WebForm 4.5 Development, many controls by default enable the unobtrusive Validationmode (the so-called unobtrusive Validation, is an implicit authentication method) of the properties (and jquery reference), But it is not assigned, programmer must be set manually. For example, the various validator used for data validation (the RequiredFieldValidator control used today), and the authorization and authenication settings, Because jquery is required to be called on the front-end for authentication, unobtrusive Validationmode is the default enable. If this property is not configured, an error is generated.
Locate the appropriate jquery (ASPNET.SCRIPTMANAGER.JQUERY.DL) file to copy it to the Bin folder.
Since I am a new empty Web application, I did not add jquery. We can paste the corresponding jquery file into the folder mentioned above by creating a new non-empty Web application.
WebForms Unobtrusivevalidationmode needs "jquery" scriptresourcemapping