This example shows how to validate the focused cell's value. In this example, users cannot reduce the product's price by more than 30% if the product is on discount.

• MainWindow.xaml (MainWindow.xaml)
• MainWindow.xaml.cs (MainWindow.xaml.vb)

• MainWindow.xaml (MainWindow.xaml)
• MainViewModel.cs (MainViewModel.vb)

• Data Editing and Validation
• Cell Validation
• GridViewBase.ValidateCell
• TreeListView.ValidateCell
• GridViewBase.ValidateCellCommand
• TreeListView.ValidateCellCommand

• How to Validate Data Rows
• How to Implement Attributes-Based Validation