<%@ Control Language="C#" AutoEventWireup="true" CodeFile="WebUserControl.ascx.cs" Inherits="WebUserControl" %>
<script type="text/javascript">
function Incrementer() {
var txtBox = document.getElementById('MainContent_TextBox1').value;
var i = parseInt(txtBox);
i = i + 1;
var v = i + "";
document.getElementById('MainContent_TextBox1').value = v;
return false;
}
function Decrementer() {
var txtBox = document.getElementById('MainContent_TextBox1').value;
var i = parseInt(txtBox);
i = i - 1;
var v = i + "";
document.getElementById('MainContent_TextBox1').value = v;
return false;
}
</script>
<asp:TextBox ID="TextBox1" runat="server" Text="0"></asp:TextBox><br />
<asp:Button ID="Button1" runat="server" Text="Up" OnClientClick="return Incrementer();"/>
<asp:Button ID="Button2" Text="Down" runat="server" OnClientClick="return Decrementer();"/>
Default.aspx如下: -
<%@ Page Title="Home Page" Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true"
CodeFile="Default.aspx.cs" Inherits="_Default" %>
<%@ Register Src="~/WebUserControl.ascx" TagName="IncrementerUserControl" TagPrefix="uc1" %>
<asp:Content ID="HeaderContent" runat="server" ContentPlaceHolderID="HeadContent">
</asp:Content>
<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">
<uc1:IncrementerUserControl ID="Incrementer1" runat="server"/>
</asp:Content>
当我将其添加到usercontrol中时,增量器功能现在不起作用。为什么?如果我在没有用户控制的情况下使用增量器和减量器,它可以正常工作。
答案 0 :(得分:5)
MainContent_TextBox1
是问题所在。当您在用户控件中包含TextBox时,由于runat=server
尝试使用:
document.getElementById('%=TextBox1.ClientID %')
请参阅:
http://jagregory.com/writings/how-to-use-clientids-in-javascript-without-the-ugliness/