Expand and collapse ('-' and '+') is not shown

[Raj Sharma]

I have created a control derived from Telerik.WinControls.UI.RadTreeView (Latest trial version)

I am also creating the RadTreeNode on fly..

I am setting below properties at runtime.

groupTreeView.AllowArbitaryItemHeight =

true;

 

 

 groupTreeView.AllowPlusMinusAnimation = 

true;

 

 

 groupTreeView.DropFeedbackColor = 

Color.Black;

 

 

 groupTreeView.Enabled = 

true;

 

 

 groupTreeView.ExpandAnimation =

ExpandAnimation.Opacity;

 

 

 groupTreeView.Focusable =

true;

 

 

 

groupTreeView.PlusMinusAnimationStep = 10;

 

groupTreeView.ShowExpandCollapse =

true;

 

 

 groupTreeView.ToggleMode =

ToggleMode.SingleClick;

 

 

 groupTreeView.UseNewLayoutSystem =

true;

but this does not show me the Expand(+) and collapse(-) sign.


Note my TreeViewXML..
<?xml version="1.0" encoding="utf-16"?>
<TreeView xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" UseDefaultSelection="true" AllowDragDrop="true" AllowPlusMinusAnimation="true" ThemeName="Office2007Black" AllowDrop="true" BackColor="Window" DropFeedbackColor="Red" LineColor="ActiveCaption">
</TreeView>
Please help..

 

 

 

 

[Victor]

Hi Raj Sharma,

When inheriting from RadTreeView you also need to override ThemeClassName property and return the full name of the RadTreeView type. For example:

 

public class MyTreeView : RadTreeView
{
    public override string ThemeClassName
    {
        get
        {
            return typeof(RadTreeView).FullName;
        }

        set
        {
            base.ThemeClassName = value;
        }
    }
}

The expand collapse images are most likely not being shown because they are set through styles and the themes for RadTreeView are not valid for your type. Overriding the ThemeClassName property should do the trick. Please write again if you have other questions.

Sincerely yours,
Victor
the Telerik team

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[Raj Sharma]

thanks a lot.. things have started working as expected...