asp.net mvc - Textbox validation in MVC2 -


I've added the required attribute for one of the properties of the model class - 

 < Code> [required (error message = "user id should not be blank")] [DisplayName ("username")] public string username {get; Set; }

Inside my view, which inherits the class of properties above, I have tried to apply validation in a text box as follows - 

  & lt;% = Html.TextBoxFor (model = & gt; Model.UserName, new {@class = "login-input", @ name = "UserName"})%> & Lt;% = HTML.ValidationMessageFor (Model = & gt; Model.UserName)% & gt;

But when I run this app, clicking on a button without clicking on the button; Do not I get the text box valid?

Can anyone tell me what is the reason that the text box verification can be stopped?

/ Strong>. Model => User Name> for model User Name


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