Expanded Event issue

[Harsh]

Hi,
   I am using expanded event of the WPF Treeview to populate children of the parent node when the parent node is clicked.

I am binding my treeview with the collection. Collection has 2 things
a. Name
b. Commodity

On page load:

this

.RadTreeView.Items.Add(new RadTreeViewItem()

 

{

Header = "Name"

 

});

 

this.RadTreeView.Items.Add(new RadTreeViewItem()

 

{

Header = "Commodity"

 

});

Now I want to show the children under commodity on click of commodity (parent node).

 

private

void RadTreeView_Expanded(object sender, Telerik.Windows.RadRoutedEventArgs e) { 

 

 

 

 

 

RadTreeView objRadTreeView = sender as RadTreeView;

 

 

 

RadTreeViewItem objRadItem = e.OriginalSource as RadTreeViewItem;

 

 

 

CommodityCollection objCommodityCollection = this.CommodityCollection;

 

 

 

 

for (int i = 0; i < objCommodityCollection.Count; i++) {

 

 

 

 

 

 

objRadItem.Items.Add(

objCommodityCollection[i].CommodityName);

 

 

 

    }
}

 

Now the issue is when I run the application, as currently there are no child for commodity I am not getting expand icon on the left side of commodity (when the page is loaded) because of which Expanded event is not called.

How to resolve this issue?

 

 

 

[Tihomir Petkov]

Hello Harsh,

Please refer to the following two blog posts:

http://blogs.telerik.com/ValentinStoychev/Posts/08-08-05/How_to_Databind_RadTreeView_in_WPF.aspx
http://blogs.telerik.com/valerihristov/posts/08-10-08/Silverlight_TreeView_Load_on_Demand.aspx

I believe these article clarify what you want to know - let me know if you still need assisstance after reading them.

Best wishes,
Tihomir Petkov
the Telerik team

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