一个简单的数据库操作类

类代码

using System;
using System.Data;
using System.Data.SqlClient;

namespace exchange
{
 public class MyDataOp
 {
  private String StrSql;
  private String StrConn;
  private SqlConnection Conn;
  public MyDataOp(String ss)
  {
   StrSql = ss;
   StrConn = System.Configuration.ConfigurationSettings.AppSettings["ConnectionString"];
  }
 
  public SqlDataReader CreateReader()
  {
   Conn=new SqlConnection(StrConn);
   SqlCommand Comm=new SqlCommand(StrSql,Conn);
   Conn.Open();
   SqlDataReader MyReader = Comm.ExecuteReader();
   return MyReader;
  }
  public DataSet CreateDataSet()
  {
   Conn=new SqlConnection(StrConn);
   Conn.Open();
   SqlDataAdapter Adpt=new SqlDataAdapter(StrSql,Conn);
   DataSet Ds=new DataSet();
   Adpt.Fill(Ds);
   return Ds;
  }
  public SqlCommand ExecuteCommand()
  {
   Conn=new SqlConnection(StrConn);
   SqlCommand Comm=new SqlCommand(StrSql,Conn);
   Conn.Open();
   Comm.ExecuteNonQuery();
   return Comm;
  }
  public void Close()
  {
   Conn.Close();
  }
     }
}

基本用法

namespace exchange
{
 using System;
 using System.Web.UI;
 using System.Web.UI.WebControls;
 using System.Data;
 using System.Data.SqlClient;
 using System.Web;
 using System.Security.Cryptography;

 public class newjoin : System.Web.UI.UserControl
 {
  
  protected DataList newjoinlist;
  public newjoin()
  {
   this.Init += new System.EventHandler(Page_Init);
  }

  protected void Page_Load(object sender, System.EventArgs e)
  { 
   if(!IsPostBack)
   {
    LoadData();
   }
         }
  
  protected void LoadData()
  {
   String StrSql = "select top 10 id,left(corpname,13) as corpname from crop order by id desc";
   MyDataOp mdo = new MyDataOp(StrSql);
   DataSet ds = mdo.CreateDataSet();
   newjoinlist.DataSource =  ds.Tables[0].DefaultView;
   newjoinlist.DataBind();
   mdo.Close();
  }

  private void Page_Init(object sender, EventArgs e)
  {
   InitializeComponent();
  }
  private void InitializeComponent()
  {   
   this.Load += new System.EventHandler(this.Page_Load);
  }
 }
}

用起来挺方便的！

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