Nsryjdtyk

I got a problem with bindings(i know why am i becoming this exception but dunno how to solve the problem).

I have tried this piece of code.

  <TextBlock HorizontalAlignment="Left" >

                        <TextBlock.Margin>

                            <Thickness Left="{Binding POSX.Value, Converter={StaticResource DPIConverter}}"

                                       Top="{Binding POSY.Value, Converter={StaticResource DPIConverter}}"/>

                        </TextBlock.Margin>

                    </TextBlock>

Im getting an exception where it says that, u cant bind thickness [LEFT], [TOP] properties. (ik why : cause those properties are not Dependency Property)

Thanks for ur help.

Edit : In case you didnt understand what am i trying to reach

-> I want to bind Left and Top Properties of Margin <-

That's right you can't bind Left,Top,right or Bottom, because they are not dependency property. They are CLR property. DependencyProperty is wrapper to CLR Property.

Class which defines a dependency property must be inherited from the DependencyObject class. Thickness is a class which is not inherited from DependencyObject class. But the Margin is from TextBlock, which is inherited from FrameworkElement , and FrameworkElement inherited from UIElement, and UIElement is inherited from Visual which inherits from DependencyObject class.

What you can bind is Margin, since Margin is a dependency Property registered in FrameworkElement Class.

You can change your Xaml like this
(sample code)

<TextBlock HorizontalAlignment="Left" Margin="{Binding POS, Converter={StaticResource DPIConverter}}" >

Below is the converter code, where we can send the whole thickness

 public class DPIConverter : IValueConverter

{

    public object Convert(object value, System.Type targetType, object parameter,

        System.Globalization.CultureInfo culture)

    {    // your code inside Ivalue 

         // based pn some value send left and right value. other's can zero 

         // or which ever value you need. 

          int x = POS.PosX.Value;

          int y = POS.PoxY.Value;



        return new Thickness(System.Convert.ToDouble(x), System.Convert.ToDouble(y), 0, 0);

    }



    public object ConvertBack(object value, System.Type targetType,

        object parameter, System.Globalization.CultureInfo culture)

    {

        return null;

    }

}