c# - required attribute not working in asp.net mvc

Question

I have a simple strongly-typed view.

@model GoldForGold.Models.LogonModel
@{
    ViewBag.Title = "Logins";
    Layout = "~/Views/Shared/_Layout.cshtml";
}

Logins
@using (Html.BeginForm()) {

Account Information
@Html.LabelFor(m => m.UserName)
@Html.TextBoxFor(m => m.UserName, new { id = "txtUserName" })
@Html.ValidationMessageFor(m => m.UserName)
@Html.LabelFor(m => m.Password)
@Html.PasswordFor(m => m.Password, new { id = "txtPassword" })
@Html.ValidationMessageFor(m => m.Password)
@Html.CheckBoxFor(m => m.RememberMe)
@Html.LabelFor(m => m.RememberMe)

<input type="submit" value="Log On" onclick="getcredentials()" />
}

Model code is here.

public class LogonModel
{
    [Required(ErrorMessage="please enter username")]
    [Display(Name = "User name")]
    public string UserName { get; set; }

    [Required]
    [DataType(DataType.Password)]
    [Display(Name = "Password")]
    public string Password { get; set; }

    [Display(Name = "Remember me?")]
    public bool RememberMe { get; set; }
}

I see nothing is happening even when I do not enter username and password.

Answer 1

Here is the complete solution:

1. Add the following scripts to your view:

   <script src='@Url.Content("~/Scripts/jquery-1.8.2.js")' type='text/javascript'></script>    
   <script src='@Url.Content("~/Scripts/jquery.validate.js")' type='text/javascript'>         </script>
   <script src='@Url.Content("~/Scripts/jquery.validate.unobtrusive.js")' type='text/javascript'></script>
   

2. Enable Validation in Web.Config:

   <appSettings>
   <add key="ClientValidationEnabled" value="true" />
   <add key="UnobtrusiveJavaScriptEnabled" value="true" />
   </appSettings>
   

3. Add validation element in the view:

   @Html.ValidationMessageFor(model => model.UserName)
   

4. Add Required attribute to you model`s element.

   [Required(ErrorMessage="please enter username")]
   public string UserName { get; set; }