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Coso
4040
Problem with ComboBoxColumn and ValueConverter
posted

Hello,

I need to show in a comboboxcolumn two properties of a complex object.

To achieve that I used the ValueConverter but it doesn't show me anything.

I attached a sample to show you how I do it.

Regards.

XamGrid.zip
Parents Reply
  • 12004
    posted in reply to Coso

    Hello Coso,

    The Ok button by default sets the IsEnabled property from CanFilter that is disabled when unchecking Select All checkbox. E.g.:

    <Button x:Name="AcceptButton" Margin="0,0,5,0" Width="73" Content="{TemplateBinding OKButtonText}" IsEnabled="{Binding Path=CanFilter, RelativeSource={RelativeSource TemplatedParent}, Mode=OneWay}">

    The "No data available" message uses a TextBlock element setting the Opacity to 0 that is defined from VisualState:

    <VisualState x:Name="HideSelectionBoxWaterMark" >
     <Storyboard>
      <DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Duration="00:00:00.0010000" Storyboard.TargetName="ItemsBoxWatermark" Storyboard.TargetProperty="(UIElement.Opacity)">
       <SplineDoubleKeyFrame KeyTime="00:00:00" Value="0"/>
      </DoubleAnimationUsingKeyFrames>
     </Storyboard>
    </VisualState>

    In the AcceptChanges method possibly a condition to add a check for a null reference on RowsManager was missing:

    RowsManager rm = cell.Row.Manager as RowsManager;
    

    if (rm == null)
    {
     return;
    }

    The search textbox uses a FilterTextBoxWatermarked setting IsEnabled from the ItemSourceSet property value.

    <igPrim:FilterTextBoxWatermarked Grid.Row="2"
      Grid.Column="1"
      Margin="8,7,6,1"
      HorizontalAlignment="Stretch"
      IsEnabled="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=ItemSourceSet}"
      FilterSelectionControl="{Binding RelativeSource={RelativeSource TemplatedParent}}" />

     

    Let me know if I can provide any further assistance.

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