Telerik RadComboBox supports server-side events - simply set the AutoPostBack property to true and the combo will fire the SelectedIndexChanged event whenever the users selects a new item. The event handler of SelectedIndexChanged event receives arguments of type RadComboBoxSelectedIndexChangedEventArgs which contain the current and previous text of the combo input field.
Consider the example below:
| ASPX |
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<radcb:RadComboBox
id="RadComboBox1"
Runat="server"
AutoPostBack="True"
OnSelectedIndexChanged="RadComboBox1_SelectedIndexChanged">
</radcb:RadComboBox>
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| C# |
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private void RadComboBox1_SelectedIndexChanged(object o, Telerik.WebControls.RadComboBoxSelectedIndexChangedEventArgs e)
{
Label1.Text = String.Format("Currently selected item: '{0}'. Previosly selected item: '{1}'", e.Text, e.OldText);
}
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| VB.NET |
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Private Sub RadComboBox1_SelectedIndexChanged(ByVal o As Object, ByVal e As Telerik.WebControls.RadComboBoxSelectedIndexChangedEventArgs)
Label1.Text = String.Format("Currently selected item: '{0}'. Previosly selected item: '{1}'", e.Text, e.OldText)
End Sub
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