using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.Data.SqlClient;
using System.IO;
using System.Reflection;
using System.Runtime.Serialization.Formatters.Binary;
using System.Xml;
namespace Test_DBUtility
{
/// <summary>
/// 数据库访问抽象基类 (基于MS-SQLServer2005或以上版本)
/// 此类为抽象类 abstract ，不允许实例化，在应用时直接调用即可
/// Autho ：zhouzhilong
/// version ：1.2
/// LastEditTime：2010-10-09
/// </summary>
public abstract class SqlHelper
{
//数据库连接字符串(web.config来配置)，可以动态更改connectionString支持多数据库.
public static readonly string LocalSqlServer = System.Configuration.ConfigurationManager.AppSettings["ConnectionString"].ToString();
#region ===========通用分页存储过程===========
/// <summary>
/// 通用分页存储过程
/// </summary>
/// <param name="connectionString">连接</param>
/// <param name="tblName">要显示的表或多个表的连接</param>
/// <param name="strGetFields"> 需要返回的列</param>
/// <param name="fldName">排序的字段名</param>
/// <param name="PageSize">页尺寸</param>
/// <param name="PageIndex">页码</param>
/// <param name="doCount">返回记录总数, 非 0 值则返回</param>
/// <param name="OrderType">1降序 ,0 升序，其他 多字段order 条件</param>
/// <param name="strWhere">查询条件 (注意: 不要加 WHERE)</param>
/// <returns>查询当前页的数据集</returns>
public static DataSet PageList(string connectionString, string tblName, string strGetFields, string fldName
, int PageSize, int PageIndex, int doCount, int OrderType, string strWhere)
{
SqlParameter[] parameters ={ new SqlParameter("@tblName",SqlDbType.NVarChar,255),
new SqlParameter("@strGetFields",SqlDbType.NVarChar,1000),
new SqlParameter("@fldName",SqlDbType.NVarChar,255),
new SqlParameter("@PageSize",SqlDbType.Int),
new SqlParameter("@PageIndex",SqlDbType.Int),
new SqlParameter("@doCount",SqlDbType.Bit),
new SqlParameter("@OrderType",SqlDbType.Int),
//new SqlParameter("@strWhere",SqlDbType.NVarChar,1500)};
new SqlParameter("@strWhere",SqlDbType.VarChar,8000)};
parameters[0].Value = tblName;
parameters[1].Value = (strGetFields == null) ? "*" : strGetFields;
parameters[2].Value = (fldName == null) ? "" : fldName;
parameters[3].Value = PageSize;
parameters[4].Value = PageIndex;
parameters[5].Value = doCount;
parameters[6].Value = OrderType;
parameters[7].Value = (strWhere == null) ? "" : strWhere;
DataSet ds = RunProcedureDS(connectionString, "PageList", parameters, "PageListTable");
return ds;
}
#endregion
#region ===========执行简单SQL语句============
/// <summary>
/// 获取表某个字段的最大值
/// </summary>
/// <param name="FieldName"></param>
/// <param name="TableName"></param>
/// <returns></returns>
public static int GetMaxID(string connectionString, string FieldName, string TableName)
{
string strSql = "select max(" + FieldName + ") from " + TableName;
DataSet ds = ExecuteDataSet(connectionString, strSql);
if (ds.Tables[0].Rows[0][0] != DBNull.Value)
{
return int.Parse(ds.Tables[0].Rows[0][0].ToString());
}
else
{
return 0;
}
}
/// <summary>
/// 检测一个记录是否存在(SqlParameter语句方式)
/// </summary>
/// <param name="strSql"></param>
/// <param name="cmdParms"></param>
/// <returns></returns>
public static bool ExistsRecord(string connectionString, string strSql, params SqlParameter[] cmdParms)
{
DataSet ds = RunProcedureDS(connectionString, strSql, cmdParms);
return int.Parse(ds.Tables[0].Rows[0][0].ToString()) > 0;
}
/// <summary>
///执行查询，并将查询返回的结果集中第一行的第一列作为 .NET Framework 数据类型返回。忽略额外的列或行。返回查询结果（object）。
/// </summary>
/// <param name="SQLString">计算查询结果语句</param>
/// <returns>查询结果（object）</returns>
public static object GetSingle(string connectionString, string SQLString)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
using (SqlCommand cmd = new SqlCommand(SQLString, connection))
{
try
{
connection.Open();
object obj = cmd.ExecuteScalar();
if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
{
return null;
}
else
{
return obj;
}
}
catch (System.Data.SqlClient.SqlException e)
{
connection.Close();
throw new Exception(e.Message);
}
}
}
}
#endregion 执行简单SQL语句
#region StrSQL执行结果，返回执行后受影响的行数
/*【公告】：ExecuteNonQuery()方法介绍
*对于 UPDATE、INSERT 和 DELETE 语句，
*返回值为该命令所影响的行数。对于所有其他类型的语句，
*返回值为 -1。如果发生回滚，返回值也为 -1。
*/
/// <summary>
/// 执行SQL语句，返回影响的记录数，select类型的语句此方法不可行。
/// 对于select方法应该通过Dataset.Tables[0].Rows.Count来判断
/// </summary>
/// <param name="SQLString">SQL语句</param>
/// <returns>影响的记录数</returns>
public static int ExecuteSql(string connectionString, string SQLString)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
using (SqlCommand cmd = new SqlCommand(SQLString, connection))
{
try
{
connection.Open();
int rows = cmd.ExecuteNonQuery();
return rows;
}
catch (System.Data.SqlClient.SqlException E)
{
connection.Close();
throw new Exception(E.Message);
}
}
}
}
/// <summary>
/// 方法重载，限定查询时间，返回影响的记录数
/// 客观的多并发查询时，可限制用户查询时间，以免对服务器增加负担
/// </summary>
/// <param name="Times">等待命令执行的时间，默认值为 30 秒。</param>
/// <returns>影响的记录数</returns>
public static int ExecuteSql(string connectionString, string SQLstring, int Times)
{
using (SqlConnection conntion = new SqlConnection(connectionString))
{
using (SqlCommand cmd = new SqlCommand(SQLstring, conntion))
{
try
{
conntion.Open();
cmd.CommandTimeout = Times;//默认值为 30 秒
int rows = cmd.ExecuteNonQuery();
return rows;
}
catch (System.Data.SqlClient.SqlException e)
{
conntion.Close();
throw e;
}
}
}
}
/// <summary>
/// 执行SQL语句，返回记录的条数【注意是记录数】；
/// 获取SQL字段第一行第一字段的数值，请不要用select
/// </summary>
/// <param name="SQLString">SQL语句</param>
/// <returns>影响的记录数</returns>
public static int ExecuteCountSql(string connectionString, string SQLString)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
using (SqlCommand cmd = new SqlCommand(SQLString, connection))
{
try
{
connection.Open();
SqlDataReader dr = cmd.ExecuteReader();
dr.Read();
int count = int.Parse(dr[0].ToString());
return count;
}
catch (System.Data.SqlClient.SqlException E)
{
connection.Close();
throw new Exception(E.Message);
}
}
}
}
/// <summary>
/// 执行带一个存储过程参数的的SQL语句。
/// </summary>
/// <param name="SQLString">SQL语句</param>
/// <param name="content">参数内容,比如一个字段是格式复杂的文章，有特殊符号，可以通过这个方式添加</param>
/// <returns>影响的记录数</returns>
public static int ExecuteSql(string connectionString, string SQLString, string content)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
SqlCommand cmd = new SqlCommand(SQLString, connection);
SqlParameter myParameter = new SqlParameter("@content", SqlDbType.NText);
myParameter.Value = content;
cmd.Parameters.Add(myParameter);
try
{
connection.Open();
int rows = cmd.ExecuteNonQuery();
return rows;
}
catch (SqlException E)
{
throw new Exception(E.Message);
}
finally
{
cmd.Dispose();
}
}
}
/// <summary>
/// 向数据库里插入图像格式的字段(和上面情况类似的另一种实例)
/// </summary>
/// <param name="strSQL">SQL语句</param>
/// <param name="fs">图像字节,数据库的字段类型为image的情况</param>
/// <returns>影响的记录数</returns>
public static int ExecuteSqlInsertImg(string connectionString, string strSQL, byte[] fs)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
SqlCommand cmd = new SqlCommand(strSQL, connection);
SqlParameter myParameter = new SqlParameter("@fs", SqlDbType.Image);
myParameter.Value = fs;
cmd.Parameters.Add(myParameter);
try
{
connection.Open();
int rows = cmd.ExecuteNonQuery();
return rows;
}
catch (SqlException E)
{
throw new Exception(E.Message);
}
finally
{
cmd.Dispose();
}
}
}
/// <summary>
/// 执行带参数的SQL语句，返回影响的记录数
/// </summary>
/// <param name="connectionString">连接字符串</param>
/// <param name="SQLString">SQL语句</param>
/// <param name="cmdParms">参数</param>
/// <returns>影响的记录数</returns>
public static int ExecuteSql(string connectionString, string SQLString, params SqlParameter[] cmdParms)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
using (SqlCommand cmd = new SqlCommand())
{
try
{
PrepareCommand(cmd, connection, null, SQLString, cmdParms);
int rows = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
return rows;
}
catch (System.Data.SqlClient.SqlException E)
{
connection.Close();
throw new Exception(E.Message);
}
}
}
}
/// <summary>
/// 执行存储过程，返回Return值【这个方法还没看明白，- - 】
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <param name="rowsAffected">影响的行数</param>
/// <returns></returns>
public static int RunProcedure(string connectionString, string storedProcName, IDataParameter[] parameters, out int rowsAffected)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
int result;
connection.Open();
SqlCommand command = BuildIntCommand(connection, storedProcName, parameters);
rowsAffected = command.ExecuteNonQuery();
result = (int)command.Parameters["ReturnValue"].Value;
connection.Close();
return result;
}
}
#endregion
#region ============获取DataReader============
/*【公告】下面的方法调用(先实例化一个dr)该方法后，
* 一定要对SqlDataReader进行Close (对实例化的dr进行 dr.Close();
* 如果不Close掉，则会保持read回话状态，加重数据库负荷) */
/// <summary>
/// 执行查询语句，返回SqlDataReader
/// </summary>
/// <param name="strSQL">查询语句</param>
/// <returns>SqlDataReader</returns>
public static SqlDataReader ExecuteReader(string connectionString, string strSQL)
{
SqlConnection connection = new SqlConnection(connectionString);
SqlCommand cmd = new SqlCommand(strSQL, connection);
try
{
connection.Open();
SqlDataReader myReader = cmd.ExecuteReader();
return myReader;
}
catch (System.Data.SqlClient.SqlException e)
{
throw new Exception(e.Message);
}
finally
{
connection.Close();
}
}
/// <summary>
/// 执行存储过程，返回SqlDataReader
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <returns>SqlDataReader</returns>
public static SqlDataReader RunProcedureDR(string connectionString, string storedProcName, IDataParameter[] parameters)
{
SqlConnection connection = new SqlConnection(connectionString);
SqlDataReader returnReader;
try
{
connection.Open();
SqlCommand command = BuildQueryCommand(connection, storedProcName, parameters);
command.CommandType = CommandType.StoredProcedure;
returnReader = command.ExecuteReader(CommandBehavior.CloseConnection);
}
catch (System.Data.SqlClient.SqlException e)
{
connection.Close();
throw new Exception(e.Message);
}
return returnReader;
}
#endregion
#region =============获取DataSet==============
/// <summary>
/// 执行查询语句，返回DataSet
/// </summary>
/// <param name="SQLString">查询语句</param>
/// <returns>DataSet</returns>
public static DataSet ExecuteDataSet(string connectionString, string SQLString)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
DataSet ds = new DataSet();
try
{
connection.Open();
SqlDataAdapter command = new SqlDataAdapter(SQLString, connection);
command.Fill(ds);
}
catch (SqlException ex)
{
connection.Close();
throw new Exception(ex.Message);
}
return ds;
}
}
public static DataSet ExecuteDataSet(string connectionString, string strSQL, int Times)
{
using (SqlConnection conntion = new SqlConnection(connectionString))
{
DataSet ds = new DataSet();
try
{
conntion.Open();
SqlDataAdapter da = new SqlDataAdapter(strSQL, conntion);
da.SelectCommand.CommandTimeout = Times;//限制查询时间
da.Fill(ds);
}
catch (System.Data.SqlClient.SqlException e)
{
conntion.Close();
throw new Exception(e.Message);
}
return ds;
}
}
/// <summary>
/// 执行查询语句，返回DataSet
/// </summary>
/// <param name="SQLString">查询语句</param>
/// <returns>DataSet</returns>
/// BU层得到对象实体用这个方法
public static DataSet ExecuteDataSet(string connectionString, string SQLString, params SqlParameter[] cmdParms)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
SqlCommand cmd = new SqlCommand();
PrepareCommand(cmd, connection, null, SQLString, cmdParms);
using (SqlDataAdapter da = new SqlDataAdapter(cmd))
{
DataSet ds = new DataSet();
try
{
da.Fill(ds);
cmd.Parameters.Clear();
}
catch (System.Data.SqlClient.SqlException ex)
{
throw new Exception(ex.Message);
}
return ds;
}
}
}
//【调用方法】：
//ArrayList arrayList = new ArrayList();
//arrayList.Add("strsql1");
//arrayList.Add("strsql2");
//...
//arrayList.Add("strsqln");
//return DbHelperSQL.ExecuteManySqlDS(arrayList);
/// <summary>
/// 执行多条SQL语句返回多个DataSet
/// </summary>
/// <param name="arrayList">arrayList对象集合</param>
/// <returns>多个数据集</returns>
public static DataSet ExecuteManySqlDS(string connectionString, ArrayList arrayList)
{
DataSet set = new DataSet();
using (SqlConnection connection = new SqlConnection(connectionString))
{
SqlCommand command = new SqlCommand();
command.Connection = connection;
string table = "table";
SqlDataAdapter adapter = new SqlDataAdapter();
for (int i = 0; i < arrayList.Count; ++i)
{
command.CommandText = arrayList[i].ToString();
adapter.SelectCommand = command;
adapter.Fill(set, table + i);// table + i 每个语句返回数据集的表名
}
return set;
}
}
/// <summary>
/// 执行存储过程返回DataSet
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <param name="tableName">DataSet结果中的表名</param>
/// <returns>DataSet</returns>
public static DataSet RunProcedureDS(string connectionString, string storedProcName, IDataParameter[] parameters)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
DataSet dataSet = new DataSet();
try
{
connection.Open();
SqlDataAdapter sqlDA = new SqlDataAdapter();
sqlDA.SelectCommand = BuildQueryCommand(connection, storedProcName, parameters);
sqlDA.Fill(dataSet);
}
catch (System.Data.SqlClient.SqlException e)
{
connection.Close();
throw new Exception(e.Message);
}
return dataSet;
}
}
public static DataSet RunProcedureDS(string connectionString, string storedProcName, IDataParameter[] parameters, string tableName)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
DataSet dataSet = new DataSet();
connection.Open();
SqlDataAdapter sqlDA = new SqlDataAdapter();
sqlDA.SelectCommand = BuildQueryCommand(connection, storedProcName, parameters);
sqlDA.Fill(dataSet, tableName);
connection.Close();
return dataSet;
}
}
#endregion
#region ============数据库事务处理============
/// <summary>
/// 执行多条SQL语句，实现数据库事务
/// </summary>
/// <param name="SQLStringList">多条SQL语句</param>
/// <returns>执行事务影响的行数</returns>
public static int ExecuteSqlTran(string connectionString, List<String> SQLStringList)
{
using (SqlConnection conntion = new SqlConnection(connectionString))
{
conntion.Open();
SqlCommand cmd = new SqlCommand();
cmd.Connection = conntion;
SqlTransaction ts = conntion.BeginTransaction();
cmd.Transaction = ts;
try
{
int count = 0;
for (int n = 0; n < SQLStringList.Count; n++)
{
string strsql = SQLStringList[n];
if (strsql.Length > 1)
{
cmd.CommandText = strsql;
count += cmd.ExecuteNonQuery();
}
}
ts.Commit();//提交数据库事务
return count;
}
catch
{
ts.Rollback();
return 0;
}
}
}
/// <summary>
/// 执行多条SQL语句，实现数据库事务
/// </summary>
/// <param name="SQLStringList">SQL语句的哈希表（key为sql语句，value是该语句的SqlParameter[]）</param>
public static void ExecuteSqlTran(string connectionString, Hashtable SQLStringList)
{
using (SqlConnection conn = new SqlConnection(connectionString))
{
conn.Open();
using (SqlTransaction trans = conn.BeginTransaction())
{
SqlCommand cmd = new SqlCommand();
try
{
//循环
foreach (DictionaryEntry myDY in SQLStringList)
{
string cmdText = myDY.Key.ToString();
SqlParameter[] parameter = (SqlParameter[])myDY.Value;
PrepareCommand(cmd, conn, trans, cmdText, parameter);
int result = cmd.ExecuteNonQuery(); //这里可以记录该事务的执行结果
cmd.Parameters.Clear();
}
trans.Commit();
}
catch
{
trans.Rollback();
throw;
}
}
}
}
#endregion
#region 创建 SqlCommand 对象及创建执行命令参数
/// <summary>
/// 为执行命令准备参数
/// </summary>
/// <param name="cmd">SqlCommand 命令</param>
/// <param name="conn">已经存在的数据库连接</param>
/// <param name="trans">数据库事物处理</param>
/// <param name="cmdText">SQL语句</param>
/// <param name="cmdparams">返回带参数的命令</param>
public static void PrepareCommand(SqlCommand cmd, SqlConnection conn, SqlTransaction trans, string cmdText, SqlParameter[] cmdparams)
{
if (conn.State != ConnectionState.Open)
{//判断数据库连接状态
conn.Open();
}
cmd.Connection = conn;
cmd.CommandText = cmdText;
if (trans != null)
{//判断是否需要事物处理
cmd.Transaction = trans;
}
cmd.CommandType = CommandType.Text;
if (cmdparams != null)
{
foreach (SqlParameter parameter in cmdparams)
{
if ((parameter.Direction == ParameterDirection.InputOutput || parameter.Direction == ParameterDirection.Input) && (parameter.Value == null))
{
parameter.Value = DBNull.Value;
}
cmd.Parameters.Add(parameter);
}
}
}
/// <summary>
/// 创建 SqlCommand 对象实例(用来返回一个整数值)
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <returns>SqlCommand 对象实例</returns>
private static SqlCommand BuildIntCommand(SqlConnection connection, string storedProcName, IDataParameter[] parameters)
{
SqlCommand command = BuildQueryCommand(connection, storedProcName, parameters);
command.Parameters.Add(new SqlParameter("ReturnValue",
SqlDbType.Int, 4, ParameterDirection.ReturnValue,
false, 0, 0, string.Empty, DataRowVersion.Default, null));
return command;
}
/// <summary>
/// 构建 SqlCommand 对象(用来返回一个结果集，而不是一个整数值)
/// </summary>
/// <param name="connection">数据库连接</param>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <returns>SqlCommand</returns>
private static SqlCommand BuildQueryCommand(SqlConnection connection, string storedProcName, IDataParameter[] parameters)
{
SqlCommand command = new SqlCommand(storedProcName, connection);
command.CommandType = CommandType.StoredProcedure;
foreach (SqlParameter parameter in parameters)
{
if (parameter != null)
{
// 检查未分配值的输出参数,将其分配以DBNull.Value.
if ((parameter.Direction == ParameterDirection.InputOutput || parameter.Direction == ParameterDirection.Input) &&
(parameter.Value == null))
{
parameter.Value = DBNull.Value;
}
command.Parameters.Add(parameter);
}
}
return command;
}
#endregion
#region ============构造语句常用类============
/// <summary>
/// Make input param.
/// </summary>
/// <param name="ParamName">Name of param.</param>
/// <param name="DbType">Param type.</param>
/// <param name="Size">Param size.</param>
/// <param name="Value">Param value.</param>
/// <returns>New parameter.</returns>
public static SqlParameter MakeInParam(string ParamName, SqlDbType DbType, int Size, object Value)
{
return MakeParam(ParamName, DbType, Size, ParameterDirection.Input, Value);
}
public static SqlParameter MakeInParam(string ParamName, SqlDbType DbType, object Value)
{
return MakeParam(ParamName, DbType, 0, ParameterDirection.Input, Value);
}
/// <summary>
/// Make input param.
/// </summary>
/// <param name="ParamName">Name of param.</param>
/// <param name="DbType">Param type.</param>
/// <param name="Size">Param size.</param>
/// <returns>New parameter.</returns>
public static SqlParameter MakeOutParam(string ParamName, SqlDbType DbType, int Size)
{
return MakeParam(ParamName, DbType, Size, ParameterDirection.Output, null);
}
/// <summary>
/// 构建存储过程参数
/// </summary>
/// <param name="ParamName">参数名</param>
/// <param name="DbType">参数类型(枚举)</param>
/// <param name="Size">参数大小</param>
/// <param name="Direction">DataSet 的参数类型(枚举)</param>
/// <param name="Value">设置该参数的数值</param>
/// <returns>New parameter.</returns>
public static SqlParameter MakeParam(string ParamName, SqlDbType DbType, Int32 Size, ParameterDirection Direction, object Value)
{
SqlParameter param;
if (Size > 0)
{
param = new SqlParameter(ParamName, DbType, Size);
}
else
{
param = new SqlParameter(ParamName, DbType);
}
param.Direction = Direction;
if (!(Direction == ParameterDirection.Output && Value == null))
{
param.Value = Value;
}
return param;
}
#endregion 构造语句常用类
#region =============由Object取值=============
/// <summary>
/// 取得Int值
/// </summary>
/// <param name="obj"></param>
/// <returns></returns>
public static int GetInt(object obj)
{
if (obj.ToString() != "")
return int.Parse(obj.ToString());
else
return 0;
}
/// <summary>
/// 获得Long值
/// </summary>
/// <param name="obj"></param>
/// <returns></returns>
public static long GetLong(object obj)
{
if (obj.ToString() != "")
return long.Parse(obj.ToString());
else
return 0;
}
/// <summary>
/// 取得Decimal值
/// </summary>
/// <param name="obj"></param>
/// <returns></returns>
public static decimal GetDecimal(object obj)
{
if (obj.ToString() != "")
return decimal.Parse(obj.ToString());
else
return 0;
}
/// <summary>
/// 取得Guid值
/// </summary>
/// <param name="obj"></param>
/// <returns></returns>
public static Guid GetGuid(object obj)
{
if (obj.ToString() != "")
return new Guid(obj.ToString());
else
return Guid.Empty;
}
/// <summary>
/// 取得DateTime值
/// </summary>
/// <param name="obj"></param>
/// <returns></returns>
public static DateTime GetDateTime(object obj)
{
if (obj.ToString() != "")
return DateTime.Parse(obj.ToString());
else
return DateTime.MinValue;
}
/// <summary>
/// 取得bool值
/// </summary>
/// <param name="obj"></param>
/// <returns></returns>
public static bool GetBool(object obj)
{
if (obj.ToString() == "1" || obj.ToString().ToLower() == "true")
return true;
else
return false;
}
/// <summary>
/// 取得byte[]
/// </summary>
/// <param name="obj"></param>
/// <returns></returns>
public static Byte[] GetByte(object obj)
{
if (obj.ToString() != "")
{
return (Byte[])obj;
}
else
return null;
}
/// <summary>
/// 取得string值
/// </summary>
/// <param name="obj"></param>
/// <returns></returns>
public static string GetString(object obj)
{
return obj.ToString();
}
#endregion
#region ===========序列化与反序列化===========
/// <summary>
/// 序列化对象
/// </summary>
/// <param name="obj">要序列化的对象</param>
/// <returns>返回二进制</returns>
public static byte[] SerializeModel(Object obj)
{
if (obj != null)
{
BinaryFormatter binaryFormatter = new BinaryFormatter();
MemoryStream ms = new MemoryStream();
byte[] b;
binaryFormatter.Serialize(ms, obj);
ms.Position = 0;
b = new Byte[ms.Length];
ms.Read(b, 0, b.Length);
ms.Close();
return b;
}
else
return new byte[0];
}
/// <summary>
/// 反序列化对象
/// </summary>
/// <param name="b">要反序列化的二进制</param>
/// <returns>返回对象</returns>
public static object DeserializeModel(byte[] b, object SampleModel)
{
if (b == null || b.Length == 0)
return SampleModel;
else
{
object result = new object();
BinaryFormatter binaryFormatter = new BinaryFormatter();
MemoryStream ms = new MemoryStream();
try
{
ms.Write(b, 0, b.Length);
ms.Position = 0;
result = binaryFormatter.Deserialize(ms);
ms.Close();
}
catch { }
return result;
}
}
#endregion
#region ==========Model与XML互相转换==========
/// <summary>
/// Model转化为XML的方法
/// </summary>
/// <param name="model">要转化的Model</param>
/// <returns></returns>
public static string ModelToXML(object model)
{
XmlDocument xmldoc = new XmlDocument();
XmlElement ModelNode = xmldoc.CreateElement("Model");
xmldoc.AppendChild(ModelNode);
if (model != null)
{
foreach (PropertyInfo property in model.GetType().GetProperties())
{
XmlElement attribute = xmldoc.CreateElement(property.Name);
if (property.GetValue(model, null) != null)
attribute.InnerText = property.GetValue(model, null).ToString();
else
attribute.InnerText = "[Null]";
ModelNode.AppendChild(attribute);
}
}
return xmldoc.OuterXml;
}
/// <summary>
/// XML转化为Model的方法
/// </summary>
/// <param name="xml">要转化的XML</param>
/// <param name="SampleModel">Model的实体示例，New一个出来即可</param>
/// <returns></returns>
public static object XMLToModel(string xml, object SampleModel)
{
if (string.IsNullOrEmpty(xml))
return SampleModel;
else
{
XmlDocument xmldoc = new XmlDocument();
xmldoc.LoadXml(xml);
XmlNodeList attributes = xmldoc.SelectSingleNode("Model").ChildNodes;
foreach (XmlNode node in attributes)
{
foreach (PropertyInfo property in SampleModel.GetType().GetProperties())
{
if (node.Name == property.Name)
{
if (node.InnerText != "[Null]")
{
if (property.PropertyType == typeof(System.Guid))
property.SetValue(SampleModel, new Guid(node.InnerText), null);
else
property.SetValue(SampleModel, Convert.ChangeType(node.InnerText, property.PropertyType), null);
}
else
property.SetValue(SampleModel, null, null);
}
}
}
return SampleModel;
}
}
#endregion
}
}