模型活页夹问题

Question

I have a read-only property on a viewmodel that calculates a value from various other properties. I do not want it to be read by the model binder on posts because not all of the source properties are available.

public class MyView
{
     public int MyReadOnlyProperty
     {
         get 
         {
             int result;
             //do stuff 
             return result;
         }
     }
}

I have added a [Bind(Exclude)] attribute to the controller method like this:

[HttpPost]
public ActionResult Create([Bind(Exclude = "MyReadOnlyProperty")]MyView viewModel)
{
}

However, the binder still reads the excluded property. So when I post back to the above controller method, the MyReadOnlyProperty getter is executed; but before the controller method is called. It seems strange that the binder is reading properties on a post: I would expect it only to be setting them using form values.

Can anyone tell me how to avoid this?

Answer 1

Give a try like this :

[HttpPost]
public ActionResult Create(MyView viewModel)
{
   ModelState.Remove("MyReadOnlyProperty");
}

Hope it helps

---

Edit

[Bindable(false)]
public int MyReadOnlyProperty
     {
         get 
         {
             int result;
             //do stuff 
             return result;
         }
     }