C# 使用反射获取类型
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Get type using reflection
提问by Martin Ch
I am trying get type of property of my class by using of reflection but its returning my only RuntimePropertyInfo - as a name of a type.
我正在尝试通过使用反射来获取我的类的属性类型，但它返回我唯一的 RuntimePropertyInfo - 作为类型的名称。
I have object MyObject actualData - it contains property - "name" as string and "Item" as my type DatumType
我有对象 MyObject actualData - 它包含属性 - “name”作为字符串和“Item”作为我的类型 DatumType
When I am debugging I can see, that actualData has 2 properties, first one is type of string and second one is DatumType, but when I use this:
当我调试时，我可以看到，actualData 有 2 个属性，第一个是字符串类型，第二个是 DatumType，但是当我使用它时：
string typeName = actualData.getType().getProperty("Item").getType().Name- it returns me RuntimePropertyInfo, not DatumType
string typeName = actualData.getType().getProperty("Item").getType().Name- 它返回我 RuntimePropertyInfo，而不是 DatumType
Can you see what am I doing wrong? I am using C# - .Net 4.0. Thanks a lot!
你能看出我做错了什么吗？我正在使用 C# - .Net 4.0。非常感谢！
采纳答案by C.Evenhuis
You're getting the type of the PropertyInfoobject getProperty()returns. Try
您正在获取PropertyInfo对象getProperty()返回的类型。尝试
string typeName = actualData.getType().getProperty("Item").PropertyType.Name;
If you want the type of the value currently assigned to the object via the PropertyInfoobject, you could call:
如果您想要通过PropertyInfo对象当前分配给对象的值的类型，您可以调用：
string typeName = actualData.getType().getProperty("Item").GetValue(actualData, null).GetType().Name;
But in that case you could also simply call:
但在这种情况下，您也可以简单地调用：
string typeName = actualData.Item.GetType().Name;
回答by Wiktor Zychla
The
这
actualData.getType().getProperty("Item")
retrieves something of type PropertyInfo.
检索类型的东西PropertyInfo。
If you then ask for its type:
如果你然后询问它的类型：
actualData.getType().getProperty("Item").getType()
you get exactly what you observe you get.
你得到的正是你所观察到的。
I suspect this last getType()is not necessary then.
我怀疑这最后getType()是没有必要的。
Edit: someone has downvoted this answer which is unfair imho. The question is "Can you see what am I doing wrong?" and the answer of being one getTypetoo far is a correct one. Finding PropertyTypein PropertyInfois then easy if the asking person knows what he is doing wrong.
编辑：有人低估了这个答案，恕我直言不公平。问题是“你能看出我做错了什么吗？” getType太远的答案是正确的。发现PropertyType在PropertyInfo是那么容易，如果在询问的人都知道他在做什么错。
To the person who downvoted this answer: please at least leave a comment next time you downvote something. Stackoverflow makes sense only if we learn from each other, not just bash everyone around.
对于否决此答案的人：请至少在下次您否决某些内容时发表评论。Stackoverflow 只有在我们相互学习的情况下才有意义，而不仅仅是抨击周围的每个人。
回答by Arnaud F.
GetType()return always the type of the current object, not the pointed object.
GetType()始终返回当前对象的类型，而不是指向的对象。
In your case, consider using string typeName = actualData.getType().getProperty("Item").PropertyType.Name
在您的情况下，请考虑使用 string typeName = actualData.getType().getProperty("Item").PropertyType.Name
