Question

I have a list of TextBoxes which are bound to different properties.

<TextBox Text="{Binding Name, Mode=TwoWay,ValidatesOnDataErrors=True, ValidatesOnExceptions=True, NotifyOnValidationError=True}" VerticalAlignment="Center" Margin="5" Width="300" Grid.Column="1" Grid.Row="1" LostFocus="TextBox_Validate"/>

I would like to write ONE handler such as

private void TextBox_Validate(object sender, RoutedEventArgs e)
        {
            var textBox = (sender as TextBox);
            if(textBox!=null)
            {
                var propertyName = X; // Get propertyName textBox.Text is bound to.
                CurrentDataContext.ValidateFields("Name"); // Name in this specific textBox
            }
        }

Is it possible to get the name of the property so I won’t have to write many different methods that do the same thing?

Answer 1

I think this is what you want:

var expression = textBox.GetBindingExpression(TextBox.TextProperty);
if (expression != null && expression.ParentBinding != null)
{
    var propertyName = expression.ParentBinding.Path.Path;
}

Edit

Or you can use BindingOperations.GetBinding as shown here. I’m not sure if one way is better than the other.