I’ve finally found an example of how to group by multiple values using LINQ:
IList doc_infos = new List();

doc_infos.Add(new doc_info { region = "UK", price = 100, currency = "US" });
doc_infos.Add(new doc_info { region = "US", price = 100, currency = "US" });

var docs = doc_infos.GroupBy(x => new { x.price, x.currency })
.Select(group => new { d = group.Key, Count = group.Count() });

For more examples, have a look here.

Here’s what I’ve learnt:
1. It’s implementation on the .net framework has changed a LOT! Most samples available are out of date and won’t compile

2. It’s potential is massive! For the first time, I can see Test Driven Development really working!

3. The current version does not work well with the .NET AJAX Toolkit controls

4. There are many parts to it! While the MVC Pattern sounds simple, it only works effectively with the Repository Pattern and Dependency Injection

Still, I’m hooked!

Imagine if Microsoft did this with Visual Studio???

Have a look!

Short version is that you include a form in your service. Start your service with a command line (ie. Service.exe -instance) and it runs from a form.

Cool eh?!

Well, that’s the case with this. It shows you how to do a drop down list in a grid view.

Rock on!

Christian

Tags: BlogDesk, C#, GridView