Microsoft Sharepoint Products and Technologies Resource Kit eBook

Chapter 37: Using Visual Studio .NET to Create Web Parts 1017
You are now ready to step through your code.
To use a start-up page and automatically attach to the process
You can automatically attach to the W3wp.exe process for debugging purposes. This
method is probably the one you will use most often during Web Part development.
1. Right-click the project name in the Solution Explorer, and then click Properties.
2. Click Configuration Properties, and then click Debugging.
3. Under Start Action, set Debug Mode to URL and then set Start URL to the
URL of the Web Part Page that uses your Web Part.
4. Click OK, and then save your project.
5. On the Debug menu, click Start. The debugger should launch the browser
with your Web Part Page, attach to the process, and allow you to debug automatically.
After attaching to the W3wp.exe process, you are now ready to step through the
code. Request the Web Part Page with the target Web Part in it. As the Web Part Page
and the Web Part render, depending on where the breakpoint is set you will notice that
the control switches to the Visual Studio debugger. Once the control is in the debugger,
you can step through the code and identify the problem by using the debugger’s
available functionality.
Using the CallStack Attribute
Windows SharePoint Services overrides the CallStack attribute. This attribute is
located in the Web.config file. The CallStack attribute controls whether a call stack
and an exception message are displayed when a system-level exception occurs
while ASP.NET processes a request to send a page to all local and remote clients. By
default, Windows SharePoint Services disables the CallStack attribute and displays a
limited set of exceptions to prevent information disclosure.
To enable the CallStack attribute
To receive a call stack and an exception message when an exception occurs, enable
the CallStack attribute.
1. In Windows Explorer, browse to the root folder of the Windows SharePoint Services
extended virtual server, for example: local_drive:\InetPub\wwwroot\bin\.
2. Double-click the Web.config file.
3. In the Web.config file, search for the element.
4. In the element, locate the tag and change it to .
5. Save and close the file.