Summary of WPF #31 - Validierung - INotifyDataErrorInfo

00:00:00 - 00:15:00

This video explains how to validate an input field in WPF using the INotifyDataErrorInfo interface. This allows you to check for errors and report them to the user.

• 00:00:00 This video demonstrates how to validate an input field in WPF using different methods and how to generate a corresponding error message. First, the user demonstrates how to bind a text box to a user name in an Updates application. When the user leaves the text box, the binding no longer works. Next, the user demonstrates how to validate an input field using exceptions and how to generate a corresponding error message. Finally, the user demonstrates how to create a helper function that will validate the input field using errors.
• 00:05:00 The video shows how to validate an input field using the INotifyDataErrorInfo class. First, a message is created and then the color member name is known. This process goes on like normal, but at the end we add a must have a placed property and say that the username must have a value. If the username does not have a value, we add the message with the user's name and a comma after it. Finally, we add must have a value to the center property and return the error. If the center property is not set, we add the error to the list of strings and return. Finally, we call the clear error method and celebrate errors.
• 00:10:00 In this video, the author discusses how to validate a WPF application. They explain that there are two ways to do this: using the validation helper and using the INotifyDataErrorInfo class. The author then goes on to explain how to use the property and the indexer.
• 00:15:00 This WPF video explains how to validate data using the INotifyDataErrorInfo interface. This allows you to check for errors and report them to the user.