)
    {
        case DbType.Guid:
        {
            return "Guid.Empty";
        }
        case DbType.AnsiString:
        case DbType.AnsiStringFixedLength:
        case DbType.String:
        case DbType.StringFixedLength:
        {
            return "String.Empty";
        }
        default:
        {
            return "";
        }
    }
}

public string GetCSharpVariableType(ColumnSchema column)
{
    if (column.Name.EndsWith("TypeCode")) return column.Name;
    
    switch (column.DataType)
    {
        case DbType.AnsiString: return "string";
        case DbType.AnsiStringFixedLength: return "string";
        case DbType.Binary: return "byte[]";
        case DbType.Boolean: return "bool";
        case DbType.Byte: return "byte";
        case DbType.Currency: return "decimal";
        case DbType.Date: return "DateTime";
        case DbType.DateTime: return "DateTime";
        case DbType.Decimal: return "decimal";
        case DbType.Double: return "double";
        case DbType.Guid: return "Guid";
        case DbType.Int16: return "short";
        case DbType.Int32: return "int";
        case DbType.Int64: return "long";
        case DbType.Object: return "object";
        case DbType.SByte: return "sbyte";
        case DbType.Single: return "float";
        case DbType.String: return "string";
        case DbType.StringFixedLength: return "string";
        case DbType.Time: return "TimeSpan";
        case DbType.UInt16: return "ushort";
        case DbType.UInt32: return "uint";
        case DbType.UInt64: return "ulong";
        case DbType.VarNumeric: return "decimal";
        default:
        {
            return "__UNKNOWN__" + column.NativeType;
        }
    }
}

public string GetReaderMethod(ColumnSchema column)
{
    switch (column.DataType)
    {
        case DbType.Byte:
        {
            return "GetByte";
        }
        case DbType.Int16:
        {
            return "GetInt16";
        }
        case DbType.Int32:
        {
            return "GetInt32";
        }
        case DbType.Int64:
        {
            return "GetInt64";
        }
        case DbType.AnsiStringFixedLength:
        case DbType.AnsiString:
        case DbType.String:
        case DbType.StringFixedLength:
        {
            return "GetString";
        }
        case DbType.Boolean:
        {
            return "GetBoolean";
        }
        case DbType.Guid:
        {
            return "GetGuid";
        }
        case DbType.Currency:
        case DbType.Decimal:
        {
            return "GetDecimal";
        }
        case DbType.DateTime:
        case DbType.Date:
        {
            return "GetDateTime";
        }
        case DbType.Binary:
        {
            return "GetBytes";
        }
        default:
        {
            return "__SQL__" + column.DataType;
        }
    }
}

public string GetClassName(TableSchema table)
{
    return table.Name;
}

public string GetSqlDbType(ColumnSchema column)
{
    switch (column.NativeType)
    {
        case "bigint": return "BigInt";
        case "binary": return "Binary";
        case "bit": return "Bit";
        case "char": return "Char";
        case "datetime": return "DateTime";
        case "decimal": return "Decimal";
        case "float": return "Float";
        case "image": return "Image";
        case "int": return "Int";
        case "money": return "Money";
        case "nchar": return "NChar";
        case "ntext": return "NText";
        case "numeric": return "Decimal";
        case "nvarchar": return "NVarChar";
        case "real": return "Real";
        case "smalldatetime": return "SmallDateTime";
        case "smallint": return "SmallInt";
        case "smallmoney": return "SmallMoney";
        case "sql_variant": return "Variant";
        case "sysname": return "NChar";
        case "text": return "Text";
        case "timestamp": return "Timestamp";
        case "tinyint": return "TinyInt";
        case "uniqueidentifier": return "UniqueIdentifier";
        case "varbinary": return "VarBinary";
        case "varchar": return "VarChar";
        default: return "__UNKNOWN__" + column.NativeType;
    }
}

public string GetPrimaryKeyType(TableSchema table)
{
    if (table.PrimaryKey != null)
    {
        return GetCSharpVariableType(table.PrimaryKey.MemberColumns[0]);
        
    }
    else
    {
        throw new ApplicationException("This template will only work on tables with a primary key.");
    }
}

public override string GetFileName()
{
    return this.GetClassName(this.SourceTable) + ".cs";
}

public string GetMemberVariableDefaultValue2(ColumnSchema column)
{
    switch (column.DataType)
    {
        case DbType.Guid:
        {
            return "Guid.Empty";
        }
        case DbType.AnsiString:
        case DbType.AnsiStringFixedLength:
        case DbType.String:
        case DbType.StringFixedLength:
        {
            return "String.Empty";
        }
        default:
        {
            return "";
        }
    }
}
</script>