How to Html.ValidationMessageFor and popup window

Question

I am trying a register with popup window and ı am using Html.ValidationMessageFor but when I try to register under textboxfor there is nothing showing. can you help me ?

these are my code                        

Answer 1

You can use jQuery Validation in order to validate form fields as shown below:

Step 1: Add the necessary DataAnnotations to the related Model properties as shown below:

[Required(ErrorMessage = "Required field")]
[MaxLength(50)]
[Display(Name = "Lab")]
public string Name { get; set; }

Step 2: Add the necessary script files to the _Layout or View page:

<script src="/Scripts/jquery.validate.js"></script>
<script src="/Scripts/jquery.validate.unobtrusive.js"></script>

Step 3: Use the ValidationMessageFor annotation as shown below. Note that you can use some properties i.e. maxlength, etc. also:

@Html.TextBoxFor(m => m.Name, new { maxlength = "50", @class = "form-control" })
@Html.ValidationMessageFor(m => m.Name, null, new { @class = "field-validation-error" })