Hi again,

Andrew, I tried your solution and it solves part of my problem. In a situation where I use the control directly in a window it works fine now and the errors are gone, thanks!.

However when I make a usercontrol and set some dependencyproperties to my max/min values the control ends up having no range at all and the only valid value is the max or min value that is last in the xaml.

here is the code from the usercontrol setting the depprops

 public static readonly DependencyProperty MinValProperty =

         DependencyProperty.Register("ValueMinMine", typeof(double), typeof(UserControl1));

        public double ValueMinMine

        {

            get

            {

                return (double)GetValue(UserControl1.MinValProperty);

            }

            set

            {

                SetValue(UserControl1.MinValProperty, value);

            }

        }

        public static readonly DependencyProperty MaxValProperty =

         DependencyProperty.Register("ValueMaxMine", typeof(double), typeof(UserControl1));

        public double ValueMaxMine

        {

            get

            {

                return (double)GetValue(UserControl1.MaxValProperty);

            }

            set

            {

                SetValue(UserControl1.MaxValProperty, value);

            }

        }

    public class ValuesToValueConstraintConverter : IMultiValueConverter

    {

        object IMultiValueConverter.Convert(object[] values, Type targetType, object parameter, System.Globalization.CultureInfo culture)

        {

            if (values == null || values.Length != 2)

                return Binding.DoNothing;

            ValueConstraint vc = new ValueConstraint();

            vc.MinInclusive = values[0];

            vc.MaxInclusive = values[1];

            return vc;

        }

        object[] IMultiValueConverter.ConvertBack(object value, Type[] targetTypes, object parameter, System.Globalization.CultureInfo culture)

        {

            return new object[] { Binding.DoNothing };

        }

    }

and the xaml from the usercontrol

<igEditors:XamNumericEditor Value="{Binding Path=ValueMine,diag:PresentationTraceSources.TraceLevel=High, ElementName=MyNumEdit, Mode=TwoWay}" 

x:Name="MySpinner" 

HorizontalAlignment="Left"

Margin="10,42,0,0" 

Mask="{}{double:6.2}" 

PromptChar=" " 

SpinButtonDisplayMode="Always" 

SpinIncrement="1"  

ValueType="{x:Type my:Double}" 

VerticalAlignment="Top" Width="138">

<igEditors:XamNumericEditor.ValueConstraint>

<MultiBinding Converter="{StaticResource valueConstraintConverter}">

<Binding ElementName="MyNumEdit" Path="ValueMaxMine"  Mode="OneTime" diag:PresentationTraceSources.TraceLevel="High" />

<Binding ElementName="MyNumEdit" Path="ValueMinMine" Mode="OneTime" diag:PresentationTraceSources.TraceLevel="High"/>

</MultiBinding>

</igEditors:XamNumericEditor.ValueConstraint>

</igEditors:XamNumericEditor>

Am I missing something here?

Thanks 

Hans

Thanks for the fast answer! very impressive :)

hans

ElementName bindings would only work for properties of objects in the visual tree (i.e. uielements). The ValueConstraint is a subobject that contains constraint related properties but it is not a visual element so you cannot do element name bindings on its properties. This works for the Value property because that is a property of the visual element (the xamNumericEditor in this case). If you wanted you could probably create your own IValueConverter that would create a ValueConstraint. e.g.

 public class ValuesToValueConstraintConverter : IMultiValueConverter
 {
  object IMultiValueConverter.Convert(object[] values, Type targetType, object parameter, System.Globalization.CultureInfo culture)
  {
   if (values == null || values.Length != 2)
    return Binding.DoNothing;

   ValueConstraint vc = new ValueConstraint();
   vc.MinInclusive = values[0];
   vc.MaxInclusive = values[1];
   return vc;
  }
  object[] IMultiValueConverter.ConvertBack(object value, Type[] targetTypes, object parameter, System.Globalization.CultureInfo culture)
  {
   return new object[] { Binding.DoNothing };
  }
 }

Then you would use it like this:

 <StackPanel xmlns:local="clr-namespace:WpfApplication3">
  <StackPanel.Resources>
   <local:ValuesToValueConstraintConverter x:Key="valueConstraintConverter" />
  </StackPanel.Resources>
  <igEditors:XamNumericEditor x:Name="numMin" Value="0" SpinButtonDisplayMode="Always" />
  <igEditors:XamNumericEditor x:Name="numMax" Value="20" SpinButtonDisplayMode="Always" />
  
  <igEditors:XamNumericEditor>
   <igEditors:XamNumericEditor.ValueConstraint>
    <MultiBinding Converter="{StaticResource valueConstraintConverter}">
     <Binding ElementName="numMin" Path="Value" />
     <Binding ElementName="numMax" Path="Value" />
    </MultiBinding>
   </igEditors:XamNumericEditor.ValueConstraint>
  </igEditors:XamNumericEditor>
 </StackPanel>