Use the Text property of the validator and set the display to dynamic, e.g.
<asp:RequiredFieldValidator ID="valTextBox1" runat="server"
ErrorMessage="You have to enter a text"
ControlToValidate="txtBox1" Text="*" Display="dynamic">
</asp:RequiredFieldValidator>
This will show a red "*" when the user tabs off the textbox without entring
any value.
The ErrorMessage property will then display the detailed message if you have
a ValidationSummary control defined on the form.
http://msdn.microsoft.com/library/d...ntrolsbasevalidatorclasserrormessagetopic.asp
A quote from the above link:
"Use the ErrorMessage property to specify the text to display in the
validation control when validation fails. This text is also included in the
ValidationSummary control, if one is placed on the Web page.
It is possible to display different text for the validation control and the
ValidationSummary control. Use the Text property to specify the text to
display in the validation control.
Note If the Text property is set, that text will override the text
specified in the ErrorMessage property and appear in the validation control.
However, the text specified by the ErrorMessage property always appears in
the ValidationSummary control."
