test.aspx.cs

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using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Data.SqlClient;
using System.Net;

public partial class test : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            Bind();
        }
    }

    private void Bind()
    {
        SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["conn"].ConnectionString);
        conn.Open();
        string cmdtext = "select subject,m_content,datetime from Message order by datetime desc";
        SqlDataAdapter sda = new SqlDataAdapter(cmdtext, conn);
        DataSet ds = new DataSet();
        sda.Fill(ds, "Message");
      //  GridView1.DataKeyNames = new string[] { "id" };
        this.GridView1.DataSource = ds.Tables[0].DefaultView;
        this.GridView1.DataBind();
        conn.Close();
    }


    #region 注释
    //public void Bind()
    //{
    //    SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["conn"].ConnectionString);
    //    conn.Open();
    //    string cmdtext = "select subject,m_content,datetime from Message order by m_datetime desc";
    //    SqlDataAdapter sda = new SqlDataAdapter(cmdtext, conn);
    //    DataSet ds = new DataSet();
    //    sda.Fill(ds, "Message");
    //    GridView1.DataKeyNames = new string[] { "id" };
    //    this.GridView1.DataSource = ds.Tables[0].DefaultView;
    //    this.GridView1.DataBind();
    //    conn.Close();
    //}
    //protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
    //{
    //    GridView1.PageIndex = e.NewPageIndex;
    //    Bind();
    //}
    //protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)