C#中数据库操作

  /*******************************
* 功能：数据库操作相关
* 作者：FlashICP
* 时间：2005-7-22
* ******************************/
using System;
using System.Data;
using System.Data.SqlClient;
using System.Web;
namespace moban
{
public class data
{
protected static string con="server=[yourserver];database=[yourdata];user id=[your id];password=[youpassword]";
//数据库字符串
protected System.Data.SqlClient.SqlConnection DataConnection;
//数据库连接对象
protected System.Data.SqlClient.SqlDataAdapter DataAdapter;
//SqlDataAdapter对象
protected System.Data.SqlClient.SqlCommand DataCommand;
//SqlCommand对象
protected System.Data.SqlClient.SqlCommandBuilder DataComBuilder;
//SqlCommandBuilder对象
protected System.Data.DataSet DataSet;
//DataSet对象
protected System.Data.DataRow DataRow;
//DataRow对象
protected System.Data.SqlClient.SqlDataReader DataReader=null;
//构造函数
public data()
{
DataConnection=DataConn();

}
//连接数据库参数
public string Con
{

get{return con;}
set{con= value;}

}
//数据库连接参数
public SqlConnection DataConn()
{
DataConnection=new SqlConnection(Con);
return DataConnection;

}
//返回数据库连接对象
public SqlDataReader DataQuery(string Sql)
{
Sql=Sql.Replace("--","");
Sql=Sql.Replace(";","");
DataConnection=DataConn();
DataConnection.Open();
DataReader=null;
DataCommand=new SqlCommand(Sql,DataConnection);
DataReader=DataCommand.ExecuteReader();
DataCommand.Dispose();
return DataReader;
}
//返回DataSet
public virtual DataSet DataSetQuery(string Sql,string TableName)
{
DataConnection=DataConn();
DataAdapter=new SqlDataAdapter(Sql,DataConnection);
DataSet=new DataSet();
DataAdapter.Fill(DataSet,TableName);
DataAdapter.Dispose();
DataConnection.Close();
DataConnection.Dispose();
return DataSet;
}
//返回DataSet
public DataSet DataSetQuery(DataSet myds,string TableName,string Sql)
{
DataConnection=DataConn();
DataAdapter=new SqlDataAdapter(Sql,DataConnection);
DataAdapter.Fill(myds,TableName);
DataConnection.Close();
DataConnection.Dispose();
return DataSet;

}
//返回DataSet
public DataSet DataSetQuery(string Sql,string TableName,int StarIndex,int Count)
{
DataConnection=DataConn();
DataConnection.Open();
DataAdapter=new SqlDataAdapter(Sql,DataConnection);
DataSet=new DataSet();
DataAdapter.Fill(DataSet,StarIndex,Count,TableName);
DataConnection.Close();
DataConnection.Dispose();
return DataSet;
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