如何获取已声明的TList中元素的类型 [英] How to get the type of the elements in a declared TList

问题描述

我想知道是否有一种方法来获取已声明但未实例化的TList的元素类型。我可以像这样捕获对象属性的类：

I'd like to know if there is a way to get the type of the elements of a declared, but not instantiated, TList. I can capture the class of an object property like this:

MyList: TList<TMyObject> read FMyList;

MyRTTIProperty: TRttiProperty;    
NewObject: TObject;
PropertyClass: TClass;

MyRttiProperty := MyRttiType.GetProperty('MyList');
PropertyClass := MyRTTIProperty.PropertyType.Handle.TypeData.ClassType; // (returns TList<TMyObject>)
NewObject := PropertyClass.Create;

这样我可以正确实例化列表。但是现在我也想获取元素的类TMyObject，以便我可以实例化它们，填充其属性并添加到列表中。我该怎么办？

This way I can instantiate my list correctly. But now I also want to get the class of the elements, TMyObject, so that I can instantiate them, fill its properties and add to the list. How can I do that?

预先感谢。

推荐答案

据我所知，RTTI不够灵活，无法为您提供有关通用参数的信息。您可能必须手动解析 MyRTTIProperty.PropertyType.Name （ TList< TMyObject> ）的值以提取通用类型名称（ TMyObject ），然后使用 TRttiContext.FindType（）获取该类型的RTTI，然后最后，您可以根据需要创建其 ClassType 的实例。

As far as I know, RTTI is not flexible enough to give you information about Generic parameters. You will likely have to manually parse the value of MyRTTIProperty.PropertyType.Name (TList<TMyObject>) to extract the Generic type name (TMyObject), then use TRttiContext.FindType() to get the RTTI for that type, and then finally you can create instances of its ClassType as needed.

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