CODEWITHSUNDEEP
.netwpf
rhughes
rhughes

Reputation: 9583

WPF Error Handling

I am new to WPF and am using MVVM. I have found that using IDataErrorInfo is good for field based validation messages.

How do I take an error that has nothing to do with user input from the ViewModel and display it on the view?

I come from a MVC background where it is easy to pass and error back to the page with AJAX. I have tried binding a label for the time being to a general ErrorMessage propery in my ModelView, but this doesn't feel right, as I am not sure where to reset the property.

I would rather not use a MessageBox.

Thank you very much for your help,

Richard Hughes

Upvotes: 1

Views: 520

Answers (1)

Josh
Josh

Reputation: 10624

The best way I've found is to add a user control that represents a message box to the view that is being shown (or, if you are using a larger MVVM framework, add it to the shell.) Then, when I come across a general error where a message box would be used, I publish the event. The shell is subscribed to the show message event and when it receives it, centers the hidden control on the screen, displaying the message from the event.

Upvotes: 1

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