ASP.NET MVC

Re: UpdateFrom in MVC Preview 2

levib — Thu, 05 Nov 2009 08:48:36 GMT

MVC 2 Preview 2 model binders have built-in support for properties of type byte[] and System.Linq.Binary. I recommend using one of those instead of the UpdateFrom() extension method.

BTW - This thread is a year and half old. Please open a new thread if you have additional questions, or else they're likely to be overlooked by the community.

Re: UpdateFrom in MVC Preview 2

quentins — Thu, 05 Nov 2009 03:03:58 GMT

I was hoping MVC 2 would have fixed the problem with TimeStamps. Using either:

BindingHelperExtensions.UpdateFrom(e_UserAccount, Request.Form);

e_UserAccount.UpdateFrom(Request.Form);

They both blow up with an exception:

No type converter available for type: System.Byte[]

So a secondary question would be how do you add additional type converters especially one for byte[]

Re: UpdateFrom in MVC Preview 2

katokay — Thu, 13 Mar 2008 22:04:42 GMT

http://www.hanselman.com/blog/ImJustACavemanTheHanselmanCorollaryToTheClarkeWheelerLaws.aspx

Yes, I agree it has a nice ring to it.

Re: UpdateFrom in MVC Preview 2

kombatsanta — Wed, 12 Mar 2008 12:50:26 GMT

Hmmm... yeah. That worked for my Create method:

public void Create()

{

Product product = new Product();BindingHelperExtensions.UpdateFrom(product, Request.Form);

northwind.AddProduct(product);

northwind.SubmitChanges();

RedirectToAction("List");

}

But in my Add method I still have to do this:

public void Update(int id, string ProductName, int CategoryID, int SupplierID, Decimal UnitPrice)

{

Product product = northwind.GetProductById(id);product.ProductName = ProductName;

product.CategoryID = CategoryID;

product.SupplierID = SupplierID;

product.UnitPrice = UnitPrice;

northwind.SubmitChanges();RedirectToAction("List");

}

instead of this:

public void Update(int id)

{

Product product = northwind.GetProductById(id);BindingHelperExtensions.UpdateFrom(product, Request.Form);

northwind.SubmitChanges();

RedirectToAction("List");

}

Re: UpdateFrom in MVC Preview 2

nicosabena — Wed, 12 Mar 2008 11:02:17 GMT

It seems that you just need to change the line:

product.UpdateFrom(Request.Form);

to:

BindingHelperExtensions.UpdateFrom(product, Request.Form);

Re: UpdateFrom in MVC Preview 2

kombatsanta — Wed, 12 Mar 2008 09:17:26 GMT

So how would be the "correct" way to update an object? I mean instead of doing the following:

public void Create()

{

Product product = new Product();

product.UpdateFrom(Request.Form);

northwind.AddProduct(product);

northwind.SubmitChanges();

RedirectToAction("List");

}

You would do it like?

Re: UpdateFrom in MVC Preview 2

robconery — Tue, 11 Mar 2008 22:08:14 GMT

I like it - very nice - perhaps Request.Serialize() and Request.Deserialize(). This is why Phil and Eilon love me... I feel some proto-code coming...

Re: UpdateFrom in MVC Preview 2

katokay — Tue, 11 Mar 2008 13:39:29 GMT

Seems like it might be nice as Request.Form.DeserializeTo, Which would also allow for Request.QueryString.DeserializeTo, etc.

Re: UpdateFrom in MVC Preview 2

robconery — Tue, 11 Mar 2008 02:55:23 GMT

One of the things we wanted to do was move away from hanging any extensions off of Object (which is where UpdateFrom() used to live). It's now located in System.Web.Mvc.BindingHelperExtensions (which I think will get renamed) as a static method).

UpdateFrom in MVC Preview 2

AlexBecker — Tue, 11 Mar 2008 00:24:41 GMT

What happened to UpdateFrom in Preview 2?. How come it's not an extension method anymore? :S

Thx