A question about mapviewoffile in C#

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I writted code in c++ environmental as below:
CreateFileMapping(INVALID_HANDLE_VALUE, NULL, PAGE_READWRITE, 0, sizeof(MCDTYPE1), NULL);
MCDTYPE1* pDest = (MCDTYPE1*)MapViewOfFile(hFileMapDest, FILE_MAP_WRITE, 0, 0, 0);

MCDTYPE1 is struct type
set some values to MCDTYPE1 struct member.
pDest = &MCDTYPE1;

but how to get struct value in c#.

What I have tried:

C#

MCDTYPE1 result = (MCDTYPE1 )Marshal.PtrToStructure(mapView, typeof(UIStruct));

it failed to get values of MCDTYPE1.

Posted 18-Nov-16 21:26pm

xuyunhai20160827

Updated 19-Nov-16 1:52am

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Midi_Mick · Answer 1 · 2016-11-19T01:52:00

I am needing to make a couple of assumptions here:
1. MCDTYPE1 has been declared in C#, decorated with a StructLayoutAttribute(LayoutKind.Sequential).
2. You've somehow retrieved the pointer to pDest in MapView

I've found (if you're using .NET4.6), the simplest solution is to use the Generic form if PtrToStructure

C#

MCDTYPE1 result = Marshal.PtrToStructure<mcdtype1>(mapView)</mcdtype1>

Otherwise, what is your UIStruct? Should not that be typeof(MCDTYPE1)?