Codejock Developer Community : Drag & drop between 2 treeviews

Author: iamgtd
Subject: 15483
Posted: 28 October 2009 at 6:14am

I need help for the drag & drop operation between two CodeJock treeviews.

In the OLEDragDrop-event the target treeview receives something. But I'm not able to convert this to a TreeViewNode. Please see the code. Is it necessary to do something in the OLEDragOver-Event? A sample would be great.

private void SourceTreeView_OLEStartDrag(object sender, AxXtremeSuiteControls._DTreeViewEvents_OLEStartDragEvent e)
{
    e.allowedEffects = 1; // Copy

    // ------------------------------------------------------------------------------------------------------------------------------------------
    // Is it necessary to use the SetData-method?
    // ------------------------------------------------------------------------------------------------------------------------------------------
    //XtremeSuiteControls.TreeViewNode node = SourceTreeView1.SelectedItem;
    //e.data.Clear();
    //e.data.SetData(node,???Format???);
}

private void TargetTreeView_OLEDragDrop(object sender, AxXtremeSuiteControls._DTreeViewEvents_OLEDragDropEvent e)
{
    XtremeSuiteControls.TreeViewNode newnode = (XtremeSuiteControls.TreeViewNode)e.data;
    // ------------------------------------------------------------------------------------------------------------------------------------------
    // newnode is always null

// type of e.data is XtremeSuiteControls.DataObject {System.__ComObject} and the value is {System.__ComObject}.

// How can I convert this to a TreeViewNode?

// What's to do with the e.effect-value? This value is alwasy 7.
// ------------------------------------------------------------------------------------------------------------------------------------------
}

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