JavaScript into Asp Page
i am learning javascript client side scripting language and i am using js in ASP.. i dont know when i compile the code, it shows
COMPILATION ERROR:Compiler Error Message: CS1061: 'ASP.default_aspx' does not contain a definition for 'popup' and no extension method 'popup' accepting a first argument of type 'ASP.default_aspx' could be found (are you missing a using directive or an assembly reference?)
开发者_高级运维
here is my code :
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="WEB_test_app._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>Shuraat Web ki</title>
<script type ="text/javascript">
function popup()
{
alert("popup!!");
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Button ID="Button1" runat="server" Text="Button" OnClick ="popup()"/>
<script type ="text/javascript">
document.write("Abid");
</script>
</div>
</form>
</body>
</html>
You're confusing client-side and server-side events. The popup() function is written in Javascript and runs on the client, but OnClick is a server-side event, so its handler runs on the server and has to be written in the language of your page (C#). popup() has no meaning in that context.
You can use the ClientClick event in order to handle the button click client-side. Note that you probably should return false from the handler in order to avoid a postback to the server:
<asp:Button ID="Button1" runat="server" Text="Button"
OnClientClick ="popup(); return false;" />
You have to assign popup() to the event OnClientClick instead of Click like this:
<asp:Button ID="Button1" runat="server" Text="Button" OnClientClick ="popup()"/>
The reasoning behind your problem is that when the run-time saw OnClick it tried to attatch that event with a C#/VB.Net (Code-Behind) method (which obviously does not exist) and we solved that by attaching the event OnClientClick to your Javascript method.
OnClick - is click handler on server side. If you want to call javascript function, use OnClientClick.
加载中,请稍侯......
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