studentManager/student_search.aspx.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;
using System.Text.RegularExpressions;
using System.Data.SqlClient;
using Mysqlserver;


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

            ddl_Binding();

           
        }
      
     }


    protected void ddl_Binding()
    {
        SqlServerDataBase db = new SqlServerDataBase();
        SqlConnection conn = db.DBconn();
        string sql = "select * from class";
        DataSet ds = db.Select(sql, conn);

        if (ds.Tables[0].Rows.Count > 0)
        {
          
            DropDownList1.DataTextField = "className";
            DropDownList1.DataValueField = "classID";
            DropDownList1.DataSource = ds;
            DropDownList1.DataBind();
            ListItem item = new ListItem("全部","全部");

            DropDownList1.Items.Insert(0, item);
        }

    }


   


    protected void ddl_dispose_depart_SelectedIndexChanged(object sender, EventArgs e)
    {
      //  ddl_operation_type_binding(ddl_dispose_depart.SelectedValue.ToString().Trim());
    }