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[Solved] Multiple clicks to get focus of a ComboBox in TreeListView

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TreeListView

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Andreas asked on 09 Mar 2011, 11:22 AM

Hello,

I'm using a RadTreeListView with a GridViewComboBoxColumn. I need at least three clicks to open the dropdown list.
I assume first is to focus the cell second to get the edit mode third to open the list. Is there a way to do it with only one click?
Here is the XAML code of my RadTreeListView:

            <t:RadTreeListView x:Name="TreeListView"
                                 AutoGenerateColumns="False"
                                 ItemsSource="{Binding Zeile.Liste}"
                                 SelectedItem="{Binding Current, Mode=TwoWay}"
                                 CanUserReorderColumns="True"
                                 CanUserFreezeColumns="True"
                                 EnableColumnVirtualization="True"
                                 EnableRowVirtualization="True" >

                <t:RadTreeListView.ChildTableDefinitions>
                    <t:TreeListViewTableDefinition ItemsSource="{Binding Liste}"/>
                </t:RadTreeListView.ChildTableDefinitions>

                <t:RadTreeListView.HierarchyChildTemplate>
                    <DataTemplate>
                        <t:RadTreeListView ItemsSource="{Binding Liste}"/>
                    </DataTemplate>
                </t:RadTreeListView.HierarchyChildTemplate>

                <t:RadTreeListView.Columns>
                    <t:GridViewComboBoxColumn Header="Bezeichnung"
                                                    DataMemberBinding="{Binding AuswahlListeId}"
                                                    ItemsSourceBinding="{Binding AuswahlListe}"
                                                    SelectedValueMemberPath="Id"
                                                    DisplayMemberPath="Bezeichnung">

                        <t:GridViewComboBoxColumn.CellEditTemplate>
                            <DataTemplate>
                                <t1:RadComboBox ItemsSource="{Binding VerfuegbarListe}"
                                                      SelectedValue="{Binding AuswahlListeId, Mode=TwoWay}"
                                                      SelectedValuePath="Id"
                                                      DisplayMemberPath="Bezeichnung" />
                            </DataTemplate>
                        </t:GridViewComboBoxColumn.CellEditTemplate>

                    </t:GridViewComboBoxColumn>

                    <t:GridViewDataColumn DataMemberBinding="{Binding Menge}"
                                                IsReadOnly="True"
                                                Header="Menge" />
                </t:RadTreeListView.Columns>
            </t:RadTreeListView>

Regards,

Andreas

6 Answers, 1 is accepted

Accepted

answered on 10 Mar 2011, 12:47 PM

Hello Andreas,

In this case you will have to handle the SelectionChanged event of the RadComboBox and commit the changes once a value is selected from it:

this.RadGridView1.AddHandler(RadComboBox.SelectionChangedEvent, new Telerik.Windows.Controls.SelectionChangedEventHandler(comboSelectionChanged), true);

private void comboSelectionChanged(object sender, Telerik.Windows.Controls.SelectionChangedEventArgs e)

{

if (e.RemovedItems.Count != 0)

{

//this ensures a selection from the drop down is performed.

this.RadGridView1.CommitEdit();

}

Best wishes,
Maya
the Telerik team

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Accepted