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The SelectedIndexChanged event occurs when the user selects a new item from the drop-down list in the RadComboBox.

To use the SelectedIndexChanged, set the AutoPostBack property to True. Otherwise, the SelectedIndexChanged event will not fire.

The SelectedIndexChanged event handler receives two arguments:

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

  2. An EventArgs object. This object has the following properties for identifying what has changed:

    • Text is the text of the item that was just selected.

    • Value is the value of the item that was just selected.

    • OldText is the text of the item that was previously selected

    • OldValue is the value of the item that was previously selected

The following examples demonstrate how to use the SelectedIndexChanged event handler to respond in server-side code when the user changes the current selection:


protected void RadComboBox1_SelectedIndexChanged(object o, Telerik.Web.UI.RadComboBoxSelectedIndexChangedEventArgs e)
    Label1.Text = "You selected " + e.Text + " item";

Protected Sub RadComboBox1_SelectedIndexChanged(ByVal o As Object, ByVal e As Telerik.Web.UI.RadComboBoxSelectedIndexChangedEventArgs)

    Label1.Text = "You selected " + e.Text + " item"

End Sub

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