用Dataset操作数据源的 类 （总结）
using System;
using System.Data;
using System.Data.OleDb ;
namespace Tools
{
///
/// Summary description for DataBaseCls.
///
public class DataBaseCls
{
//与SQL Server的连接字符串设置
private string _connString;
private string _strSql;
private OleDbCommandBuilder CmdBuilder;
private DataSet ds = new DataSet();
private OleDbDataAdapter da;
public DataBaseCls(string connString)
{
this._connString=connString;
}
private OleDbConnection GetConn()
{
try
{
OleDbConnection Connection = new OleDbConnection(this._connString);
Connection.Open();
return Connection;
}
catch (Exception ex)
{
//MessageBox.Show(ex.Message,"数据库连接失败");
throw;
}
}
//根据输入的SQL语句检索数据库数据
public DataSet SelectDb(string strSql,string strTableName)
{
try
{
this._strSql = strSql;
this.da = new OleDbDataAdapter(this._strSql,this.GetConn());
this.ds.Clear();
this.da.Fill(ds,strTableName);
return ds;//返回填充了数据的DataSet，其中数据表以strTableName给出的字符串命名
}
catch (Exception ex)
{
//MessageBox.Show(ex.Message,"数据库操作失败");
throw;
}
}
//数据库数据更新(传DataSet和DataTable的对象)
public DataSet UpdateDs(DataSet changedDs,string tableName)
{
try
{
this.da = new OleDbDataAdapter(this._strSql,this.GetConn());
this.CmdBuilder = new OleDbCommandBuilder(da);
this.da.Update(changedDs,tableName);
changedDs.AcceptChanges();
return changedDs;//返回更新了的数据库表
}
catch (Exception ex)
{
//MessageBox.Show(ex.Message,"数据库更新失败");
throw;
}
}
}
}