SqlDBHelper常用方法

/*=============================================================

*.net连接数据库常用方法

*Author ： dongny,Li

*E-mail ： xing.dong.li@163.com

*Edition： Beta 1.0

*=============================================================*/

using System;

using System.Collections.Generic;

using System.Text;

using System.Configuration;

using System.Data.SqlClient;

using System.Data;

namespace TreeViewHelper

{

public class SqlDBHelper

{

//在配置文件Web.Config中获取连接字符串

public static string connectionStr =ConfigurationManager.ConnectionStrings["connectionStr"].ConnectionString;

/// <summary>

/// 执行增删改T-SQL语句，返回执行成功与否

/// </summary>

/// <param name="strSql">T-SQL语句或存储过程名称</param>

/// <paramname="cmdType">T-SQL语句类别</param>

/// <param name="param">参数列表</param>

/// <returns>返回值为：true/false</returns>

public static bool DoExecuteNonQuery(string strSql, CommandType cmdType,params SqlParameter[] param)

{

using (SqlConnection con = new SqlConnection(connectionStr))

{

try

{

con.Open();

SqlCommand com = newSqlCommand(strSql, con);

com.CommandType = cmdType;

if (param.Length > 0)

com.Parameters.AddRange(param);

int flag =com.ExecuteNonQuery();

return flag > 0 ? true :false;

}

catch(Exception ex)

{

throw newException("SQL Connection Faile,Bring Error DoExecuteNonQuery :"+ex.Message);

}

finally

{

con.Close();

}

}

}

/// <summary>

/// 执行查询T-SQL语句，返回SqlDataReader对象

/// </summary>

/// <param name="strSql">T-SQL语句或存储过程</param>

/// <param name="cmdType">T-SQL语句类型</param>

/// <param name="param">参数列表</param>

/// <returns>SqlDataReader对象</returns>

public static SqlDataReader GetSqlDataReader(string strSql, CommandTypecmdType, params SqlParameter[] param)

{

SqlConnection con = new SqlConnection(connectionStr);

SqlDataReader sdr = null;

SqlCommand com = null;

try

{

con.Open();

com = new SqlCommand();

com.Connection = con;

com.CommandType = cmdType;

com.CommandText = strSql;

if (param.Length > 0)

com.Parameters.AddRange(param);

sdr =com.ExecuteReader(CommandBehavior.CloseConnection);

return sdr;

}

catch(Exception ex)

{

con.Close();

throw new Exception("SQLConnection Faile ,Bring Error GetSqlDataReader: " + ex.Message);

}

finally

{

com.Dispose();

}

}

/// <summary>

/// 执行查询T-SQL语句，返回DataSet

/// </summary>

/// <param name="strSql">T-SQL语句或存储过程</param>

/// <param name="cmdType">T-SQL语句类型</param>

/// <param name="param">参数列表</param>

/// <returns>DataSet对象</returns>

public static DataSet GetDataSet(string strSql, CommandType cmdType,params SqlParameter[] param)

{

using (SqlConnection con = new SqlConnection(connectionStr))

{

SqlDataAdapter sda = null;

try

{

con.Open();

SqlCommand com = newSqlCommand(strSql, con);

com.CommandType = cmdType;

com.Parameters.AddRange(param);

sda = newSqlDataAdapter(com);

DataSet ds = new DataSet();

sda.Fill(ds);

return ds;

}

catch(Exception ex)

{

throw newException("SQL Connection Faile ,Bring error GetDataSet: " +ex.Message);

}

finally

{

sda.Dispose();

con.Close();

}

}

}

/// <summary>

/// 执行查询T-SQL语句，返回DataTable

/// </summary>

/// <param name="strSql">T-SQL语句或存储过程</param>

/// <param name="cmdType">T-SQL语句类型</param>

/// <param name="param">参数列表</param>

/// <returns>DataTable对象</returns>

public static DataTable GetDataTable(string strSql, CommandType cmdType,params SqlParameter[] param)

{

using (SqlConnection con = new SqlConnection(connectionStr))

{

SqlDataAdapter sda = null;

try

{

con.Open();

SqlCommand com = newSqlCommand(strSql, con);

com.CommandType = cmdType;

com.Parameters.AddRange(param);

sda = newSqlDataAdapter(com);

DataTable dt = newDataTable();

sda.Fill(dt);

return dt;

}

catch(Exception ex)

{

throw newException("SQL Connection Faile ,Bring error GetDataTable: " +ex.Message);

}

finally

{

sda.Dispose();

con.Close();

}

}

}

/// <summary>

/// 执行查询T-SQL语句，返回单行记录

/// </summary>

/// <param name="strSql">T-SQL语句或存储过程</param>

/// <param name="cmdType">T-SQL语句类型</param>

/// <param name="param">参数列表</param>

/// <returns>返回Object对象</returns>

public static Object DoExecuteScalar(string strSql, CommandType cmdType,params SqlParameter[] param)

{

Object obj = null;

using (SqlConnection con = new SqlConnection(connectionStr))

{

SqlCommand com = newSqlCommand(strSql, con);

try

{

com.CommandType = cmdType;

com.Parameters.AddRange(param);

com.Connection.Open();

obj = com.ExecuteScalar();

return obj;

}

catch(Exception ex)

{

throw newException("SQL Connection Faile , Bring Error DoExecuteScalar: " +ex.Message);

}

finally

{

com.Dispose();

con.Close();

}

}

}

}

}