MetadataType and client validation in ASP.NET MVC 2

Question

Inherited properties and MetadataType does not seem to work with client side validation in ASP.NET MVC 2.

The validation of our MetadataTypes work a

Answer 1

Are you sure? I've got a ASP.NET MVC 2 site set up as you describe and I have client side validation of both required and regex based attributes that works fine. It doesn't work with my own validators (that derive from ValidationAttribute) at the moment though:

[MetadataType(typeof(AlbumMetadata))]
public partial class Album {}

public class AlbumMetadata {
    [Required(ErrorMessage = "You must supply a caption that is at least 3 characters long.")]
    [MinLength(3, ErrorMessage = "The caption must be at least {0} characters long.")]
    [RegularExpression(@".{3,}")]
    public string Caption { get; set; }
}

(MinLength basically provides a more obvious way to see what's happening in the Regular Expression attribute, which was added for testing)

I then have the following in my view:

<%= Html.ValidationSummary("Edit was unsuccessful. Please correct the errors and try again.") %>
<% Html.EnableClientValidation(); %>
<% using (Html.BeginForm()) {%>

    
Album details
    

        Album caption:
        <%= Html.TextBox("Caption", Model.Caption, new { @class = "textbox" })%>
        <%= Html.ValidationMessage("Caption", "*") %>
        
 
    
    

        Is this album public:
        <%= Html.CheckBox("IsPublic", Model.IsPublic) %>
    
    

        
    

<% } %>

Which results in the following being output to the client below the form tags (formatted for clarity):