Wpf binding validation converter

Asked 9 years, 3 months ago. Active 9 years, 3 months ago. Viewed 1k times. Typed 'Text1' and changed focus. Debugger stepped into the converter and both validators resulting in two items in the ListView 1 error and 1 warning and a red border. The value converter wasn't even hit! Of course, the same red border. But the ListView has changed and shows only one warning. Improve this question.

It is probably related to stackoverflow. Errors raises CollectionChanged event while PropertyChanged triggers value converters — yuvin.

Add a comment. Sign in to vote. Tuesday, February 2, PM. Have you considered using a custom errortemplate instead? Marked as answer by martynball Wednesday, February 3, PM. Wednesday, February 3, PM. There's a bit of a trick to that approach.

Add err. Below is the code, however there seems to be a problem, not sure if i'm binding to the object wrong, see image: As you can see the error is simply being being displayed in the ListView but each letter is another Item Edited by martynball Tuesday, February 2, PM.

You only need to do anything with the error template if you don't like the default. But I thought that's what you want to do. My converter posted above produces a listbox of all the errors. Hope that helps.

Hmm, really can't get this working! For the complete example, see Bind Validation sample. Note that if you do not provide a custom ErrorTemplate the default error template appears to provide visual feedback to the user when there is a validation error. Also, WPF provides a built-in validation rule that catches exceptions that are thrown during the update of the binding source property.

For more information, see ExceptionValidationRule. Skip to main content. This browser is no longer supported.

Download Microsoft Edge More info. Is it possible to use DataAnnotations with xaml and if so, any chance of a short example code?

May Hello, Everyone thanks for your comment, i m looking forward to publish my new site which is on WCF it might help you please go through www. What goes where?!!??!? Nice web site, but you should add steps to know what to try first, second, Commented on 2. July Excellent Article. Got it working easily. Helped me alot! September How will you stop user from going to next page till user clears all validations on this page?

Just like it used to happen in aspx pages. As soon as user will click submit button, all client side validators will validate and of any of them fails then user remains on the same page.

Please help October I have a little problem in this validation process. I don't wan't to show user the validation errors red border on controls before they try to save the form. Is there any way I can disable this validation errors on controls till user tries to submit the form? Using StringBuilder is more memory-efficient than using Strings. Commented on 4.