Model value not set when passing into View in ASP.NET MVC2

Stumped...

I have a few routes set up:

    Function AddUpdate(ByVal id As Long) As ActionResult
        Return View(New UPDATES With {.ID = id})
    End Function

    <HttpPost()> _
    Function AddUpdate(ByVal Update As UPDATES) As ActionResult
       //Do cool posted stuff here
    End Function

The type of the .ID is LONG.

When it runs the post function, the Update object's Update.ID is nothin开发者_StackOverflow中文版g.

My view doesn't alter the property, and I don't have any Helper methods attached to it in the view. Shouldn't it be sent back through to the post method?

Thanks - JB

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Is The id being sent back in the HTTP Post (using fiddler or firebug to see)?

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Are you actually passing the value back with POST, either through your route, or a form field? The ModelBinder can't bind values if it doesn't know where to look for them...