Please point me to (a) sample(s) to distinguish in the insert or update between a master / child the current selection is on.

Hi,

I'm working radGridView control for displaying self referencial and hierarchal data, i'm using the latest telerik binaries (i.e.WPF Q1 2010 SP2).

With my current code, this displays as:

Task 1
-- Task101
-- Task102
Task 2
-- Task201
-- Task202
Task101
Task102
Task201
Task202

I dont want to display Task101,Task102,Task201,Task202 in the main hirerarchy list, as those are the childs to Task1 and Task2

Code Pasted Below:

XAML:

 <Grid>
        <telerik:RadGridView x:Name="RadGridView1"
             DataLoading="RadGridView1_DataLoading" RowLoaded="RadGridView1_RowLoaded" GridLinesVisibility="Horizontal"
            CanUserFreezeColumns="False" IsReadOnly="True" AutoGenerateColumns="False"  >

            <telerik:RadGridView.Columns>
                <telerik:GridViewDataColumn  DataMemberBinding="{Binding TaskId}"  />
               
                <telerik:GridViewDataColumn Header="Task Name" DataMemberBinding="{Binding TaskName}" />

                <telerik:GridViewDataColumn Header="Read">
                    <telerik:GridViewColumn.CellTemplate>
                        <DataTemplate>
                            <CheckBox x:Name="checkBoxRead" IsChecked="{Binding Read}" />
                        </DataTemplate>
                    </telerik:GridViewColumn.CellTemplate>
                </telerik:GridViewDataColumn>

                <telerik:GridViewDataColumn Header="Write">
                    <telerik:GridViewColumn.CellTemplate>
                        <DataTemplate>
                            <CheckBox x:Name="checkBoxWrite" IsChecked="{Binding Write}" />
                        </DataTemplate>
                    </telerik:GridViewColumn.CellTemplate>
                </telerik:GridViewDataColumn>

            </telerik:RadGridView.Columns>

            <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>

        </telerik:RadGridView>
    </Grid>

.CS Code:

/// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            //RadGridView1. .MasterTableView.FilterExpression = "ParentID = 0";
            RadGridView1.ItemsSource = GetTasks();
           
        }

        private List<Task> GetTasks()
        {
            List<Task> tasks = new List<Task>();

            tasks.Add(new Task { TaskId = 1, TaskName = "Task1", Read = true, Write = true, ParentTaskId = 0 });
            tasks.Add(new Task { TaskId = 2, TaskName = "Task2", Read = false, Write = true, ParentTaskId = 0 });

            tasks.Add(new Task { TaskId = 101, TaskName = "Task101", Read = true, Write = true, ParentTaskId = 1 });
            tasks.Add(new Task { TaskId = 102, TaskName = "Task102", Read = false, Write = false, ParentTaskId = 1 });

            tasks.Add(new Task { TaskId = 201, TaskName = "Task201", Read = true, Write = true, ParentTaskId = 2 });
            tasks.Add(new Task { TaskId = 202, TaskName = "Task202", Read = false, Write = false, ParentTaskId = 2 });

            //tasks.Add(new Task { TaskId = 1011, TaskName = "Task1011", Read = true, Write = false, ParentTaskId = 101 });

         
            return tasks;
        }

        private bool HasSubTasks(Task currentTask)
        {
            return
            (from task in (IEnumerable<Task>)this.RadGridView1.ItemsSource
             where task.ParentTaskId == currentTask.TaskId
             select task).Any();
        }

        private void RadGridView1_RowLoaded(object sender, Telerik.Windows.Controls.GridView.RowLoadedEventArgs e)
        {

            GridViewRow row = e.Row as GridViewRow;
            Task currentTask = e.DataElement as Task;

            if (row != null && currentTask != null)
            {
                row.IsExpandable = this.HasSubTasks(currentTask);
            }
        }

        private void RadGridView1_DataLoading(object sender, GridViewDataLoadingEventArgs e)
        {
            GridViewDataControl dataControl = (GridViewDataControl)sender;

            if (dataControl.ParentRow != null)
            {
                dataControl.ShowGroupPanel = false;
                dataControl.AutoGenerateColumns = false;
                dataControl.CanUserFreezeColumns = false;
                dataControl.IsReadOnly = false;
                dataControl.ChildTableDefinitions.Clear();

                GridViewDataColumn column = new GridViewDataColumn();
                column.DataMemberBinding = new Binding("TaskId");
                dataControl.Columns.Add(column);

                column = new GridViewDataColumn();
                column.DataMemberBinding = new Binding("TaskName");
                dataControl.Columns.Add(column);

                column = new GridViewDataColumn();
                column.DataMemberBinding = new Binding("Read");
                dataControl.Columns.Add(column);

                column = new GridViewDataColumn();
                column.DataMemberBinding = new Binding("Write");
                dataControl.Columns.Add(column);
            }

        }
    }

    public class Task
    {
        public int TaskId { get; set; }
        public string TaskName { get; set; }
        public bool Read { get; set; }
        public bool Write { get; set; }

        public int ParentTaskId { get; set; }

    }

Thanks,
-Narendra