TreeView Edited event NewValue and OldValue

[Lauren Nickerson]

Hi, so I'm in this event I need the old value to do some evaluation, but instead, I get the NewValue on both objects:

private void treeViewExperimentExplorer_Edited(object sender, RadTreeViewItemEditedEventArgs e)
{
   string newName = e.NewValue.ToString();
   string oldName = e.OldValue.ToString();
}

In there both newName and oldName have the new value. How can I get the previous value in there?

Thanks!

[Miroslav]

Hi Lauren Nickerson,

Unfortunately when the TreeView uses an ItemEditTemplate (i.e. it is bound) it will not populate these properties. They contain just the data item that the TreeView is bound to.

We are looking to enable these properties for the Q1 release of the controls when the TreeView is bound.

In the meantime I can suggest storing the value that you need in a field when editing starts and then refering to it if you need to when editing ends.

Regards,
Miroslav
the Telerik team

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[Lauren Nickerson]

That was plan B. Thanks!

[Menny]

its 2012 now and this still happens

[Kiril Stanoev]

Hello Menny,

The previously mentioned behavior is by design. Our suggestion is to use the PreviewEdited and Edited events to distinguish between the new and old values. Please take a look at the attached project for further reference.

Greetings,
Kiril Stanoev
the Telerik team

[Menny]

yeh, figured it out

[Albert]

Hello Kiril,

I ran the project in 269235.zip , but it appears that this.oldTitle is always equal to the newly edited value. I am unable to find the value before editing (ie. the oldValue). What am I missing here?

Kind Regards,
Albert

[Albert]

Okay, I figured it out.

I handled the EditStarted event to store the value before the edit occurs:

        private void treeView1_EditStarted(object sender, Telerik.Windows.Controls.RadTreeViewItemEditedEventArgs e)
        {
            this.titleBeforeEdit = (e.OldValue as DataItem).Title;            
        }

Kind Regards,
Albert