Debugging and Interpreting Errors in the WPF Designer

The Windows Presentation Foundation (WPF) Designer for Visual Studio provides full debugging support for your WPF controls and applications. If errors occur, various tools and resources are available to interpret and correct the errors.

In This Section

• XAML Errors and Help
  Describes the Error List window and how to get help on XAML errors that appear in the WPF Designer.

• Error Message Reference for the WPF Designer
  Contains links to topics that describe XAML errors that appear in the WPF Designer.

• Debugging and Interpreting Errors Walkthroughs
  Contains links to topics that describe how to debug and interpret runtime errors in the WPF Designer.

• Loading of the visual designer was cancelled
  Describes the message that appears in the WPF Designer when you cancel loading a XAML file.

• The document root element is not supported by the visual designer
  Describes the message that appears in the WPF Designer when you open a XAML file without any visual objects.

• The document contains errors that must be fixed
  Describes the message that appears in the WPF Designer when a XAML file contains an error.

• An unhandled exception has occurred
  Describes the message that appears in the WPF Designer when a XAML file accesses code that contains an exception.

Reference

• XamlParseException
  Represents the exception class for parser-specific exceptions.

• ExceptionRoutedEventArgs
  Provides data for the Image and MediaElement failed events.

• DispatcherUnhandledException
  Occurs when code executing by way of the Dispatcher raises an exception which is not handled.

Related Sections

• Troubleshooting WPF Designer Load Failures
  Describes procedures for understanding unexpected behavior in your custom designer code.

• XAML
  Contains links to topics that describe how to use XAML markup to define your WPF controls and applications.

• XAML Namespace (x:) Language Features
  Contains links to topics that describe elements and attributes in the XAML namespace.

• WPF Namespace XAML Extensions
  Contains links to topics that describe XAML markup extensions.

• Error List Window
  Describes how errors, warnings, and messages are displayed in the Error List window.

• Exception Assistant
  Describes the Exception Assistant dialog box, which you can use to interpret runtime exceptions.

• Debugging in Visual Studio
  Contains links to topics that describe how to use Visual Studio to debug applications.

• Exception Handling (Debugging)
  Describes how to use the error handling features of Visual Studio to interpret runtime exceptions.

• Unhandled Application Exceptions Sample
  Describes how to handle the DispatcherUnhandledException event to process recoverable and unrecoverable unhandled application exceptions.