How to pass ObjectId from MongoDB in MVC.net

Use a custom model binder like this ... (working against the offical C# MongoDB driver)

protected void Application_Start(){    ...    ModelBinders.Binders.Add(typeof(ObjectId), new ObjectIdModelBinder()); }public class ObjectIdModelBinder : DefaultModelBinder{    public override object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)    {        var result = bindingContext.ValueProvider.GetValue(bindingContext.ModelName);        if (result == null)        {            return ObjectId.Empty;        }        return ObjectId.Parse((string)result.ConvertTo(typeof(string)));    }}

I Use following

public class ObjectIdModelBinder : DefaultModelBinder{    public override object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)    {        string value = controllerContext.RouteData.Values[bindingContext.ModelName] as string;        if (String.IsNullOrEmpty(value)) {            return ObjectId.Empty;        }        return new ObjectId(value);    }}

and

protected void Application_Start()    {        ......        ModelBinders.Binders.Add(typeof(ObjectId), new ObjectIdModelBinder());     }

almost forgot, make URLs from ObjectId.ToString()

I am not familiar with the ObjectId type but you could write a custom model binder that will take care of converting the id route constraint to an instance of ObjectId.