ASP.NET MVC Bind Attribute on Method instead of Parameter

Question

I'm aware that you can do this:



public ActionResult DoSomething([Bind(Exclude = "CreationDate")] Item item)
{ /*...*/ }

However, I found that you can also attach that Bind attribute on top of the method, e.g.



[Bind(Exclude = "CreationDate")] 
public ActionResult DoSomething(Item item)
{ /*...*/ }

Does this have the exact same effect? What if you bind to more than one parameter?

I can't get the second example ([Bind] on the method itself) to compile. Are you sure you're using System.Web.Mvc.BindAttribute instead of another custom attribute called [Bind] with looser usage restrictions? — Levi
– Levi, Commented Sep 14, 2009 at 18:19
Bind attribute just work on the class and parameter declarations — Barbaros Alp
– Barbaros Alp, Commented Feb 18, 2010 at 14:44
It looks like you can apply the Bind attribute to individual parameters. For example, if you had a view that included two instances of Person, one prefixed with "Manager" and the other with "Lackey", you could use something like: public ActionResult Flog([Bind(Prefix="Manager")] Person manager, [Bind(Prefix="Lackey")] Person designatedVictim) — HABO
– HABO, Commented Oct 27, 2011 at 19:37

Robert Harvey · Accepted Answer · 2023-07-11 15:09:45Z

6

Note that the Bind attribute is no longer applicable to functions; it is only valid attached to a parameter or class. When attempting to utilize the attribute on a method, an error presents: Attribute 'Bind' is not valid on this declaration type. It is valid on 'class, parameter' declarations.

The second form is the one that I have seen more commonly. To my knowledge, both forms do exactly the same thing.

The Exclude option takes a comma-separated list of attributes. The Exclude list simply excludes one or more parameters from binding; it has no effect on the remaining parameters.

Example:

[Bind(Exclude="ID, Name")]

edited Jul 11, 2023 at 15:09

answered Sep 14, 2009 at 2:23

Robert Harvey

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1 Comment

amit_g Over a year ago

The second form won't compile. The Bind attribute's allowed targets are class and parameters. BindAttribute

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