WebForms UnobtrusiveValidationMode requires a ScriptResourceMapping for ‘jquery’. Please add a ScriptResourceMapping named jquery(case-sensitive)
You need a web.config key to enable the pre 4.5 validation mode. More Info on ValidationSettings:UnobtrusiveValidationMode: Specifies how ASP.NET globally enables the built-in validator controls to use unobtrusive JavaScript for client-side validation logic. Type: UnobtrusiveValidationMode Default value: None Remarks: If this key value is set to “None” [default], the ASP.NET application will use the pre-4.5 behavior (JavaScript inline in the … Read more