[Solved] How to set Allow Drop in a Grid Hierarchy TargetCell

[Manas]

    

 

<grid:RadGridView x:Name="gridLesson" ScrollMode="RealTime" Grid.Column="0" Grid.Row="2" AutoGenerateColumns="False"

                          AddingNewDataItem="gridLesson_AddingNewDataItem" >

            <grid:RadGridView.Columns>

                <grid:GridViewDataColumn HeaderText="UnitId" DataMemberBinding="{Binding UnitId}" />

                <grid:GridViewDataColumn HeaderText="UnitName #" UniqueName="UnitName" />

                <grid:GridViewDataColumn HeaderText="Files" Width="250" DataMemberPath="UnitFiles">

                    <grid:GridViewDataColumn.CellStyle>

                        <Style TargetType="telerikGridView:GridViewCell">

                            <Setter Property="dragDrop:RadDragAndDropManager.AllowDrop" Value="True"/>

                            <Setter Property="Template">

                                <Setter.Value>

                                    <ControlTemplate TargetType="telerikGridView:GridViewCell">

                                        <StackPanel>

                                            <ListBox ItemsSource="{Binding UnitFiles}">

                                               <ListBox.ItemTemplate>

                                                    <DataTemplate>

                                                        <core:RadDockPanel HorizontalAlignment="Stretch">

                                                            <Image Source="{Binding IconPath, Mode=TwoWay}" Width="10" Height="10" />

                                                            <HyperlinkButton Content="{Binding docname, Mode=TwoWay}" TargetName="_blank"

                                                                NavigateUri="{Binding docurl}" />

                                                         </core:RadDockPanel>

                                                    </DataTemplate>

                                                </ListBox.ItemTemplate>

                                            </ListBox>

                                        </StackPanel>

                                    </ControlTemplate>

                                </Setter.Value>

                            </Setter>

                        </Style>

                    </grid:GridViewDataColumn.CellStyle>

                </grid:GridViewDataColumn>

            </grid:RadGridView.Columns>

            <grid:RadGridView.HierarchyChildTemplate>

                <DataTemplate>

                    <StackPanel DataContext="{x:Null}">

                        <grid:RadGridView AutoGenerateColumns="False" Loaded="RadGridView_Loaded" ItemsSource="{Binding Lessions}"

                                          RowStyle="{StaticResource CustomRowStyle}" UseAlternateRowStyle="False" x:Name="grdLession" >

                            <grid:RadGridView.Columns>

                                <grid:GridViewDataColumn HeaderText="Date" DataMemberBinding="{Binding LessonDate}" />

                                <grid:GridViewDataColumn HeaderText="Lesson #" DataMemberBinding="{Binding Lesson}" />

                                <grid:GridViewDataColumn HeaderText="Aim" DataMemberBinding="{Binding AIM}" />

                                <grid:GridViewDataColumn HeaderText="Additional Information" DataMemberBinding="{Binding AdditionalInformation}" />

                                <grid:GridViewDataColumn HeaderText="Files" DataMemberPath="Files" Width="200">

                                    <grid:GridViewDataColumn.CellStyle>

                                        <Style TargetType="telerikGridView:GridViewCell">

              <Setter Property="dragDrop:RadDragAndDropManager.AllowDrop" Value="True"/>

                                            <Setter Property="Template">

                                                <Setter.Value>

                                                    <ControlTemplate TargetType="telerikGridView:GridViewCell">

                                                        <StackPanel>

                                                            <ListBox ItemsSource="{Binding Files}">

                                                                <ListBox.ItemTemplate>

                                                                    <DataTemplate>

                                                                        <core:RadDockPanel HorizontalAlignment="Stretch">

                                                                            <Image Source="{Binding IconPath, Mode=TwoWay}" Width="10" Height="10" />

                                                                            <HyperlinkButton Content="{Binding docname, Mode=TwoWay}" TargetName="_blank"

                                                                               NavigateUri="{Binding docurl}" />

                                                                        </core:RadDockPanel>

                                                                    </DataTemplate>

                                                                </ListBox.ItemTemplate>

                                                            </ListBox>

                                                        </StackPanel>

                                                    </ControlTemplate>

                                                </Setter.Value>

                                            </Setter>

                                        </Style>

                                    </grid:GridViewDataColumn.CellStyle>

                                </grid:GridViewDataColumn>

                            </grid:RadGridView.Columns>

                        </grid:RadGridView>

                    </StackPanel>

                </DataTemplate>

            </grid:RadGridView.HierarchyChildTemplate>

        </grid:RadGridView>

 

I have hierarchy grid as above describe; now I want to set AllowDrop value on ControlTemplate Column. It is working fine for Parent Grid ControlTemplate but it is giving error for HierarchyChildTemplate.

 

Can anybody provide solution quickly?

 

Thanks,

Manas

[Milan]

Hi Manas,

You could try setting the AllowDrag property in code. One possible way to do that is to subscribe to the Loaded event of StackPanel and then in code enable AllowDrag.

<StackPanel Loaded="StackPanel_Loaded">
    <ListBox ItemsSource="{Binding UnitFiles}">
    <ListBox.ItemTemplate>
        <DataTemplate>
            <core:RadDockPanel HorizontalAlignment="Stretch">
                <Image Source="{Binding IconPath, Mode=TwoWay}" Width="10" Height="10" />
                <HyperlinkButton Content="{Binding docname, Mode=TwoWay}" TargetName="_blank" NavigateUri="{Binding docurl}" />
            </core:RadDockPanel>
        </DataTemplate>
     </ListBox.ItemTemplate>
    </ListBox>
</StackPanel>

private void StackPanel_Loaded(object sender, RoutedEventArgs e)
{
    GridViewCell cell = (GridViewCell)VisualTreeHelper.GetParent((DependencyObject)sender);

    if(cell != null)
    RadDragAndDropManager.SetAllowDrag(cell, true);
}

Hope this helps.
Sorry for the delay and thank you for your patience.

Greetings,
Milan
the Telerik team

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