如何使用List< T>在xaml中? [英] how use List<T> within xaml?

问题描述

因此，我非常确定在定义部分中需要包括以下内容:

So I am pretty sure that up in the definition part I need to include something along the lines of:

xmlns:s="clr-namespace:System.Collections.Generic;assembly=?????" 

但是我只是不知道该用???代替什么.

but I just do not know what to put in place of the ???'s.

我要用的代码是这样的:

What I want to do with the code is this:

<UserControl.DataContext>
    <ObjectDataProvider 
          MethodName="CreateNodes"
          ObjectType="{x:Type local:TreeViewModel}" >
        <ObjectDataProvider.MethodParameters>
            <s:List<T>>
                  {Binding Nodes}
            </s:List<T>>
        </ObjectDataProvider.MethodParameters>
    </ObjectDataProvider>
</UserControl.DataContext>

这样，当我进行objectDataProvider调用时，可以将列表传递给它正在调用的方法(CreateNodes)...

So that when I make the objectDataProvider call, I can pass the list in to the method that it is calling (CreateNodes)...

我该怎么做?

谢谢！

编辑-可以解决吗?

我只是将其放在方法中，而不是传递列表，它只是一个应用程序变量...我不知道应用程序变量是否不好

I just put this in the method, instead of passing in the list, it is just an app variable...I dont know if app variables are bad though

  List<TNode> existingNodes;

  if (Application.Current.Properties.Contains("ExistingNodes")) existingNodes = Application.Current.Properties["ExistingNodes"] as List<TNode>;
  else existingNodes = new List<TNode>();

推荐答案

XML名称空间声明的assembly部分将是mscorlib.

The assembly part of the XML namespace declaration would be mscorlib.

但是无论如何，XAML不支持泛型(*)，所以您不能这样做.相反，您可以创建一个继承List<T>的类并在XAML中使用它:

But anyway, XAML doesn't support generics (*), so you can't do it. Instead, you could create a class that inherits List<T> and use it in XAML:

class ListOfFoo : List<Foo>
{
}

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(1)XAML 2009中实际上支持泛型 ，但是编译后的XAML中不支持大多数XAML 2009 .有关更多信息，请参见此问题.

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(1) Actually generics are supported in XAML 2009, but most of XAML 2009 is not supported in compiled XAML. See this question for more information.

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