By default, page validation is performed when an System.Web.UI.HtmlControls.HtmlAnchor control is clicked. Page validation determines whether controls that are associated with a validation control on the page all pass the validation rules that are specified by the validation control.

You can specify or determine whether validation is performed on both the client and the server when an System.Web.UI.HtmlControls.HtmlAnchor control is clicked by using the HtmlAnchor.CausesValidation property. To prevent validation from being performed, set the HtmlAnchor.CausesValidation property to false.