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POHow to rebuild a struct from bytes after transfer [C#]
 

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  1. POHow to rebuild a struct from bytes after transfer [C#]
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    <p>I am using Named Pipes to transfer data from a client (C++) to a server (C#), the client does the following:</p> <pre><code>// C++ Client sending message struct MESSAGE { char cCommand[8]; string sParameter; }; MESSAGE msg; strcpy(msg.cCommand, "COMMAND"); strcpy(msg.sParameter, "DO SOMETHING"); DWORD dwWrote = 0; WriteFile (hpipe, &amp;msg, sizeof(msg), dwWrote, NULL); // Then, at the receiving end the C# server recieve message: IntPtr chRequest; bool fSuccess = ReadFile(hPipeInst, chRequest, uSize, cbRead, OverlappedPtr); if (fSuccess) byte[] temp = Encoding.ASCII.GetBytes(Marshal.PtrToStringAnsi(chRequest)); </code></pre> <p>Now, at the receiving end, I need to transform the temp (byte[]) back into the STRUCT or something equivalent so I can access the members cCommand and sPatameter - but at this point I have no clue how to proceed... In reality doesn't need to be a struct, I just need to extract the data itself.</p> <p>Note - the STRUCT MESSAGE is something I came up with, meaning that it can be changed if a different format would be helpful in the reconstruction (add the length of sParameter for example?), I just need a COMMAND and PARAMETER to be transfered in a single block (if possible).</p> <p>Requirements are simple: - COMMAND is a fixed-length 8-characters long string that indicates what action needs to be performed - PARAMETER is a variable-length (unless this causes issues) parameter dependant on each COMMAND</p> <p>For example: COMMAND = TRANS</p> <p>PARAMETER = C:\FILE.txt C:\NewFolder\FILE.TXT</p> <p>(this is just to illustrate, there are a lot more applications)</p> <p>If possible I would like to extract it as a chunk of data (byte[]) and then pass it along to my application where it could be decomposed, not a fan of reading in the size, then a field, then a size, then a field - that requires that my Communication be overly linked with my implementation.</p> <p>If there is a more suitable way to implement this transfer please let me know... advice would be welcome... Any help would be much appreciated. Thanks,</p>
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