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Article ID: 315990 - Last Review: February 23, 2007 - Revision: 2.4
BUG: "Expected Identifier" Error Message on Default.aspx ASP.NET Page
This article was previously published under Q315990
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SYMPTOMS
When you browse to a WebForm that is named Default.aspx and was created with Microsoft Visual Studio .NET, you receive the following error message:
A Runtime Error has occurred.
Do you wish to Debug?
Line: 19
Error: Expected identifier
This error occurs when server controls that cause a PostBack are present in a WebForm that was created with the C# language.
CAUSE
The C# WebForm outputs illegal JavaScript to the client. The C# WebForm outputs an HTML form named "default" and then references that form with "document.default".
For example:
<form name="default" method="post" action="default.aspx" id="default">
<script language="javascript">
var theForm = document.default;
</script>
</form>
In JavaScript, "document.default" is an illegal usage of the keyword "default". Therefore, the browser displays a run-time error.
This illegal code is generated by any control that performs a PostBack.
RESOLUTION
To work around this problem, rename the form in the Default.aspx WebForm by following these steps:
- Open Default.aspx in Visual Studio .NET designer.
- Click the HTML tab to view the HTML code.
- Change the following HTML code
<form name="default" method="post" action="default.aspx" id="default">
<form name="defaultA" method="post" action="default.aspx" id="default">
STATUS
Microsoft has confirmed that this is a bug in the Microsoft products that are listed at the beginning of this article.
MORE INFORMATION
Steps to Reproduce the Problem
- Open Microsoft Visual Studio .NET.
- On the File menu, point to New, and then click Project.
- In the New Project dialog box, click Visual C# Projects under Project Type, and then click ASP.NET Web Application under Templates.
- In the Location text box, type the project name as TestApplication by replacing the default 'WebApplication#' name in the URL path.
- Add a LinkButton server control to WebForm1.aspx.
- On the File menu, click Save.
- On the Build menu, click Build Solution.
- In the Solution Explorer window, right-click WebForm1.aspx, and then click View in Browser.
APPLIES TO
- Microsoft ASP.NET 1.0
- Microsoft ASP.NET 1.1
- Microsoft Visual C# .NET 2002 Standard Edition
- Microsoft Visual C# .NET 2003 Standard Edition
| kbbug kbideproject kbnofix kbservercontrols kbwebforms KB315990 |
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