多次使用相同的 FrameworkPropertyMetaData

发布于 2024-10-28 07:48:41 字数 803 浏览 4 评论 0原文

我有 3 个依赖属性和一个 FrameworkPropertyMetadata，当我尝试在多个 DP 上使用元数据时，我遇到了崩溃。我不想有 3 个重复的元数据，有办法解决这个问题吗？

    static FrameworkPropertyMetadata propertyMetaData = new FrameworkPropertyMetadata("My Control", FrameworkPropertyMetadataOptions.BindsTwoWayByDefault);

    public static readonly DependencyProperty Property_A = DependencyProperty.Register("Property_A", typeof(string), typeof(MyControl), propertyMetaData);
    public static readonly DependencyProperty Property_B = DependencyProperty.Register("Property_B", typeof(string), typeof(MyControl), propertyMetaData);
    public static readonly DependencyProperty Property_C = DependencyProperty.Register("Property_C", typeof(string), typeof(MyControl), propertyMetaData);

我是否需要为每个属性声明单独的元数据，还是可以使用相同的元数据？

谢谢，埃蒙

原文

I have 3 dependancy Properties and a FrameworkPropertyMetadata, I get a crash when I try to use the metadata on more than one DP. I dont want to have 3 duplicates of the metadatam is there a way around this.

    static FrameworkPropertyMetadata propertyMetaData = new FrameworkPropertyMetadata("My Control", FrameworkPropertyMetadataOptions.BindsTwoWayByDefault);

    public static readonly DependencyProperty Property_A = DependencyProperty.Register("Property_A", typeof(string), typeof(MyControl), propertyMetaData);
    public static readonly DependencyProperty Property_B = DependencyProperty.Register("Property_B", typeof(string), typeof(MyControl), propertyMetaData);
    public static readonly DependencyProperty Property_C = DependencyProperty.Register("Property_C", typeof(string), typeof(MyControl), propertyMetaData);

Do I need to declare a seperate metadata for each property or can I use the same one?

Thanks,
Eamonn

分享到QQ

分享到微博

如果你对这篇内容有疑问，欢迎到本站社区发帖提问参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。

发布评论

需要登录才能够评论，你可以免费注册一个本站的账号。

我一向站在原地 2024-11-04 07:48:41

如果您想避免代码重复（这看起来很合理），您可以编写类似于以下的简单实用方法：

private internal static FrameworkPropertyMetadata CreateDefaultPropertyMetadata()
{
   return new FrameworkPropertyMetadata("My Control", FrameworkPropertyMetadataOptions.BindsTwoWayByDefault);
}

然后使用它：

public static readonly DependencyProperty Property_A = DependencyProperty.Register("Property_A", typeof(string), typeof(MyControl), CreateDefaultPropertyMetadata());
public static readonly DependencyProperty Property_B = DependencyProperty.Register("Property_B", typeof(string), typeof(MyControl), CreateDefaultPropertyMetadata());
public static readonly DependencyProperty Property_C = DependencyProperty.Register("Property_C", typeof(string), typeof(MyControl), CreateDefaultPropertyMetadata());

如果我正在解释显而易见的事情，请原谅。

If you want to avoid code repeating (which seem reasonable), you can write simple utility method similar to:

private internal static FrameworkPropertyMetadata CreateDefaultPropertyMetadata()
{
   return new FrameworkPropertyMetadata("My Control", FrameworkPropertyMetadataOptions.BindsTwoWayByDefault);
}

And then use it:

public static readonly DependencyProperty Property_A = DependencyProperty.Register("Property_A", typeof(string), typeof(MyControl), CreateDefaultPropertyMetadata());
public static readonly DependencyProperty Property_B = DependencyProperty.Register("Property_B", typeof(string), typeof(MyControl), CreateDefaultPropertyMetadata());
public static readonly DependencyProperty Property_C = DependencyProperty.Register("Property_C", typeof(string), typeof(MyControl), CreateDefaultPropertyMetadata());

Excuse me if I'm explaining obvious things.

回复收藏 0 原文