MVC 4部分模型验证

Question

I have a standard EF model with data annotations. I have two columns. The first is an ID while the other is a boolean. In the database both are non nullable. They are both flagged however with the "Hidden" attribute. This all works great for the UI until I go to post the form back to the server.

The model fails to validate. I tried Steven Sanderson's suggestion to create an action filter however it failes to remove the values I do not return to the server for validation. I ended up reverting to the following which I think is quite ugly:

try
{
    ModelState["LocationId"].Errors.Clear(); -- Really ugly!
    ModelState["IsEnabled"].Errors.Clear(); -- Seems really trashy to do it this way
    if (ModelState.IsValid)
    {
        location.IsEnabled = true; -- This will eventually move to my model definition
        _repo.InsertOrUpdate(location);
        _repo.Save();

        return RedirectToAction("Index");
    }
    return View();
}
catch (DataException ex)
{
    ModelState.AddModelError("dataError", ex);
    return View();
}

Does anyone have any other suggestions or ideas on how to clean this up or create a better solution?

Thanks

Answer 1

You could use a viewmodel and map the data you want to show/have the user input from your entity to your viewmodel. On post you would then validate the input data on the viewmodel, map it back to the entity and save it to your database.

Another way would be to remove the [Required] data annotations from your ID and boolean attributes, this way ModelState.IsValid should not return false