delphi - 枚举常量属性不流式传输

Question

给定以下类型声明:

  TMyEnum = (onehundred,twohundred,threehundred);
  TMyEnum2 = (Aonehundred = 100 , Atwohundred = 200 , Athreehundred = 300);

  TMyComponent = class(TComponent)
  private
    FMyEnum: TMyEnum;
    FMyEnum2: TMyEnum2;
  published
    property MyEnum: TMyEnum read FMyEnum write FMyEnum;
    property MyEnum2: TMyEnum2 read FMyEnum2 write FMyEnum2;
  end;

使用 TStream.WriteComponent 不会流式传输 MyEnum2。有谁知道这是为什么，如果可以解决？

Answer 1

很遗憾，这是流媒体系统的限制。 documentation说(强调我的):

Some properties, although publishable, are not fully supported by the streaming system. These include properties of record types, array properties of all publishable types, and properties of enumerated types that include anonymous values. If you publish a property of this kind, the Object Inspector will not display it correctly, nor will the property's value be preserved when objects are streamed to disk.

您无法轻松解决此问题，您需要提供自己的 custom streaming .