在我的应用程序中，我有一个下拉列表和一个标签.... [英] in my application i have one dropdownlist and one label....
问题描述
嗨到每一个......
在我的应用程序中我有一个下拉列表和一个标签，给了一些值到下拉列表我的qustn是如果我选择一个列表项它将显示自动标签所以如何编写这个代码
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hi to every one ...
in my application i have one dropdownlist and one label , am given some values to the dropdownlist my qustn is if i select the one list item it will show the label autometically so how to write the code for this one
thanx in advance
推荐答案
在下拉列表中选择索引转换请求
将标签文本设置为selecteditem
In the dropdownlist selectedindexchangedevent
set the label text to selecteditem
Label1.Text=dropdownlist1.SelectedText.ToString()
更新：
为下拉列表添加AutoPostBack属性为true
Update:
Add AutoPostBack property to true for dropdown
下面是.aspx文件的代码
Below is code for .aspx file
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default2.aspx.cs" Inherits="Default2" %>
<!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>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:DropDownList runat="server" ID="DropDownList1" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged" AutoPostBack="true" >
<asp:ListItem>--SELECT--</asp:ListItem>
<asp:ListItem>Ford</asp:ListItem>
<asp:ListItem>Maruti</asp:ListItem>
<asp:ListItem>BMW</asp:ListItem>
</asp:DropDownList>
<asp:Label ID="Label1" runat="server" Visible="false"></asp:Label>
</div>
</form>
</body>
</html>
现在将下面的.cs文件放入DropDownList1_SelectedIndexChanged活动中
Now put following in .cs file in "DropDownList1_SelectedIndexChanged" Event
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 Default2 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
if (DropDownList1.SelectedIndex > 0)
{
Label1.Text = DropDownList1.SelectedItem.Text;
Label1.Visible = true;
}
else
Label1.Visible = false;
}
}
希望它能帮助你......如果它帮助然后忘了投票:)
干杯......
Hope it will help u... if it helped then dnt forget to vote :)
cheers...
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