Hello!
I want to use Drag and Drop for elements inside XamTreeGrid. Is it possible? Please, give me example.

I used the sample code to successfully drag and drop from the xamdatatree to the xamdatagrid.

But I'm getting a NullReferenceException error in the VS2010 designer in the controltemplate for the DataRecordPresenter.  The line that is causing this problem is commented out in the following xaml: 

<

Border
x:Name="RecordSeparator"
Grid.Row="2"
Grid.Column="1"
Visibility="Collapsed"
Grid.ColumnSpan="6"/>

<!-- Style="{DynamicResource {ComponentResourceKey {x:Type igDP:XamDataGrid}, RecordSeparatorStyle}}" -->

If I put this line back in to the <Border> definition, I get the NullReferenceException error in the designer. I went thru the entire controltemplate and changed any "ComponentResourceKey" bindings to use "x:Static" instead but I could not figure out how to change the binding for the Style property, for example:

 <Border
Visibility="Collapsed"
Background="{DynamicResource {x:Static igDP:DataPresenterBrushKeys.AddRowBackgroundKey}}"
BorderBrush="{TemplateBinding BorderBrush}"
HorizontalAlignment="Stretch"
x:Name="addRowFooter"
VerticalAlignment="Stretch"
Width="Auto"
Height="Auto"
BorderThickness="{TemplateBinding BorderThickness}"
SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>

Instead of:

 <Border
Visibility="Collapsed"
Background="{DynamicResource {ComponentResourceKey {x:Type igDP:XamDataGrid}, AddRowBackground}}"
BorderBrush="{TemplateBinding BorderBrush}"
HorizontalAlignment="Stretch"
x:Name="addRowFooter"
VerticalAlignment="Stretch"
Width="Auto"
Height="Auto"
BorderThickness="{TemplateBinding BorderThickness}"
SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>

Any ideas abount how to change the binding not to use "ComponentResourceKey" or another way to get rid of the NullReferenceException error?

Thanks,

Dalia

Hi Chris,

I am really glad, I could help out. If you do not have any further questions, please verify this thread as answered, so it helps other users as well.

Thanks in advance.

Best regards Petar.

Hello,

I received your sample project and it allows me to drag out of a XamDataGrid. There was a substantial amount of Xaml code to achieve the objective of dragging a row from the grid. While awaiting your response I went ahead and derived a class from XamDataGrid and put drag/drop functionality into it. I believe both solutions will work for me. I am still adding functionality to the product on which I am working and will wind up using whatever solution works best in the long term. Thanks for your attention to this matter and the effort you put into it.

Chris