SelectedIndexChanged

The SelectedIndexChanged event occurs when the selected item has just changed.

The SelectedIndexChanged event does not fire unless the AutoPostBack property is True .

The SelectedIndexChanged event handler receives two arguments:

1. The RadMultiColumnComboBox that is loading items. This argument is of type object, but can be cast to the RadMultiColumnComboBox 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 previously selected item.
   • OldValue is the value of the previously selected item.

Use the SelectedIndexChanged event handler to respond in server-side code when the user changes the current selection:

ASPNET

<asp:Label Text="text" ID="Label1" runat="server" />
<telerik:RadMultiColumnComboBox ID="RadMultiColumnComboBox1" AutoPostBack="true" DataTextField="text" DataValueField="value" OnSelectedIndexChanged="RadMultiColumnComboBox1_SelectedIndexChanged"
	runat="server" RenderMode="Lightweight">
	<Items>
		<telerik:MultiColumnComboBoxItem Text="Item 1" Value="1" />
		<telerik:MultiColumnComboBoxItem Text="Item 2" Value="2" />
		<telerik:MultiColumnComboBoxItem Text="Item 3" Value="3" />
		<telerik:MultiColumnComboBoxItem Text="Item 4" Value="4" />
	</Items>
</telerik:RadMultiColumnComboBox>

C#

protected void RadMultiColumnComboBox1_SelectedIndexChanged(object sender, Telerik.Web.UI.RadMultiColumnComboBoxSelectedIndexChangedEventArgs e)
{
	var text = string.Format("Text:'{0}', Value:'{1}'", e.Text, e.Value;
	Label1.Text = text;
}

VB.NET

Protected Sub RadMultiColumnComboBox1_SelectedIndexChanged(ByVal sender As Object, ByVal e As Telerik.Web.UI.RadMultiColumnComboBoxSelectedIndexChangedEventArgs)
	Dim text = String.Format("Text:'{0}', Value:'{1}'", e.Text, e.Value)
	Label1.Text = text
End Sub