Asp.net数据库操作类 c#_[Asp.Net教程]

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
namespace Mysqlserver
{
///

/// SqlServerDataBase 的摘要说明
///

public class SqlServerDataBase
{
private string strError = null;
private int intCount = 0;
public SqlServerDataBase()
{
//
// TOD 在此处添加构造函数逻辑
//
}
///

/// 公开方法DBConn，返回数据库连接
///

///
public SqlConnection DBconn()
{
string strConn = "Server=(local);Database=GlobalMeetings;Uid=sa;pwd=";
try
{
return new SqlConnection(strConn);
}
catch (Exception)
{
return null;
}
}
///

/// 公开属性ErrorMessage，返回错误信息
///

public string ErrorMessage
{
get
{
return strError;
}
}

///

/// 根据查询语句从数据库检索数据
///

/// 查询语句
/// 数据库连接
/// 有数据则返回DataSet对象，否则返回null
public DataSet Select(string SelectString, SqlConnection sqlConn)
{
strError = "";
SqlConnection conn;
if (sqlConn == null)
{
conn = DBconn();
}
else
{
conn = sqlConn;
}
try
{
//若数据库连接的当前状态是关闭的，则打开连接
if (conn.State == ConnectionState.Closed)
{
conn.Open();
}
SqlDataAdapter mySqlDataAdapter = new SqlDataAdapter();
SqlCommand selectCommand = new SqlCommand(SelectString, conn);
selectCommand.CommandType = CommandType.Text;
mySqlDataAdapter.SelectCommand = selectCommand;
DataSet myDS = new DataSet();
mySqlDataAdapter.Fill(myDS);
return myDS;
}
catch (Exception e)
{
strError = "数据检索失败：" + e.Message;
return null;
}
finally
{
if (conn.State != ConnectionState.Closed)
{
conn.Close();
}
}
}
///

/// 更新数据库
///

/// Update Sql语句
/// 数据库连接
/// 更新成功返回true
public bool Update(string UpdateString, SqlConnection SqlConn)
{
return udiDataBase(UpdateString, SqlConn);
}