The following article demonstrates the usage of the ItemDataBound server-side event of the RadTreeMap.

The ItemDataBound event occurs for each new item, that is added to the Items collection of the RadTreeMap, when it is bound. This event only occurs if the items are loaded from a data source (the DataSource or DataSourceID property is set).

The ItemDataBound event handler receives two arguments:

  1. The RadTreeMap that is loading items. This argument is of type object, but can be cast to the RadTreeMap type.

  2. An EventArgs object. This object has an Item property, which provides access to the item that was just bound.

Use the ItemDataBound event handler to make changes to items as they are bound to the data. For example, you can set custom color, based on a specific text of the currently evaluated item (see Example 1).

Example 1: Demonstrates how to set a red color, if the currently evaluated item Text is "Important Item":

protected void TreeMap1_ItemDataBound(object sender, TreeMapItemDataBoundEventArguments e)
    if (e.Item.Text == "Important Item")
        e.Item.Color = Color.Red;
Protected Sub TreeMap1_ItemDataBound(sender As Object, e As TreeMapItemDataBoundEventArguments)
    If e.Item.Text = "Important Item" Then
        e.Item.Color = Color.Red
    End If
End Sub 
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