or
The error will not disappear until I tried to select one of the item inside the dropdownlist.
<
telerik:RadComboBox
ID
=
"radProcessLn"
runat
=
"server"
AllowCustomText
=
"true"
EnableScreenBoundaryDetection
=
"False"
EmptyMessage
=
"Insert/select"
/>
<
asp:RequiredFieldValidator
ID
=
"rfvProcessLn"
ControlToValidate
=
"radProcessLn"
ErrorMessage
=
"Please enter Process Ln / Operation"
InitialValue
=
""
ValidationGroup
=
"Submit"
CssClass
=
"mandatory"
runat
=
"server"
Display
=
"Dynamic"
/>