从静态扩展 XAML 中检索值 [英] Retrieving value from static extension XAML

问题描述

如何从静态扩展中检索值 (Int32.MaxValue):

How do I retrieve the value (Int32.MaxValue) from the static extension:

    <x:Static
        x:Key="TooltipTimeout"
        Member="s:Int32.MaxValue"
        />

...

<blablalba TooltipService.ShowDuration="{StaticResource TooltipTimeout}"/> <-- 顺便说一下，这不起作用

<blablalba TooltipService.ShowDuration="{StaticResource TooltipTimeout}"/> <-- this does not work by the way

推荐答案

在WPF中，你可以直接访问静态成员，像这样，

In WPF, You can access static member directly, like this,

<TextBlock TooltipService.ShowDuration="{x:Static s:Int32.MaxValue}"/> 

但是，您不能在 Silverlight 中执行相同操作，因为它不起作用.在silveright中，您必须编写一个包装类，如下所示，

However, you cannot do the same in Silverlight, as it wouldn't work. In silveright, you've to write a wrapper class, like this,

public class StaticMemberAccess
{
      public int Int32Max { get { return Int32.MaxValue; } }
      //define other wrapper propeties here, to access static member of .Net or your classes
}

然后在 XAML 中执行此操作，

Then do this in XAML,

<UserControl.Resources>
   <local:StaticMemberAccess x:Key="SMA"/>
</UserControl.Resources>

<TextBlock TooltipService.ShowDuration="{Binding Source={StaticResource SMA}, Path=Int32Max}"/> 

.

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