public Edit(int? id){ /* Codes */ }

[HttpPost]
public Edit(Item model){ /* Codes */ }

I retrieve a copy of Item in the first Edit method, which would contain a value for ItemID. But when it gets to the HttpPost method, the id value's lost.

If switched to

public Edit(int? ItemID){ /* Codes */ }

[HttpPost]
public Edit(Item model){ /* Codes */ }

this way ItemID can be persisted in the Item model. But is this a good way to handle it? Will ASP.NET MVC always be able to know that it needs to plug "ItemID" into Item? and are there other ways to persist the ID value? Thanks.