Dynamicaly Changing the Image of expander of Treeview

[Kiran Mandapati]

Hi,
I am facing an issue while using the telerik treeview in below scenerio.
the images of the expander has to be changed and it has to be dynamically chosen between two images based on the data is binded to it.
when data is binded to the treeview, based on the boolean column, the nodes has to display different images, if this value is true it has to show one image and if it false it has to show another image.
when the node has expanded, then the image of that noted should be rotated version of the image shown earlier (before expanding).

[Hristo]

Hi Kiran Mandapati,

You could dynamically control the expander style and place an image inside the style in order to achieve your scenario. You could take a look at the following article which I thing should be of help: http://blogs.telerik.com/hristomilyakov/posts/11-01-17/controlling_treeview_s_expanderstyle_dynamically.aspx

All the best,
Hristo
the Telerik team

[Kiran Mandapati]

Hi Hristo,

we were using the telerik controls for WPF with version 2009.3.1314.35, in this version we could not found the property ExpanderStyle.
is this property recently added or it exists in the version I am using as well. if it is recently added please suggest another method.

[Kiril Stanoev]

Hi Kiran,

The ExpanderStyle property was added after the 2009.3.1314.35 release. As a workaround, instead of changing the expander style dynamically, you will have to change the style of the whole TreeViewItem.

All the best,
Kiril Stanoev
the Telerik team