left2.ascx.cs

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using System;
using System.Data;
using System.Configuration;
using System.Collections;
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;

public partial class left2 : System.Web.UI.UserControl
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            string sql;
            sql = "select * from yqlj order by id desc";
            getdata(sql);
        }
    }
    private void getdata(string sql)
    {
        DataSet result = new DataSet();
        result = new Class1().hsggetdata(sql);
        if (result != null)
        {
            if (result.Tables[0].Rows.Count > 0)
            {
                DataGrid4.DataSource = result.Tables[0];
                DataGrid4.DataBind();
            }
            else
            {
                DataGrid4.DataSource = null;
                DataGrid4.DataBind();
            }
        }
    }
}