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>

 Mode="OneWay" works also ;)

That was the reason! Cool, here is the final version that now works:

 <igEditors:XamNumericEditor.ValueConstraint>

                        <MultiBinding Converter="{StaticResource valueConstraintConverter}">

                    <Binding ElementName="MyNumEdit" Path="ValueMaxMine"   />

                    <Binding ElementName="MyNumEdit" Path="ValueMinMine" />

                        </MultiBinding>

</igEditors:XamNumericEditor.ValueConstraint>

Removing the Mode altogether has the same effect as using the Mode="TwoWay".

Thanks for all the help

Hans

Unless I'm missing something the problem is that you are using a OneTime binding on the bindings in the multi value converter. It works for the slider because you have a TwoWay binding there so when the property is changed (because you bound it to the property on the window) the slider gets the newer value but since the value constraint has a OneTime binding it only gets the initial value. I think that you want OneWay bindings on the converter.

Hi Andrew, thanks for your answer. I only mentioned the sequence because I thought it would give some clue. That was just an observation.  

The main problem is that I cant bind the max /min values when using the XamNumericEditor in a usercontrol. For the  XamNumericSlider the binding of the max/min value work just as expected even if used within the user control.

When using the XamNumericEditor  directly from a window the bindung method you proposed works good.

However I think it would be useful to put XamNumericEditor into a usercontrol  together with XamNumericSlider  and to be able to set the max/min values for each instance of the usercontrol differently. Thinking about it I also would need the SpinIncrement to be bound.

Here is some simplified code. It creates a window with my user control,  unfortunately the XamNumericEditor has  an invalid range. Its still the range (4...82) from the underlying component not the range that was bound from the container. The slider has the correct range (110...1100).

My container window looks like this:

<Window x:Class="t1wpf.Window2"

        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

        x:Name="Window_2"

        Title="Window2" Height="288" Width="571"

        xmlns:my1="clr-namespace:t1wpf"

        xmlns:ig="http://schemas.infragistics.com/xaml"

        xmlns:igEditors="http://infragistics.com/Editors" xmlns:igCA="http://infragistics.com/Chart"

        xmlns:my="clr-namespace:Infragistics.Samples.WPF.xamFeatureBrowser.XamChart"

        xmlns:diag="clr-namespace:System.Diagnostics;assembly=WindowsBase"            

    <Grid>

        <my1:UserControl1 x:Name="userControl11"

            ValueMine="{Binding ElementName=Window_2, Path=mynum}"

            ValueMaxMine="{Binding ElementName=Window_2, Path=mynumMax, Mode=TwoWay}"

            ValueMinMine="{Binding ElementName=Window_2, Path=mynumMin, Mode=TwoWay}"

             HorizontalAlignment="Left" Margin="12,49,0,0" VerticalAlignment="Top">

        </my1:UserControl1>

    </Grid>

</Window>

The code behind is :

namespace t1wpf

{

    /// <summary>

    /// Interaction logic for Window2.xaml

    /// </summary>

    public partial class Window2 : Window

    {

        public Window2()

        {

            mynum = 142;

            mynumMax = 1100;

            mynumMin = 110;

            InitializeComponent();

        }

        private double _mynum;

        public double mynum

        {

            get { return _mynum; }

            set

            {

                _mynum = value;

                Debug.WriteLine(value);

            }

        }

        private double _mynumMax;

        public double mynumMax

        {

            get { return _mynumMax; }

            set

            {

                _mynumMax = value;

                Debug.WriteLine(value);

            }

        }

        private double _mynumMin;

        public double mynumMin

        {

            get { return _mynumMin; }

            set

            {

                _mynumMin = value;

                Debug.WriteLine(value);

            }

        }

    }

}

<UserControl x:Class="t1wpf.UserControl1"

             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 

             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 

             xmlns:diag="clr-namespace:System.Diagnostics;assembly=WindowsBase"

             mc:Ignorable="d" 

             d:DesignHeight="135" 

             d:DesignWidth="343" 

             xmlns:ig="http://schemas.infragistics.com/xaml" 

             xmlns:igEditors="http://infragistics.com/Editors"

             xmlns:my="clr-namespace:System;assembly=mscorlib"

             xmlns:t1wpf="clr-namespace:t1wpf" 

             x:Name="MyNumEdit" 

             xmlns:my1="clr-namespace:NumericBox;assembly=NumericBox"

             xmlns:local="clr-namespace:t1wpf"

             >

    <UserControl.Resources>

        <local:ValuesToValueConstraintConverter x:Key="valueConstraintConverter" />

        </UserControl.Resources>

    <Canvas Height="136" Name="canvas1" Width="339" >

        <ig:XamNumericSlider x:Name="MySlider"  

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

                             MinValue="{Binding Path=ValueMinMine, diag:PresentationTraceSources.TraceLevel=High, ElementName=MyNumEdit, Mode=TwoWay}"

                             MaxValue="{Binding Path=ValueMaxMine, diag:PresentationTraceSources.TraceLevel=High, ElementName=MyNumEdit, Mode=TwoWay}"

                             HorizontalAlignment="Left" 

                             Margin="169,44,0,0"  

                             VerticalAlignment="Top" 

                             Width="159" Grid.ColumnSpan="2" />

        <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.ValueConstraint>

                <igEditors:ValueConstraint 

                    MaxInclusive="{Binding Path=DataContext.ValueMaxMine, diag:PresentationTraceSources.TraceLevel=High, ElementName=MyNumEdit, Mode=TwoWay }" 

                    MinInclusive="{Binding Path=DataContext.ValueMinMine, diag:PresentationTraceSources.TraceLevel=High, ElementName=MyNumEdit, Mode=TwoWay}"

                    />

            </igEditors:XamNumericEditor.ValueConstraint>-->

        </igEditors:XamNumericEditor>

        <Label Content="Label" Height="28" HorizontalAlignment="Left" Margin="10,10,0,0" Name="label1" 

               VerticalAlignment="Top" Width="318" Grid.ColumnSpan="2" />

        <!--<Slider  Name="sldr" 

                 Value="{Binding Path=ValueMine, ElementName=MyNumEdit, Mode=TwoWay}"

                 Maximum="{Binding Path=ValueMaxMine, ElementName=MyNumEdit, Mode=TwoWay}"

                 Minimum="{Binding Path=ValueMinMine, ElementName=MyNumEdit, Mode=TwoWay}"

                 Margin="31,101,26,0" Height="31" VerticalAlignment="Top" Width="316" Canvas.Left="-19" />-->

        <Label Content="{Binding Path=ValueMine, ElementName=MyNumEdit, Mode=TwoWay}" Margin="10,69,12,58" Height="27" Width="318" />

    </Canvas>

</UserControl>

and the code behind:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Data;

using System.Windows.Documents;

using System.Windows.Input;

using System.Windows.Media;

using System.Windows.Media.Imaging;

using System.Windows.Navigation;

using System.Windows.Shapes;

using Infragistics.Windows.Editors;

namespace t1wpf

{

    public partial class UserControl1 : System.Windows.Controls.UserControl

    {

        public UserControl1()

        {

            ValueMine = 12;

            ValueMinMine = 4;

            ValueMaxMine = 82;

            //base.DataContext = this;

            DataContext = this;

            InitializeComponent();

       }

        public static readonly DependencyProperty ValueProperty =

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

        public double ValueMine

        {

            get

            {

                return (double)GetValue(UserControl1.ValueProperty);

            }

            set

            {

                SetValue(UserControl1.ValueProperty, value);

            }

        }

        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[1];

            vc.MaxInclusive = values[0];

            return vc;

        }

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

        {

            return new object[] { Binding.DoNothing };

        }

    }

}

thanks for your patience

Hans

The order of the bindings in the multi binding must match up with how the converter is expecting them.

hansrwindhoff said:

 

ValueConstraint vc = new ValueConstraint();

            vc.MinInclusive = values[0];

            vc.MaxInclusive = values[1];

hansrwindhoff said:

<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>

The converter expects the first to be the MinInclusive and the second to be the MaxInclusive but you are passing the ValueMax as the 1st parameter and ValueMin as the 2nd parameter.