How to Convert a C# Structure (CIFSPacket) to a Byte Array for Network Transmission?

The conversion of the structure to the byte array in the structure of the byte array

Network data transmission needs to convert the structure to byte array. The following answers describing how to convert a specific structure named Cifspacket in C# to byte array:

Question:

How to convert the CIFSPACKET structure into byte array in order to transmit network transmission by using a piece of word?

Answer:

Marshaling is an effective way to convert this. Implement:

Including header files: Add

to the beginning of the program.

1. Getbytes function: Define a function to convert the CIFSPACKET structure into byte array: using System.Runtime.InteropServices;

2. Frombytes function: Define a function to convert the byte array back to the CIFSPACKET structure:

   <code class="language-csharp"> byte[] getBytes(CIFSPacket str) {
        int size = Marshal.SizeOf(str);
        byte[] arr = new byte[size];
   
        IntPtr ptr = IntPtr.Zero;
        try {
            ptr = Marshal.AllocHGlobal(size);
            Marshal.StructureToPtr(str, ptr, true);
            Marshal.Copy(ptr, arr, 0, size);
        } finally {
            Marshal.FreeHGlobal(ptr);
        }
        return arr;
    }</code>

3. Other precautions:
   For the string field, specify

   <code class="language-csharp"> CIFSPacket fromBytes(byte[] arr) {
        CIFSPacket str = new CIFSPacket();
   
        int size = Marshal.SizeOf(str);
        IntPtr ptr = IntPtr.Zero;
        try {
            ptr = Marshal.AllocHGlobal(size);
   
            Marshal.Copy(arr, 0, ptr, size);
   
            str = (CIFSPacket)Marshal.PtrToStructure(ptr, str.GetType());
        } finally {
            Marshal.FreeHGlobal(ptr);
        }
        return str;
    }</code>

   to indicate a string with a maximum size of 100.

Example usage:

Send function:

• [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 100)]
Receiving function:

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