WPF 列表<t> 排序
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/18525253/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
WPF list<t> sort
提问by Drew
my first post here.
我在这里的第一篇文章。
i have a list"<"frameworkelement> that i'm populating with a select process. each frameworkelement has a uid that holds its ZOrder.
我有一个列表"<"frameworkelement>，我正在用一个选择进程填充它。每个框架元素都有一个 uid 来保存它的 ZOrder。
i need to sort these by the ZOrder from lowest to highest. i can get this using a listbox and adding the Uid's like this:
我需要按 ZOrder 从低到高对这些进行排序。我可以使用列表框并像这样添加 Uid 来获取它：
//Add Object Uid's
ListBox lstTempOrder = new ListBox();
foreach(FrameworkElement feObject in MainWindow.Data.SelectedObjects)
{
lstTempOrder.Items.Add(feObject.Uid);
}
//Reorder from 0 to above of the ZIndexes
lstTempOrder.Items.SortDescriptions.Add(new System.ComponentModel.SortDescription("", System.ComponentModel.ListSortDirection.Ascending));
but i need to do this with a List"<"FrameWorkElement> and Sort.
但我需要用 List"<"FrameWorkElement> 和 Sort 来做到这一点。
Here is the code where i populate the List"<"T> (SelectedObjects and CopyObjectsCollections are List"<"FrameWorkElement>" lists.
这是我填充 List"<"T> (SelectedObjects 和 CopyObjectsCollections 是 List"<"FrameWorkElement>" 列表的代码。
foreach(FrameworkElement feObject in MainWindow.Data.SelectedObjects)
{
MainWindow.Data.CopyObjectsCollection.Add(feObject);
}
i've looked at CollectionViewSource and IComparer but i can't really make any sense of it.
我看过 CollectionViewSource 和 IComparer ，但我真的无法理解它。
采纳答案by Sheridan
I might have miss-read your question, but if you just want to sort your List<T>, then why don't you just use the LinQOrderBymethod?
我可能没读懂你的问题，但如果你只是想对你的 进行排序List<T>，那你为什么不直接使用这个LinQOrderBy方法呢？
MainWindow.Data.CopyObjectsCollection =
MainWindow.Data.CopyObjectsCollection.OrderBy(f => f.Uid).ToList();
If that sorts it the wrong way round for your requirements, then you can use this:
如果按照您的要求对它进行了错误的排序，那么您可以使用它：
MainWindow.Data.CopyObjectsCollection =
MainWindow.Data.CopyObjectsCollection.OrderByDescending(f => f.Uid).ToList();
UPDATE >>>
更新 >>>
OrderByis a LinQextension method. Add using System.Linq;at the top of your class to use it. frelates to an instance of your FrameworkElementobject. The above lambda expression basically means 'sort using the Uidproperty values'.
OrderBy是一种LinQ扩展方法。添加using System.Linq;在您班级的顶部以使用它。f与FrameworkElement对象的实例相关。上面的 lambda 表达式基本上意味着“使用Uid属性值排序”。
UPDATE 2 >>>
更新 2 >>>
The OrderBymethod does notalter the original collection... that is why my example sets the collection to the result of the OrderBymethod. See this basic example:
该OrderBy方法并没有改变原始集合...这就是为什么我的例子中，收集组的结果OrderBy的方法。请参阅此基本示例：
List<FrameworkElement> elements = new List<FrameworkElement>();
elements.Add(new FrameworkElement() { Uid = "Object1003-1" });
elements.Add(new FrameworkElement() { Uid = "Object1002-2" });
elements.Add(new FrameworkElement() { Uid = "Object1002-1" });
elements.Add(new FrameworkElement() { Uid = "Object1001-1" });
elements.Add(new FrameworkElement() { Uid = "Object1001-3" });
elements.Add(new FrameworkElement() { Uid = "Object1001-2" });
string result = string.Join(", ", elements.Select(f => f.Uid));
elements = elements.OrderBy(f => f.Uid).ToList();
string orderedResult = string.Join(", ", elements.Select(f => f.Uid));
By comparing the values of resultand orderedResultyou can see that this orders them perfectly.
通过比较的价值观result和orderedResult你可以看到，这令他们完美。
UPDATE 3 (and hopefully the LAST one) >>>
更新 3（希望是最后一个）>>>
Dude, you need to learn about Lambda expressions... take a look at the Lambda Expressions (C# Programming Guide)page at MSDN for more information.
伙计，您需要了解 Lambda 表达式...查看MSDN上的Lambda 表达式（C# 编程指南）页面以获取更多信息。
elements = elements.OrderBy(f => f.Uid).ToList();
The fin this Lambda expression is declared inthis expression before the '=>'. It is fairly standard to name these parameters with one letter like Exceptions, but we couldname it anything:
在f这个Lambda表达式声明中的“在此之前的表达=>”。用一个字母来命名这些参数是相当标准的Exceptions，但我们可以任意命名：
elements = elements.OrderBy(frameworkElement => frameworkElement.Uid).ToList();
