刚学NET，有个问题请教，关于DropDownList

jok127 2009-03-18 10:38:17

运行后，改变DropDownList 的值后，什么都没有发生。我是照着一本教材做的。不知道哪里错了呢？
////////////////////////////////////////////////////////////////
<form id="form1" runat="server">
<asp:DropDownList ID="DropDownList1" runat="server" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged" AutoPostBack="false">
<asp:ListItem Value="123">123</asp:ListItem>
<asp:ListItem Value="456">456</asp:ListItem>
<asp:ListItem Value="789">789</asp:ListItem>
<asp:ListItem Value="abc">abc</asp:ListItem>
</asp:DropDownList>
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
</form>

////////////////////////////////////////////////////////////
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)
{
if (!IsPostBack)
{
}
}

protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
TextBox1.Text = DropDownList1.SelectedItem.Value;
}

}

...全文

100 3 打赏收藏转发到动态举报

写回复

用AI写文章

3 条回复

切换为时间正序

请发表友善的回复…

发表回复

jok127 2009-03-19

打赏
举报

运行后，发现根本就没有提交表单的JS出来！！！！这到底是什么原因呢？

////////////////////////////////
<!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><title>无标题页</title></head>
<body>
<form name="form1" method="post" action="Default.aspx" id="form1">
<input type="hidden" name="__VIEWSTATE" id="__VIEWSTATE" value="/wEPDwUJNzkwMTcxMDkxD2QWAgIDD2QWAgIBDxBkZBYBZmRklScvSde3mOyoZ46+8DzOwp/bL4A=" />
<select name="DropDownList1" id="DropDownList1">
<option selected="selected" value="123">123</option>
<option value="456">456</option>
<option value="789">789</option>
<option value="abc">abc</option>
</select>
<input name="TextBox1" type="text" id="TextBox1" />
<input type="hidden" name="__EVENTVALIDATION" id="__EVENTVALIDATION" value="/wEWBgK4r7LFAQLnjdGcAwLVwaPcAgL7qdPADgKH1IjlCALs0bLrBk1Q2KL8bklvB2VTXT/U3iGWbb0W" /></form>
</body>
</html>

jok127 2009-03-19