c# - 如何在 C# 中获取对象的子对象？

Question

在 VB.net 中，这段代码是可以的:

Dim oPS as Object= CreateObject("Photoshop.Application.10")
Dim oDocument as Object= oPS.ActiveDocument

但是在C#中，这段代码出现错误:

Object oPS = COMCreateObject("Photoshop.Application.10");
Object oDocument = oPS.ActiveDocument;

构建时出错

Error   2   'object' does not contain a definition for 'ActiveDocument' and no extension method 'ActiveDocument' accepting a first argument of type 'object' could be found (are you missing a using directive or an assembly reference?)

如何在C#中获取对象的子对象(同vb.net)？

Answer 1

使用 dynamic 关键字代替 object :

dynamic oPS = COMCreateObject("Photoshop.Application.10");
dynamic oDocument = oPS.ActiveDocument;

MSDN 引用:https://msdn.microsoft.com/en-us/library/dd264736.aspx