开发视频监控系统纪实 6 DllImport问题

搞了3天 就在调试海康的DLL，一个buffer的问题。终于搞定了

Reference:

http://www.csharphelp.com/archives/archive52.html

API：

int __stdcall GetOriginalImage(HANDLE hChannelHandle, UCHAR *ImageBuf, ULONG *Size)

C#

[DllImport("DS40xxSDK.dll")]

public static extern int GetOriginalImage(IntPtr hChannelHandle, [MarshalAs(UnmanagedType.LPArray)] byte[] ImageBuf, ref long Size);

调用：

byte[] byffer = new byte[1048576];

long size = 1048576;

DS40xxSDK.GetOriginalImage(handler1, byffer, ref size);

关键就是要初始化这个buffer