Setting Verification Attributes on Properties

The LearningResources get installed different places depending on what OS you're using. If you're using Windows XP they should still be under C:\Program Files\IdeaBlade DevForce.  But wherever they get installed, you should be able to get to them via the IdeaBlade DevForce\Documentation\Learning Resources option on the Windows Start menu.

It is also possible to elect not to install them when you install the product, but I guess you'd know if you'd done that.

What version are you running? The validation folder is currently named 070_Validation, and it contains a Samples folder that in turn contains folders with Winforms, WPF, and Silverlight code solutions that implement validation.

However, all of those except the Silverlight solution have been there for a pretty good while, so maybe something happened with your installation?

Version difference may explain the compile problems, too.

You can add verifiers using code as illustrated in the Silverlight, WPF, and WinForm code samples in the Validation section of the Learning Resources.

You can add attributed verifiers to generated properties in a metadata "buddy class" for your business class.  Below, I've added the buddy class into the same file (and namespace statement block) as the developer partial class.

The developer partial class needs to be marked with the MetadataType attribute to name the buddy class that contains the additional metadata.


...
using IbVal = IdeaBlade.Validation;
using DataAnnot = System.ComponentModel.DataAnnotations;

namespace DomainModel {
  [DataAnnot.MetadataType(typeof(EmployeeMetadata))]
  public partial class Employee  {

  ...

  }

  /// <summary>
  /// The buddy class for Employee.
  /// </summary>
  public static class EmployeeMetadata {

    /// <summary>
    /// Override city to make it required.
    /// </summary>
    [IbVal.RequiredValueVerifier()]
    public static string City;

    /// <summary>
    /// Restrict the string length more than in the generated verifier
    /// </summary>
    [IbVal.StringLengthVerifier(MaxValue = 10, IsRequired = true)]
    public static string FirstName;
  }
}
 

Wow, there's a lot in the Verification engine. After reading through the Developer Manual I confused on this point:

There is lots of discussion about the Verifier attributes - and examples of these attributes on the properties in the generated class (.Designer.cs).

But that is re-generated everytime the ObjectMapper runs.

I can't see how to get these attributes onto the properties in a safe place.

I'm sure I'm missing something simple here. Any help?
Also, are there some concise code examples of this in action within a project? If so where. The learning resources just include the chapter in the Dev Manual and the PPT.

Thanks.