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POValidation for unique username not working in ASP.NET MVC4
 

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    <p>I trying to validate username for uniqueness but due to some reasons its not working fine. I am doing it in the following way</p> <p><strong>MODEL</strong></p> <pre><code>public class System_User { public int Id { get; set; } [Required] public string FirstName { get; set; } [Required] public string LastName { get; set; } [Required] [Remote("doesUserNameExist", "System_User", HttpMethod = "POST", ErrorMessage = "User name already exists. Please enter a different user name.")] public string UserName { get; set; } [Required] [DataType(DataType.Password)] public string Password { get; set; } public bool IsAdmin { get; set; } } </code></pre> <p><strong>Controller</strong></p> <p>I have added the following code to my System_User Controller</p> <pre><code> [HttpPost] public JsonResult doesUserNameExist(string UserName) { var user = Membership.GetUser(UserName); return Json(user == null); } </code></pre> <p><strong>View</strong> I have the default create view generated by mvc with necessary references to jquery</p> <pre><code>@model WhiteBoard.Models.System_User @{ ViewBag.Title = "Create"; } &lt;h2&gt;Create&lt;/h2&gt; @using (Html.BeginForm()) { @Html.AntiForgeryToken() @Html.ValidationSummary(true) &lt;table class="userTable"&gt; &lt;tr&gt; &lt;td&gt; @Html.LabelFor(model =&gt; model.FirstName) &lt;/td&gt; &lt;td&gt; @Html.EditorFor(model =&gt; model.FirstName) @Html.ValidationMessageFor(model =&gt; model.FirstName) &lt;/td&gt; &lt;/tr&gt; &lt;tr&gt; &lt;td&gt; @Html.LabelFor(model =&gt; model.LastName) &lt;/td&gt; &lt;td&gt; @Html.EditorFor(model =&gt; model.LastName) @Html.ValidationMessageFor(model =&gt; model.LastName) &lt;/td&gt; &lt;/tr&gt; &lt;tr&gt; &lt;td&gt; @Html.LabelFor(model =&gt; model.UserName) &lt;/td&gt; &lt;td&gt; @Html.EditorFor(model =&gt; model.UserName) @Html.ValidationMessageFor(model =&gt; model.UserName) &lt;/td&gt; &lt;/tr&gt; &lt;tr&gt; &lt;td&gt; @Html.LabelFor(model =&gt; model.Password) &lt;/td&gt; &lt;td&gt; @Html.EditorFor(model =&gt; model.Password) @Html.ValidationMessageFor(model =&gt; model.Password) &lt;/td&gt; &lt;/tr&gt; &lt;tr&gt; &lt;td&gt; @Html.LabelFor(model =&gt; model.IsAdmin) &lt;/td&gt; &lt;td&gt; @Html.EditorFor(model =&gt; model.IsAdmin) @Html.ValidationMessageFor(model =&gt; model.IsAdmin) &lt;/td&gt; &lt;/tr&gt; &lt;tr&gt; &lt;td colspan="2"&gt; &lt;input class="btn btn-success" type="submit" value="Create User" /&gt; &lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; } &lt;div&gt; &lt;p&gt; @Html.ActionLink("Back to List", "Index") &lt;/p&gt; &lt;/div&gt; @section Scripts { @Scripts.Render("~/bundles/jqueryval") &lt;script src="@Url.Content("~/Scripts/jquery.validate.min.js")" type="text/javascript"&gt;&lt;/script&gt; &lt;script src="@Url.Content("~/Scripts/jquery.validate.unobtrusive.min.js")" type="text/javascript"&gt;&lt;/script&gt; } </code></pre> <p>When I ran the application, it neither threw an exception nor the validation worked. </p> <p>May I know where am I making a mistake</p>
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