添加编辑/ EditorAttribute在运行时（动态）为对象的属性

问题描述

如何在运行时EditorAttribute（编辑）添加到对象的属性？

我 My.Settings.ExcludeFiles ，这是由设计师设置创建为公共财产ExcludedFiles（）由于Global.System.Collections。 Specialized.StringCollection 。当编辑 ExcludedFiles 通过属性网格，字符串集合编辑器，关于类型构造'System.String'找不到生成运行时异常。

I have My.Settings.ExcludeFiles, which is created by the settings designer as Public Property ExcludedFiles() As Global.System.Collections.Specialized.StringCollection. When editing ExcludedFiles via a property grid, the "String Collection Editor" generates a "Constructor on type 'System.String' not found" run-time exception.

我不能更改 ExcludeFiles 属性的特性，因为他们将在未来任何时间设置更改时被覆盖。因此，我必须附上/添加编辑/ EditorAttribute在运行时。

I cannot change the attributes of the ExcludeFiles property because they will be overwritten the next time any setting changes are made. Therefore, I must attach/add the Editor/EditorAttribute at run-time.

我想要做的就是添加 StringCollectionEditor 在运行时，如下图所示的设计时属性。

What I want to do is add the StringCollectionEditor at run-time, shown below as design-time attribute.

    <Editor(GetType(StringCollectionEditor), GetType(UITypeEditor))> _

---

解决方案

方法1

TypeDescriptor.AddAttributes( _
    GetType(Specialized.StringCollection), _
    New EditorAttribute( _
        "System.Windows.Forms.Design.StringCollectionEditor, System.Design, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a", _
         GetType(System.Drawing.Design.UITypeEditor)))

您只需一次添加此属性，如应用程序初始化。

You only have to add this attribute once, such as application initialization.

更灵活。见萨科Cadilhac
下面回答在http://stackoverflow.com/questions/2043579/adding-editor-editorattribute-at-run-time-dynamically-to-an-objects-property/2044673#2044673.它采用衍生CustomTypeDescriptor和TypeDescriptionProvider类。你只需要添加一次提供商，如应用程序的初始化。

More flexible. See Nicolas Cadilhacanswer below at http://stackoverflow.com/questions/2043579/adding-editor-editorattribute-at-run-time-dynamically-to-an-objects-property/2044673#2044673. It uses derived CustomTypeDescriptor and TypeDescriptionProvider classes. You only have to add the provider once, such as application initialization.

推荐答案

给你我的第一个答案之后，我想起马克·Gravell给出另一种解决方案，我连评论。信不信由你，你只需要调用TypeDescriptor.AddAttributes（）。

After giving you my first answer, I remembered another solution given by Marc Gravell that I even commented. Believe it or not, you just need to call TypeDescriptor.AddAttributes().

这是在这里：How我做了注入闭源类型的所有属性的自定义UITypeEditor的？。

有关你的情况给出了：

TypeDescriptor.AddAttributes(
    typeof(StringCollection),
    new EditorAttribute("System.Windows.Forms.Design.StringCollectionEditor,
        System.Design, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a",
        typeof(UITypeEditor)))

因此​​，也许你应该取消我的previous答案，并确认这个作为解决方案（尽管所有归功于马克）。但是，当你需要用一个TypeDescriptor做多复杂的东西我的previous后仍然给你一个很好的技术。

So maybe you should uncheck my previous answer and confirm this one as the solution (although all the credit goes to Marc). But my previous post still gives you a good technique when you need to do more complex stuff with a TypeDescriptor.

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