订购的ObservableCollection< T>而无需创建一个新的 [英] Order a ObservableCollection<T> without creating a new one

问题描述

我有下面的代码重新整理一个的ObservableCollection< T> 系列：

 列表=新的ObservableCollection<&SOMETYPE GT;（list.OrderBy（C => c.Ordinal））; 
  

这个代码的工作，但我不喜欢那个新涉及的事实。有没有一种方法，我可以改变的内部元素顺序的ObservableCollection< T> 集合，而无需创建一个新的

<？ p>谢谢，

解决方案

由于排序依据也是新闻了一个数组以配合您的收藏，和其他几个对象的大小，你已经两个选择：

1. 放弃对LINQ的OrderBy干脆写自己的排序执行就地使用Move方法在您的ObservableCollection排序。


2. 等到当前的实现变得有问题再申请1。

别担心，newing东西了没那么可怕。 LINQ做这一切的时候。除非这是一个瓶颈，一切都很好。除非有令人信服的证据表明在地方真的会加快展会排序，那么这里是没有问题的。

I have following code to re-order a ObservableCollection<T> collection:

list = new ObservableCollection<SomeType>( list.OrderBy( c=>c.Ordinal ) );

This code works, but I don't like the fact that "new" is involved. Is there a way I can change the internal element order of a ObservableCollection<T> collection without creating a new one?

Thanks,

解决方案

Given that OrderBy also news up an array to match the size of your collection, and several other objects, you've two choices:

1. Give up on LINQ OrderBy altogether and write your own sort that performs in-place sorting over your ObservableCollection using the Move method.
2. Wait until the current implementation becomes problematic then apply 1.

Don't worry, newing stuff up isn't so terrible. Linq does it all the time. Unless it's a bottleneck, all is good. Unless there's compelling evidence that sorting in-place will really speed up the show, then there's no problem here.

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