c# - 具有泛型的 WPF 自定义控件 - 可能吗？

Question

我想使用泛型创建自定义 WPF 控件:

public class MyGenericTypeControl<T> : ItemsControl 
{   
   // ...
}

这可能吗？在我最初的实验中，一旦我尝试在某处添加此控件，我就会遇到设计时/编译时 XAML 错误。这并不奇怪，因为构建我的自定义控件需要 XAML 不提供的额外信息。

有什么想法吗？

Answer 1

使用 x:TypeArguments 的支持有限

For XAML 2006 usage, and XAML that is used for WPF applications, the following restrictions exist for x:TypeArguments and generic type usages from XAML in general:

• Only the root element of a XAML file can support a generic XAML usage that references a generic type.
• The root element must map to a generic type with at least one type argument. An example is PageFunction<T>. The page functions are the primary scenario for XAML generic usage support in WPF.
• The root element XAML object element for the generic must also declare a partial class using x:Class. This is true even if defining a WPF build action.
• x:TypeArguments cannot reference nested generic constraints.