Check that you have the your CustomValidator
property ValidateEmptyText
set to true
so that empty text will be validated. Then you will not need the RequiredFieldValidator
anymore.
EDIT: I took your code and copy and pasted it into an empty project and it works as expected. There must be something you have not posted, or is posting incorrectly, that we are not aware of. Is there anything else that affects the button that is triggering the validation or the validation controls themselves?
EDIT: Here is the exact code (it's in a content page):
aspx page:
<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">
<asp:TextBox ID="txtPRI" runat="server" Width="295" /><br />
<asp:RequiredFieldValidator ID="RequiredFieldValidator1" display="Dynamic" CssClass="leftAlign" SetFocusOnError="true" runat="server" controltovalidate="txtPRI" errormessage="Please enter your PRI" />
<asp:CustomValidator runat="server" id="cusCustom" controltovalidate="txtPRI" onservervalidate="cusCustom_ServerValidate" Enabled="true" ValidateEmptyText="true" display="Dynamic" CssClass="leftAlign" SetFocusOnError="true" errormessage="The text must be exactly 8 characters long!" />
</asp:Content>
.cs page (empty Page_Load
):
protected void cusCustom_ServerValidate(object sender, ServerValidateEventArgs e)
{
// put a break point here and it stops on it
if (e.Value.Length == 8)
e.IsValid = true;
else
e.IsValid = false;
}
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