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