Hi PRABAKAR,
Please have a look into the following code snippet which works fine at my end.
ASPX:
<
telerik:RadComboBox
ID
=
"RadComboBox1"
runat
=
"server"
CheckBoxes
=
"true"
EnableCheckAllItemsCheckBox
=
"true"
>
<
Localization
CheckAllString
=
"All"
/>
<
Items
>
<
telerik:RadComboBoxItem
Text
=
"Item1"
/>
<
telerik:RadComboBoxItem
Text
=
"Item2"
/>
<
telerik:RadComboBoxItem
Text
=
"Item3"
/>
<
telerik:RadComboBoxItem
Text
=
"Item4"
/>
</
Items
>
</
telerik:RadComboBox
>
Please provide your code if it doesn't help.
Thanks,
Shinu.