DevExpress-Examples/wpf-mvvm-framework-validationerrorshostbehavior

To validate a UI container with the ValidationErrorsHostBehavior, implement the IDataErrorInfo interface (if your View is a ViewModeBase descendant).

WPF MVVM Framework - Validate a View with ValidationErrorsHostBehavior and ViewModelBase

The example shows how to use ValidationErrorsHostBehavior to validate a View.

Overview

You can define ValidationErrorsHostBehavior for the root element to track all validation errors within the View. To enable validation error notifications, set the NotifyOnValidationError and ValidatesOnDataErrors properties to true.

Use the ValidationErrorsHostBehavior.HasErrors property to check whether a validation error occured.

Files to Look At

• MainView.xaml (VB: MainView.xaml)
• MainViewMode.cs (VB: MainViewMode.vb)

Documentation

• ValidationErrorsHostBehavior
• Behaviors

More Examples

WPF MVVM Framework - Validate a View with ValidationErrorsHostBehavior and POCO

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