RadTreeListView and GridViewComboBoxColumn problem

[Ram]

Hi,

I am trying to use GridViewComboBoxColumn in a RadTreeListView, but for some reason, the combobox field is always empty. Can someone tell me what am I doing wrong?

    public class WorkItemTree
    {
        public ObservableCollection<WorkItemNode> workItems
        {
            get;
            set;
        }
   }

    public class WorkItemNode
    {
        public ObservableCollection<WorkItemNode> Children
        {
            get;
            set;
        }

        public int Id
        {
            get;
            set;
        }

        public string Title
        {
            get;
            set;
        }

        public string State
        {
            get;
            set;
        }
        public List<MyState> States
        {
            get;
            set;
        }
}

    public class MyState
    {
        public string Name
        {
            get;
            set;
        }
    }

this.radTreeListView.ItemsSource = TFSManager.workItems.workItems;

<Window
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation" x:Class="TFSTreeView.MainWindow"
        Title="MainWindow" Height="350" Width="525">
    <Grid>

        <telerik:RadTreeListView x:Name="radTreeListView"
                                 AutoGenerateColumns="False" ScrollMode="Deferred"
                                 LoadingRowDetails="radTreeListView_LoadingRowDetails"
                                 RowDetailsVisibilityMode="Visible"  Margin="0,0,0,-23"
                                 IsReadOnly="True"
                                 DataLoaded="radTreeListView_DataLoaded"
                                 >
            <telerik:RadTreeListView.ChildTableDefinitions>
                <telerik:TreeListViewTableDefinition ItemsSource="{Binding Children}" />
            </telerik:RadTreeListView.ChildTableDefinitions>
            <telerik:RadTreeListView.Columns>
                <telerik:GridViewComboBoxColumn Name="State" Header="State" DataMemberBinding="{Binding State, Mode=TwoWay}" ItemsSource="{Binding States}" DisplayMemberPath="Name" SelectedValueMemberPath="Name"/>
                <telerik:GridViewDataColumn DataMemberBinding="{Binding Title}"
                                    Header="Title" />
            </telerik:RadTreeListView.Columns>
        </telerik:RadTreeListView>


    </Grid>
</Window>

[Dimitrina]

Hello,

You can check our online documentation on how to configure GridViewComboBoxColumn here. As to the empty cells, I believe that this troubleshooting article will help you to resolve the issue.

Regards,
Didie
Telerik

[Ram]

I am trying two things:

1)
<telerik:GridViewComboBoxColumn Name="BugState" Header="State" DataMemberBinding="{Binding StateId}" ItemsSourceBinding="{Binding States}" DisplayMemberPath="Name" SelectedValueMemberPath="Id"/>

when I do this, now cell is no longer empty, but it only shows a single entry and not a combo dropdown.

2)
I am trying to set the ItemsSource in code, but it looks like RadTreeListView doesn't have Columns property for me to set the itemssource.

[Dimitrina]

Hello,

You can get a reference of the column from RadTreeListView.Columns collection.

For example:

GridViewComboBoxColumn column = treeList.Columns["ComboColumn"] as GridViewComboBoxColumn;

 
Then you can assign its ItemsSource as suggested in the troubleshooting article. 

Regards,
Didie
Telerik