SourceDragNode always null

[David Sitton]

Hi there.

I am using the TreeView and trying to implement the drag and drop functionality for reordering. I have setup the NodeDrop event as per the documentation using e.SourceDragNode and e.DestDragNode. The DestDragNode works fine however the SourceDragNode always seems to return null.
Setup is as follows ...

ASPX...

<

telerik:RadTreeView ID="treeMenu" runat="server" DataTextField="Text" DataValueField="Value"

AllowNodeEditing="True" EnableDragAndDrop="True" EnableViewState="True"

EnableDragAndDropBetweenNodes="True" OnNodeDrop="treeMenu_NodeDrop"

CheckBoxes="True" >

<CollapseAnimation Type="OutQuint" Duration="100"></CollapseAnimation>

<ExpandAnimation Duration="100"></ExpandAnimation>

</telerik:RadTreeView>

C#...

protected

void treeMenu_NodeDrop(object sender, RadTreeNodeDragDropEventArgs e)
{
RadTreeNode sourceNode = e.SourceDragNode;
RadTreeNode destNode = e.DestDragNode;
RadTreeViewDropPosition dropPosition = e.DropPosition;

if (destNode != null)
{
    if (sourceNode.TreeView.SelectedNodes.Count <= 1)
        {
            PerformDragAndDrop(dropPosition, sourceNode, destNode);
        }
    else if (sourceNode.TreeView.SelectedNodes.Count > 1)
        {
            foreach (RadTreeNode node in sourceNode.TreeView.SelectedNodes)
                {
                    PerformDragAndDrop(dropPosition, node, destNode);
                }
        }
    destNode.Expanded = true;
    sourceNode.TreeView.ClearSelectedNodes();
}
}

private

static void PerformDragAndDrop(RadTreeViewDropPosition dropPosition, RadTreeNode sourceNode, RadTreeNode destNode)
...

Please can someone help me to understand why this is happening???

many thanks

[Atanas Korchev]

Hello David Sitton,

We had a similar bug in an older version of the control. Could you please confirm that you are using the latest official release 2008.1 619?

Regards,
Albert
the Telerik team

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[David Sitton]

Hi Albert.

I have just updated to v619 and it seems to work beautifully!
Thanks for the advice.

Dave

[john]

Hi Dave,

Is this release refering to Q1 or Q2?

Thank you

John

[Veselin Vasilev]

Hello john,

The release 2008.1.619 refers to Q1 2008 SP2.


All the best,
Veskoni
the Telerik team

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[john]

Hi Veskoni,

Thanks so much.

John

[bradhh]

I'm now having the same problem using version 2008.3.1417.35. This code worked before I upgraded (back when I was using Q2 2008). The only change I've made is upgrading to the latest version. I orignally upgraded to Q3 2008, but since I couldn't paste into a multiline text box I had to upgrade to the latest "untested" version. Now I find that I can't drag nodes in RadTreeView.

Any help would be appreciated!

Thanks -
Brad Harris

[Veselin Vasilev]

Hi bradhh,

We have released the Q1 2009 Beta version. Can you please try with it? I could not reproduce the problem on our online demos.

I suggest that you open a new support ticket and send us a sample project demonstrating the problem.

Thanks

Greetings,
Veselin Vasilev
the Telerik team

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