SingleSelection Self-Referencing Hierarchy

[Abdulrahman Omran]

Hi,

I have a hierarchical grid of Tasks. Each parent row (task) has the possibility of having 0-* child rows (tasks). The depth of the grid is indefinite.

Currently the grid SelectionMode is set to single but the grid allows the selection of one parent and one child at a time. I want to restrict the user to only be able to select a single task at a time ( regardless of whether it's a parent or a child task). - refer to the attached image.


I'm adding the child table definitions on the Xaml file. This is the code snippet:

<telerik:RadGridView.ChildTableDefinitions>
   <telerik:GridViewTableDefinition>
        <telerik:GridViewTableDefinition.Relation>
             <telerik:TableRelation IsSelfReference="True">
                 <telerik:TableRelation.FieldNames>
                       <telerik:FieldDescriptorNamePair ParentFieldDescriptorName="TaskId" ChildFieldDescriptorName="ParentTaskId"/>
                 </telerik:TableRelation.FieldNames>
             </telerik:TableRelation>
      </telerik:GridViewTableDefinition.Relation>
   </telerik:GridViewTableDefinition>
</telerik:RadGridView.ChildTableDefinitions>

And I'm defining the child grid on the dataloading event:

  private void ProjectTasksGridView_DataLoading(object sender, GridViewDataLoadingEventArgs e)

        {

            GridViewDataControl dataControl = (GridViewDataControl)sender;

            if (dataControl.ParentRow != null)

            {

 

                dataControl.GridLinesVisibility = GridLinesVisibility.Vertical;

                dataControl.IsFilteringAllowed = false;

                dataControl.ShowGroupPanel = false;

                dataControl.SelectionMode = System.Windows.Controls.SelectionMode.Single;

                dataControl.AutoGenerateColumns = false;

                dataControl.CanUserFreezeColumns = false;

 

                dataControl.IsReadOnly = true;

              

                dataControl.RowLoaded += new EventHandler<RowLoadedEventArgs>(ProjectTasksGridView_RowLoaded);

                dataControl.SelectionChanged += this.ProjectTasksGridView_SelectionChanged;

          

                GridViewDataColumn column = new GridViewDataColumn();

                column.DataMemberBinding = new Binding("WbsId");

                column.Header = "WBS";

                dataControl.Columns.Add(column);

 

                column = new GridViewDataColumn();

                column.DataMemberBinding = new Binding("TaskName");

                                         .

                                         .
                                         .

 

}

Looking for a reasonable solution.

Kindest Regards,
Abdul

[Maya]

Hello Abdulrahman Omran,

You may take a look at this forum thread for a reference. 

Greetings,
Maya
the Telerik team

[Abdulrahman Omran]

Hi Maya,

Thank you for the reference. I will apply the solution and then mark the reply as an answer if it does what I expect.


Regards,
Abdul

[Abdulrahman Omran]

Thank you Maya,
The solution you provided has given on how to solve my scenario.


Regards,
Abdul