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copied!<p>As you told me you are using MVC, We have an <strong>Remote</strong> Validation in MVC which we can apply in our <strong>Model Class Properties</strong>. </p> <p>Let me show you how:</p> <pre><code>[Required] [Remote("IsUserIDExist", "Account", ErrorMessage = "User ID Already Exist")] [Display(Name = "Enter User ID")] public string User_username { get; set; } </code></pre> <p>This is my Property which is in <strong>Account.cs</strong> Model Class.</p> <p><strong>IsUserIDExist</strong> is the Action in <strong>Account</strong> Controller.</p> <p>Now let me show you <strong>IsUserIDExist</strong> Action.</p> <pre><code>public ActionResult IsDomainIDExist(string User_username) { var users = from s in db.CreateUsers where s.User_username == User_username select s; if (users != null) { if (users.Count() != 0) { return Json(false, JsonRequestBehavior.AllowGet); } else { return Json(true, JsonRequestBehavior.AllowGet); } } else { return Json(true, JsonRequestBehavior.AllowGet); } } </code></pre> <p>This Code speaks it self.I guess there is no need for any explanation.</p> <p>Last but not least.</p> <p>You need to add these javascript files to work with Remote Validation</p> <pre><code><script src="@Url.Content("~/Scripts/jquery.validate.min.js")" type="text/javascript"> </script> <script src="@Url.Content("~/Scripts/jquery.validate.unobtrusive.min.js")" type="text/javascript"></script> <script src="@Url.Content("~/Scripts/jquery-1.4.4.min.js")" type="text/javascript"></script> <script src="@Url.Content("~/Scripts/jquery.json-2.2.min.js")" type="text/javascript"></script> <script src="@Url.Content("~/Scripts/jquery.validate.js")" type="text/javascript"></script> </code></pre> <p></p> <p>Hope this is what you were looking for.</p>

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