DisplayFusion RSS: Converting C++ Data Types to C#

RE: Converting C++ Data Types to C#

Binary Fortress Software — Mon, 16 Nov 2015 18:51:30 GMT

@Suresh: You just need to change "public MyChar Status" to "public chat Status" and it should work in C#. You might need to use the "byte" type instead of "char", but you'll have to test that.

RE: Converting C++ Data Types to C#

Binary Fortress Software — Fri, 13 Nov 2015 01:05:48 GMT

Hi,
I have c++ code as below
typedef char MyChar;
public struct OutParameter
{
public MyChar Status;
}

The above c++ struct is returned by reference in function parameter.

Could you please provide me equivalent C# struct .

RE: Converting C++ Data Types to C#

Binary Fortress Software — Mon, 13 Jul 2015 13:23:48 GMT

I'm not sure which timestamp type you're working with exactly, but this post has info on converting from a ULONGLONG to a FILETIME struct:
http://stackoverflow.com/questions/4570194/log-with-timestamps-that-have-millisecond-accuracy-resolution-in-windows-c

RE: Converting C++ Data Types to C#

Binary Fortress Software — Mon, 13 Jul 2015 04:47:22 GMT

How do we get those nasty Timestamps from ULONGLONG?

RE: Converting C++ Data Types to C#

Binary Fortress Software — Fri, 29 May 2015 13:49:51 GMT

@Jody: Thanks, I must have missed that one. It's on the list now.

RE: Converting C++ Data Types to C#

Binary Fortress Software — Thu, 28 May 2015 22:50:50 GMT

You're missing WORD. You have DWORD but no WORD. WORD is same as your listing for UINT16 so in C# it would be Uint16 or ushort.

RE: Converting C++ Data Types to C#

Binary Fortress Software — Wed, 18 Dec 2013 21:32:16 GMT

"unsigned char" is a byte in C#. A C# byte is an unsigned 8bit type, just the unsigned char.

RE: Converting C++ Data Types to C#

Binary Fortress Software — Wed, 18 Dec 2013 19:25:25 GMT

unsigned char c++ convert to c#?

RE: Converting C++ Data Types to C#

Binary Fortress Software — Mon, 10 Dec 2012 02:46:47 GMT

Strings can be very tricky! I would recommend just using IntPtr for the parameter while trying to figure it out. Once you get the IntPtr value use Marshal.PtrToStr functions to read the string value. I find this is more reliable than relying on the p/invoke marshalling in some situations. I hope this helps!

RE: Converting C++ Data Types to C#

Binary Fortress Software — Sun, 09 Dec 2012 08:30:49 GMT

What about strings? I'm trying to convert System.String of C# to char* or unsigned char* in C++. But it was indicated that char* is SByte. I've tried char variable[], std::string, unsigned char*, and none of them worked. I tried converting the System.String to SByte using Convert static method, but then another error shows up, saying SByte can't be converted to SByte*.

Hope to get a response.

RE: Converting C++ Data Types to C#

Binary Fortress Software — Tue, 07 Aug 2012 03:23:58 GMT

@cesc: Sorry, I'm not familiar with those types, and I've never had to convert them.

RE: Converting C++ Data Types to C#

Binary Fortress Software — Mon, 06 Aug 2012 09:43:18 GMT

CTime, CTimeSpan convert C#?

RE: Converting C++ Data Types to C#

Binary Fortress Software — Tue, 31 Aug 2010 17:33:23 GMT

@Carlo: It looks like ctime is just an int64:
http://bytes.com/topic/c-sharp/answers/259755-convert-c-ctime-c-datetime

RE: Converting C++ Data Types to C#

Binary Fortress Software — Tue, 31 Aug 2010 05:28:34 GMT

hi , c++ type ctime how can be converted in c# ?

RE: Converting C++ Data Types to C#

Binary Fortress Software — Mon, 28 Jun 2010 22:58:57 GMT

Good list! (Yeah, there are other types but who uses those...)

Maybe add these though...? C++ has had a native boolean type "bool" for a while now, as well as a floating point types "float" and "double". (Never have understood why they typedef'ed those; I guess they wanted ALL their types to be uppercase...)

@Billy: This _is_ C# interop (i.e. Windows!) we're talking about, so naturally you're dealing with Win32 data types, that are typedef'ed in C++ and native in C#. Thanks though for pointing out the obvious! =P

RE: Converting C++ Data Types to C#

Binary Fortress Software — Mon, 03 May 2010 00:49:48 GMT

Just an FYI: Those are *not* C or C++ datatypes, they are Win32 API datatypes. Standard C++ does not define any of what you have above excepting `void *`.

Have a nice day

Converting C++ Data Types to C#

Binary Fortress Software — Mon, 12 Apr 2010 10:00:00 GMT

If you've ever had to write any interop code to use an unmanaged library in your C# application, you know how tricky it can be to get the data types correct. I often find myself scouring the internet looking for the correct conversions, so I thought I would document everything I have learned so far. This is by no means a comprehensive list of all C++ data types, just the ones I find myself frequently writing interop code for.

C++ Type	C# Type	Size
BOOL	bool	1 byte
BYTE	byte	1 byte
CHAR	byte	1 byte
DECIMAL	Decimal	16 bytes
DOUBLE	double	8 bytes
DWORD	uint, UInt32	4 bytes
FLOAT	float, single	4 bytes
INT, signed int	int, Int32	4 bytes
INT16, signed short int	short, Int16	2 bytes
INT32, signed int	int, Int32	4 bytes
INT64	long, Int64	8 bytes
LONG	int, Int32	4 bytes
LONG32, signed int	int, Int32	4 bytes
LONG64	long, Int64	8 bytes
LONGLONG	long, Int64	8 bytes
SHORT, signed short int	short, Int16	2 bytes
UCHAR, unsigned char	byte	1 byte
UINT, unsigned int	uint, UInt32	4 bytes
UINT16, WORD	ushort, UInt16	2 bytes
UINT32, unsigned int	uint, UInt32	4 bytes
UINT64	ulong, UInt64	8 bytes
ULONG, unsigned long	uint, UInt32	4 bytes
ULONG32	uint, UInt32	4 bytes
ULONG64	ulong, UInt64	8 bytes
ULONGLONG	ulong, UInt64	8 bytes
WORD	ushort	2 bytes
void*, pointers	IntPtr	x86=4 bytes, x64=8 bytes

If I am missing something, or you would like me to include something else, please let me know in the comments below. Thanks!