Asp.Net--DropDownList与DataTable数据绑定的方法(C#)[学习笔记]

页面代码

<% @ Page Language = " C# "  AutoEventWireup = " true "   CodeFile = " Default.aspx.cs "  Inherits = " _Default "   %>

DOCTYPE html PUBLIC  " -//W3C//DTD XHTML 1.0 Transitional//EN "   " http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd " >

< html xmlns = " http://www.w3.org/1999/xhtml "   >
< head runat = " server " >
     < title > 无标题页 title >
head >
< body >
     < form id = " form1 "  runat = " server " >
     < div >
         < asp:DropDownList ID = " DropDownList1 "  runat = " server "  Width = " 170px " >
         asp:DropDownList > div >
     form >
body >
html >

后台代码 

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

public   partial   class  _Default : System.Web.UI.Page 
... {
    protected void Page_Load(object sender, EventArgs e)
    ...{
        /**//*数据库连接*/
        SqlConnection conn = new SqlConnection("uid=用户名;pwd=用户密码;server=数据库IP地址;database=数据库名"");
        SqlCommand cmd = new SqlCommand("select * from Class",conn);
        /**//*建立数据适配器、数据表并填充*/
        SqlDataAdapter adpt = new SqlDataAdapter(cmd);
        DataTable dtable = new DataTable();
        adpt.Fill(dtable);
        /**//*与表的数据绑定*/
        DropDownList1.DataSource = dtable;//设置数据源
        DropDownList1.DataTextField = "ClassName";//设置所要读取的数据表里的列名
        DropDownList1.DataBind();//数据绑定
    }
}

填充后DataTable里的内容

DropDownList读取表格里的东西时候得记得用DropDownList1.DataTextField 设置要读取的列