default.aspx.cs

Visual C#2005程序设计教程

using System;
using System.Data;
using System.Configuration;
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 _Default : System.Web.UI.Page 
{
    protected void Page_Load(object sender, EventArgs e)
    {
        Label1.Text = "请选择班级";
        Button1.Text = "显示全部";
        Page.Title = "按班级查询学生成绩";

        //if (!IsPostBack)
        //{
            //DropDownList1.Items.Add("全部");
        //}
    }
    protected void Button1_Click(object sender, EventArgs e)
    {
       GridView1.DataSourceID = "AccessDataSource3";
    }
    
    
    protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
    {
        
            GridView1.DataSourceID = "AccessDataSource2";
        
    }
}