我編寫了一個 c++ 程序，它通過 memorystream 將數組 multi 發送到 c# 應用程序。但我不知道如何使用 BlockCopy 來排列多：這是我的程序 C++ 發送數組多struct Pair { std::pair<int, int> players;};struct Pair* p;HANDLE handle;float dataSend[70];bool startShare(){ try { handle = CreateFileMappingW(INVALID_HANDLE_VALUE, NULL, PAGE_READWRITE, 0, sizeof(Pair), L"DataSend"); p = (struct Pair*) MapViewOfFile(handle, FILE_MAP_READ | FILE_MAP_WRITE, 0, 0, sizeof(Pair)); return true; } catch (...) { return false; }}for (int i = 0; i < 70; i++){ int r1 = rand() % 10 + 1; int r2 = rand() % 10 + 1; p->players = { r1,r2 };}示例輸出： players 0 - [10][2] players 1 - [100][22] players 2 - [1][26] players 3 - [50][211] players 4 - [32][23]我的 C# 程序讀?。簆ublic static int[,] data = new int[70, 1];public static MemoryMappedFile mmf;public static MemoryMappedViewStream mmfvs;static public bool MemOpen(){ try { mmf = MemoryMappedFile.OpenExisting("DataSend"); mmfvs = mmf.CreateViewStream(); return true; } catch { return false; }}// here need be somethings like byte[,] bPosition = new byte[70,1];byte[] bPosition = new byte[70];mmfvs.Read(bPosition, 0, 100);Buffer.BlockCopy(bPosition, 0, data, 0, bPosition.Length); for (int i = 0; i< data.Length; i++) { for(int j=0;j<1;j++) { Console.WriteLine(data[i][j]); }}示例接收： data 0 - [10][2] data 1 - [100][22] data 2 - [1][26] data 3 - [50][211] data 4 - [32][23]我編寫了一個 c++ 程序，它通過 memorystream 將數組 multi 發送到 c# 應用程序。但我不知道如何使用 BlockCopy 來排列多：這是我的程序 C++ 發送數組多
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TA貢獻1804條經驗 獲得超3個贊
嘗試以下：
MemoryStream stream = new MemoryStream();
byte[] buffer = new byte[70 * 2 * sizeof(int)];
stream.Read(buffer, 0, 70 * 2 * sizeof(int));
for (int i = 0; i< 70; i++)
{
for (int j = 0; j < 2; j++)
{
Console.WriteLine(BitConverter.ToUInt32(buffer,(i * 2 * sizeof(int)) + (j * sizeof(int))));
}
}
IntPtr bufferPtr = Marshal.AllocHGlobal(BUFFER_SIZE);
//you need to allocate memory before calling the routing
byte[] buffer = new byte[BUFFER_SIZE];
Marshal.Copy(bufferPtr, buffer, 0, BUFFER_SIZE);
for (int i = 0; i < 70; i++)
{
for (int j = 0; j < 2; j++)
{
Console.WriteLine(BitConverter.ToUInt32(buffer, (i * 2 * sizeof(int)) + (j * sizeof(int))));
}
}
//method 2
int[,] array = new int[40, 2];
IntPtr bufferPtr2 = Marshal.AllocHGlobal(Marshal.SizeOf(array));
//call routine then you code below to fill managed memory.
Marshal.PtrToStructure(bufferPtr2, array);
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