问题
Is it possible to use Marshal.SizeOf() on a structure which is using a custom marshaler?
For example:
struct Abcde {
public int test1;
[MarshalAs(UnmanagedType.CustomMarshaler, MarshalTypeRef = typeof(MyCustomMarshaler)]
public string customString1;
}
If I call:
var size = Marshal.SizeOf(typeof(Abcde));
an exception is thrown which says that no meaningful size or offset can be computed. I noticed that ICustomMarshaler has a method called GetNativeDataSize() but the exception is thrown regardless what I return there.
回答1:
Marshal.SizeOf
cannot be used with types that contain custom marshaled members.
来源:https://stackoverflow.com/questions/23239320/c-sharp-marshal-sizeof-when-using-custom-marshaler