private static object GetValueThroughBinding(object item, Binding binding)
{
BindingExpressionHelper bindingExpressionHelper = new BindingExpressionHelper();
try
{
bindingExpressionHelper.DataContext = item;
BindingOperations.SetBinding(bindingExpressionHelper, ValueProperty, binding);
return(bindingExpressionHelper.GetValue(ValueProperty));
}
finally
{
bindingExpressionHelper.ClearValue(ValueProperty);
}
}
private static void TextBox_LostFocus(object sender, RoutedEventArgs e)
{
var textBox = sender as TextBox;
if (textBox == null)
{
return;
}
var stringFormat = GetStringFormatOnLostFocus(textBox);
if (!stringFormat.Contains("{0"))
{
stringFormat = $"{{0:{stringFormat}}}";
}
var value = BindingExpressionHelper.GetValue(textBox.DataContext, textBox.GetBindingExpression(TextBox.TextProperty).ParentBinding);
textBox.Text = string.Format(stringFormat, value);
}
