sorting of pagechildren in c - API Questions

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Peter S 64 posts 106 karma points

Oct 28, 2009 @ 17:17
0

Sorting of page.Children in C#

API Questions
Hi,

Is there an easy way to sort the children of a node when using custom user controls in C#? In the demo videos I've seen sorting is easily done in XSLT, but I haven't been able to find a way to do this in C#.

This is the code I'm using to loop through the childnodes:
```
 Node curPage = Node.GetCurrent();
 foreach (Node page in curPage.Children)
 {
    //do something
 }
```
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Chris Koiak 700 posts 2626 karma points

Oct 28, 2009 @ 18:51

1

I would suggest you look into Linq2Umbraco. In it's simplest form it's a linq wrapper for accessing the node/xml objects.


http://www.aaron-powell.com/blog/october-2009/a-developers-guide-to-linq-to-umbraco---part-0.aspx

You'll be able to use the full power of linq, including sorting.

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Peter S 64 posts 106 karma points

Oct 28, 2009 @ 20:12

0

Thanks. I'll give that a try. Was afraid I had to wait till Umbraco 4.1 to be able to use Linq :)

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Peter S 64 posts 106 karma points

Oct 28, 2009 @ 20:50

0

Or is this only working with version 4.1? In that case I might have to upgrade from the current 4.0 version...

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Dirk De Grave 4541 posts 6021 karma points MVP 3x admin c-trib

Oct 28, 2009 @ 22:08

0

Last assumption is the correct one, Linq2umbraco only from v4.1 release on.

Cheers,

/Dirk

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Dirk De Grave 4541 posts 6021 karma points MVP 3x admin c-trib

Oct 28, 2009 @ 22:10

0

Although some spicy lambda expression would do great as well.

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Aaron Powell 1708 posts 3046 karma points c-trib

Oct 28, 2009 @ 22:33

2

I strongly recommend you do not enumorate through the Children collection of an object in v4.0.

It's not a huge problem if you're using Node, but if you're using anything such as Media, Document, DocumentType, etc you will access the DB for every single iteration, since it returns an array.

It's always best to store the output of the property in a local variable before iterating.

4.1 has addressed this child problem *to a certain degree*.

But LINQ to Umbraco is just so much hotter ;)

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Peter S 64 posts 106 karma points

Oct 29, 2009 @ 12:05

0

/cheer

Man, this is so much better. Took me a little while to get it working, because I just had the website running on our server that didn't have Visual Studio installed, so I kept getting the ReflectionTypeLoadException. But now I have it all working, and I can sort with Linq.

Thanks all. And yes, Linq is hot :)TTitle is required

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Chad Rosenthal 272 posts 474 karma points

Nov 04, 2009 @ 18:52

0

Just out of curiosity, if Linq is not an option for us, is there a way to sort items in c#?

I'm mainly dealing with extending the autofolders program. The problem is that when you create a new folder, it isn't always in date order. The folders are created in the order that they were created and not necessarily in date order. It would be nice that when it adds in, that it automatically sorts them correctly.

Problem is, I'm trying to do it in a 2.0 environment. I know that you can add Linq to 2.0 without updating to 3.5 by adding the assemblies to your project, but I am curious if it can be done without Linq.

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Aaron Powell 1708 posts 3046 karma points c-trib

Nov 04, 2009 @ 22:42

1

Arrays are sortable, they always have been - http://msdn.microsoft.com/en-us/library/system.array.sort.aspx

But as I said, make sure you create a local variable otherwise you'll be doing a hell of a lot of db access

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dennish 17 posts 41 karma points

Dec 04, 2009 @ 15:38

1

DataView dataView = new DataView(node.ChildrenAsTable());
dataView.Sort = " Date ASC";
foreach (DataRowView view in dataView)

{
Response.Write(view["NodeName"] + "<br />");
}

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Sorting of page.Children in C#