c# - PropertyGrid 显示也是类的类成员

Question

我有 类 PGMain 作为 propertygrid 中的 SelectedObject:

         [DefaultPropertyAttribute("Basic")]
[Serializable]
public class PGMain
{    
    private TestClass m_TEST = new TestClass();
    [CategoryAttribute("TEST")]
    public TestClass TEST
    {
        get { return m_TEST; }
        set { m_TEST = value; }
}
    // More members are here
}

现在我想在 PropertyGrid 中扩展 TestClass 的成员。所以我尝试了以下方法:

   [Serializable]
[DescriptionAttribute("Expand to see the options for the application.")]
[TypeConverter(typeof(ExpandableObjectConverter))]
public class TestClass : ExpandableObjectConverter
{
    [CategoryAttribute("test-cat"), DescriptionAttribute("desc")]        
    public string Name = "";
    [CategoryAttribute("test-cat"), DescriptionAttribute("desc")]
    public object Value = null;
    [CategoryAttribute("test-cat"), DescriptionAttribute("desc")]
    public bool Include = true;

    public override bool CanConvertTo(ITypeDescriptorContext context, System.Type destinationType)
    {
        if (destinationType == typeof(TestClass))
            return true;

        return base.CanConvertTo(context, destinationType);
    }
}

结果是propertygrid中的TestClass前面有一个expandable-icon但是不能展开。我错过了什么？明确一点:我可以显示 PGMain 类的可扩展成员，但不能显示 PGMain 类成员的可扩展成员，例如 PGMain 中的测试成员。

---

编辑:

不，我有 2 个类而不是 1 个。

  [DefaultPropertyAttribute("Basic")]
[TypeConverter(typeof(ExpandableObjectConverter))]
public class fooA
{
    private fooB m_TestMember = new fooB();
    [Browsable(true)]
    [CategoryAttribute("Test category"), DescriptionAttribute("desctiption here")] // <<<<< this one works.
    [TypeConverter(typeof(fooB))]
    public fooB TestMember
    {
        get { return m_TestMember; }
        set { m_TestMember = value; }
    }

}

[DefaultPropertyAttribute("Basic")]
[TypeConverter(typeof(ExpandableObjectConverter))]
public class fooB
{
    private string m_ShowThisMemberInGrid = "it works"; // <<<<< this doesn NOT work
    [CategoryAttribute("Tile"), DescriptionAttribute("desctiption here")]
    public string ShowThisMemberInGrid
    {
        get { return m_ShowThisMemberInGrid; }
        set { m_ShowThisMemberInGrid = value; }
    }

    public override string ToString()
    {
        return "foo B";
    }
}

但我确实解决了这个问题(巧合)。公共(public)变量似乎没有列在 propertygrid 中。它必须是具有 getter 和 setter 的属性。这就是解决方案。所以上面的代码片段解决了这个问题。无论如何感谢您的回复:)。

Answer 1

错误:

[CategoryAttribute("Tile"), DescriptionAttribute("desctiption here")]
public string Name = "";

好:

    private string m_Name = new string();
    [CategoryAttribute("Tile"), DescriptionAttribute("desctiption here")]
    public string Name
    {
        get { return m_Name; }
        set { m_Name = value; }
    }