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();
}
}
}
}
}
