IUpdateable for Linq To Sql

IUpdateable for Linq To Sql | Tmao Coders

IUpdateable for Linq To Sql | Tmao Coders — Thu, 06 Nov 2008 08:21:05 GMT

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re: IUpdateable for Linq To Sql

rogerj — Thu, 06 Nov 2008 17:36:26 GMT

Andy,

Thanks very much for the IUpdatable implementation. It's a very welcome occurrence to finally have data-source partity with Entity Framework for Astoria.

Roger Jennings

re: IUpdateable for Linq To Sql

Benjamín Eidelman — Fri, 07 Nov 2008 15:28:47 GMT

Thanks for sharing this!

Have you done any performance test yet?

If you had, have you tried improving it by avoiding some of the Reflection calls? because those they use to be expensive, and caching would be very straight-forward in this case:

e.g. create a Dictionary<string,ITable> to cache this:

(ITable)this.GetType().GetProperty(containerName).GetValue(this, null)

re: IUpdateable for Linq To Sql

aconrad — Fri, 07 Nov 2008 23:15:16 GMT

I thought about caching the table mappings to avoid using reflection to much. I did not for a couple of reasons:

1) I wanted to make the code as simple and clean as possible.

2) Our use of the context in ADO.NET Data Services in the server is very short lived. For single CUD operations - there would be no saving. For multiple changes in a batch, there might be some perf

It might be an option to make this a static member and initialize only once. I might try that to see if there is a perf gain. Our experience is that this may help as a local optimization, but in the big picture (database, network, parsing) it makes very little difference.

IUpdateable for Linq To Sql - Make Linq to Sql a read/write data

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re: IUpdateable for Linq To Sql

Matthew Wills — Mon, 15 Dec 2008 01:56:44 GMT

Can you give us a 5-line explanation of what this exactly is for? For example, is there something that couldn't be done previously and now it can be? Is there a demo (zip file?) available showing the new 'features' this makes available / possible?

re: IUpdateable for Linq To Sql

aconrad — Tue, 16 Dec 2008 02:02:42 GMT

@Matthew Wills

This post will probably help.

http://blogs.msdn.com/aconrad/archive/2008/12/15/what-is-iupdatable-why-should-i-care.aspx