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unmananaged C++ and c# problems

unmananaged C++ and c# problems, Converting C++ struct to C#

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zakary	4 Mar, 2008 - 07:59 AM Post #1
D.I.C Regular Joined: 15 Feb, 2005 Posts: 420 Thanked: 8 times Dream Kudos: 175 My Contributions	I am not completely sure this is corrrect. cpp struct tagRAP_DIS_Info { char szInterface[16]; char szAddress[16]; DWORD dwMode; // CastMode short wPort; BYTE bExercise; BYTE bVersion; }; csharp [System.Runtime.InteropServices.StructLayout(System.Runtime.InteropServices.LayoutKind.Sequential)] struct tag_Info { string[] szInterface; string[] szAddress; uint dwMode; // CastMode Int16 wPort; Byte bExercise; Byte bVersion; }; unfortunately in my code I only get a pointer to the error that is defined by the cpp dll or a 0(zero) meaning it is ok. thanks for any help you can give me
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baavgai	RE: Unmananaged C++ And C# Problems 4 Mar, 2008 - 11:48 AM Post #2
Dreaming Coder Joined: 16 Oct, 2007 Posts: 2,290 Thanked: 136 times Dream Kudos: 475 Expert In: C, C++, Java, C#, ASP.NET, PHP, Perl, Python, Oracle, SQL Server, MySql, HTML, JavaScript, Lua, Cheese My Contributions	Those string[] are right out. Something like this might do it: csharp struct tag_Info { unsafe fixed char szInterface[16]; unsafe fixed char szAddress[16]; uint dwMode; // CastMode short wPort; byte bExercise; byte bVersion; };
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zakary	RE: Unmananaged C++ And C# Problems 4 Mar, 2008 - 11:52 AM Post #3
D.I.C Regular Joined: 15 Feb, 2005 Posts: 420 Thanked: 8 times Dream Kudos: 175 My Contributions	Thanks baavgai I will try it and see if it works
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zakary

RE: Unmananaged C++ And C# Problems
5 Mar, 2008 - 10:57 AM

Post #4

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Joined: 15 Feb, 2005
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Thanks again baavgai it did not work but you got me on the right direction.

This worked.

csharp



struct tag_Info 
{
            [System.Runtime.InteropServices.MarshalAs(System.Runtime.InteropServices.UnmanagedType.ByValTStr, SizeConst=16)]
            public string szInterface; //IP address; inet_ntoa()
            [System.Runtime.InteropServices.MarshalAs(System.Runtime.InteropServices.UnmanagedType.ByValTStr, SizeConst = 16)]
            public string szAddress; //Broadcast/Multicast address
            
            public UInt32 dwMode; //0 = Broadcast, 1 = Multicast
            public Int16 wPort; //Network port
            public Byte bExercise; //DIS Exercise ID; 1-255
            public Byte bVersion; //DIS Version; 5 or 6
};