ASP "Validation Requires Jquery"

Question

So I'm basically making a webform probject, But I try to add a field validator to a text box, I've created one on another project but it doesn't request anything it just works on my other one without any errors

But in webforms it says this: http://prntscr.com/3jeanf

Here is my Validation

<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server"    ControlToValidate="txtReferenceNumber"  CssClass="ErrorMessage" ErrorMessage="Must Enter Reference Number!" EnableClientScript="true">Must Enter Reference Number!</asp:RequiredFieldValidator>

Answer 1

Try this, from WebForms UnobtrusiveValidationMode requires a ScriptResourceMapping for jQuery:

Remove below in web.config if you have

<add key="ValidationSettings:UnobtrusiveValidationMode" value="WebForms" />

or

registering jQuery in Global.asax in the Application_Start event like this:

ScriptManager.ScriptResourceMapping.AddDefinition("jquery", 
    new ScriptResourceDefinition
{
Path = "~/scripts/jquery-1.7.2.min.js",
DebugPath = "~/scripts/jquery-1.7.2.min.js",
CdnPath = "http://ajax.aspnetcdn.com/ajax/jQuery/jquery-1.4.1.min.js",
CdnDebugPath = "http://ajax.aspnetcdn.com/ajax/jQuery/jquery-1.4.1.js"
});