怎么使用C# 调用 C++ DLL中的函数接口和回调函数？
怎么使用C# 调用 C++ DLL中的函数接口和回调函数？
数据分析师2017-10-01 00:01:56
How to use C# to call the function interface and callback function in C++ DLL? -PHP Chinese website Q&A-How to use C# to call the function interface and callback function in C++ DLL? -PHP Chinese website Q&A
Let’s take a look and learn.
伊谢尔伦2017-02-10 09:37:55
1、C#中大部分基本数据类型都和C++的基本数据类型相同，因此基本数据类型的转换比较简单，需要注意的就是字节大小。
2、C++数组和C#的数组转换需要注意的就是需要注意，需要增加声明如[MarshalAs(UnmanagedType.ByValArray, SizeConst = 10)]才能定义一个C++中的数组元素为10个的数组。
3、 C++的回调函数接口需要采用C#中的委托函数方法，C++的中回调函数设置中，一般使用的是地址值，因此需要C#中显示采用托管函数。 4、C++的指针数组，可用C#中的IntPtr ;如果只是地址指针，则C#中引用类型即可。
public enum VT_MESSAGE
{
VT_MESSAGE_SET_DEVICE_INFO,
VT_MESSAGE_UPDATE_DEVICE_INFO,
VT_MESSAGE_UPDATE_MIXER_IN_CTRL,
VT_MESSAGE_UPDATE_MIXER_OUT_CTRL,
VT_MESSAGE_MISSED_CALLS, // 未接来电};public enum VT_TASK_TYPE //终端状态{
VT_TASK_TYPE_NULL, //空闲(无任务)
VT_TASK_TYPE_TO_MONITOR, //发起监听
VT_TASK_TYPE_BY_MONITOR, //被监听
VT_TASK_TYPE_TO_BROADCAST, //发起采播
VT_TASK_TYPE_BY_BROADCAST, //接收采播
VT_TASK_TYPE_TO_TALK, //发起对讲
VT_TASK_TYPE_BY_TALK, //接收对讲
VT_TASK_TYPE_MULTITALK, //多方通话
VT_TASK_TYPE_OFFLINETALK, //离线对讲};public enum VT_TASK_STATE //终端任务状态 {
VT_TASK_STATE_NULL, // 无任务
VT_TASK_STATE_STOP, // 监听停止,对讲停止,广播停止
VT_TASK_STATE_CONNECTING, // 监听:连接中
VT_TASK_STATE_CALLING, // 对讲:呼叫中
VT_TASK_STATE_BEGIN_BC_PROMPT, // 广播:开始提示音
VT_TASK_STATE_END_BC_PROMPT, // 广播:结束提示音
VT_TASK_STATE_ONGOING, // 监听中,对讲中,广播中};public enum VT_TARGET_STATE // 目标状态{
VT_TARGET_STATE_NULL = 0, // 未知
VT_TARGET_STATE_OFFLINE, // 目标脱机
VT_TARGET_STATE_STOP, // 目标停止
VT_TARGET_STATE_REJECT, // 目标拒绝
VT_TARGET_STATE_BUSY, // 目标呼叫忙
};
[StructLayout(LayoutKind.Sequential)]public struct VT_TASK_TARGET
{ public int nCount; // 监听,对讲,广播选择的目标数量
public int nEditPos; // 当前正在编辑的位置
public VT_TASK_TYPE xeTaskType; // 任务类型
public VT_TASK_STATE xeTaskState; // 任务组的任务状态
public VT_TARGET_STATE xeTargetState; // 对讲目标状态
public bool bIsBegin; // 任务是否已开始(呼叫...)
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 6)] public VT_TASK_STATE[] pxeTerState; // 各终端的任务状态 VT_DEVICE_MAX_COUNT 6
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 128)] public ushort[] pwID; // 终端ID(0:1号终端...)或分区号(1:分区1...) VT_BROADCAST_MAX_COUNT 128
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 128)] public int[] piSerIdx; // 各终端对应的服务器编号
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 6)] public byte[] pucPanelNo; // NAS-8521,呼叫到面板,终端对应的面板序号
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 256)] public char[] strFileName; // 文件广播时,当前广播的文件名
public uint offlineTargetIP; //离线目标IP
public ushort offlineTargetPort; //离线目标端口
};
[StructLayout(LayoutKind.Sequential)]public struct tagSERVER
{ public uint ipServer; // 服务器IP (字节反序)
public ushort wServerPort; // 服务器接收端口 (字节反序)
public bool bFixPort; // 是否固定接收端口
public ushort wHostPort; // 本机接收端口 (字节反序)
public bool bOnline; // 是否联机
public bool bIsPCM; // 是否是PCM/ADPCM压缩
public bool bIs8K; // 是否是8K/22K采样
public bool bIsMultiCast; // 是否是组播/单播
public bool bRecord; // 是否录音
public uint ipRecord; // 录音IP
public ushort wRecordPort; // 录音端口
};
[StructLayout(LayoutKind.Sequential)]public struct VT_DEVICE_INFO
{ public ushort wDeviceId; // 设备编号(从0开始,显示时要加1)
public uint ipHost; // 主机IP (字节反序)
public bool bIsRegister; // 是否注册
public ushort dwVol; // 当前输出音量
public int iServerCount; // 服务器的数量
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 10)] public tagSERVER[] pxsServer; // 服务器
public int nTaskCount; // 任务数量
public int nCurTask; // 当前任务(对应于xsTaskTarget的下标)
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 1)] public VT_TASK_TARGET[] pxsTaskArray; // 任务目标};/// <summary>/// 跨平台调用方法/// </summary>public class NativeMethod{ /// <summary>
/// 路径最大大小
/// </summary>
public const int MAX_PATH = 260;
[DllImport("IPNBSVTD.dll")] public static extern void IPNBSVTD_DeleteDevice();
[DllImport("IPNBSVTD.dll")] public static extern byte IPNBSVTD_CreateDevice(byte ucCount);
[DllImport("IPNBSVTD.dll")] public static extern bool IPNBSVTD_DeviceMute(ref bool pbMute, boolbIsAudioOut, bool bIsSet);
[DllImport("IPNBSVTD.dll")] public static extern bool IPNBSVTD_DeviceVolume(ref int pdwVolume,bool bIsAudioOut, bool bIsSet);
[DllImport("IPNBSVTD.dll")] public static extern void IPNBSVTD_SetINIFilePath(byte ucDeviceIndex, string pINIFilePath);
[DllImport("IPNBSVTD.dll")] public static extern bool IPNBSVTD_OpenServer(byte ucDeviceIndex, IntPtr hParentWnd, uint nMsg); //[DllImport("IPNBSVTD.dll")]
//public static extern bool IPNBSVTD_SetBCFromFile(byte ucDeviceIndex, bool bBCFromFile, bool bLoop,
// [MarshalAs(UnmanagedType.LPArray)]string[] pStrFile, short sFileCount);
[DllImport("IPNBSVTD.dll")] public static extern bool IPNBSVTD_SetBCFromFileEx(byte ucDeviceIndex, bool bBCFromFile, bool bLoop, string strFile, bool bAdd);
public static void SetBCFromFile(byteucDeviceIndex, bool bBCFromFile, bool bLoop, List<string> files, short sFileCount)
{ for (int i = 0; i < files.Count; i++)
IPNBSVTD_SetBCFromFileEx(ucDeviceIndex, bBCFromFile, bLoop, files[i], (i == 0) ? false : true);
}
[DllImport("IPNBSVTD.dll")] public static extern bool IPNBSVTD_SetBCToTerm(byte ucDeviceIndex);
[DllImport("IPNBSVTD.dll")] public static extern bool IPNBSVTD_GetCurTaskTarget(byte ucDeviceIndex, ref VT_TASK_TARGET pTaskTarget, int iTaskPos);
[DllImport("IPNBSVTD.dll")] public static extern bool IPNBSVTD_SetCurTaskTarget(byte ucDeviceIndex, ref VT_TASK_TARGET pTaskTarget, int iTaskPos);
[DllImport("IPNBSVTD.dll")] public static extern bool IPNBSVTD_TaskBegin(byte ucDeviceIndex, int iTaskPos);
[DllImport("IPNBSVTD.dll")] public static extern bool IPNBSVTD_TaskEnd(byte ucDeviceIndex, intiTaskPos);
[DllImport("IPNBSVTD.dll")] public static extern bool IPNBSVTD_GetDeviceInfo(byte ucDeviceIndex, ref VT_DEVICE_INFO pDeviceInfo);
[DllImport("IPNBSVTD.dll")] public static extern bool IPNBSVTD_GetBCFileCurrent(byte ucDeviceIndex, StringBuilder strFile);
[DllImport("IPNBSVTD.dll")] public static extern bool IPNBSVTD_SetStatusCallBack(byte ucDeviceIndex, StatusCallBack dwCallBack, IntPtr dwInstance);
[DllImport("IPNBSVTD.dll")] public static extern bool IPNBSVTD_SetVoiceCallBack(byte ucDeviceIndex, VoiceCallBack dwCallBack, IntPtr dwInstance);
[DllImport("IPNBSVTD.dll")] public static extern bool IPNBSVTD_SetFileBCNext(byte ucDeviceIndex);
[DllImport("IPNBSVTD.dll")] public static extern bool IPNBSVTD_SetFileBCPause(byte ucDeviceIndex, bool bPause);
[DllImport("IPNBSVTD.dll")] public static extern bool IPNBSVTD_SetFileBCPrevious(byte ucDeviceIndex);
[DllImport("IPNBSVTD.dll")] public static extern uint IPNBSVTD_GetBCFileCurrentPlayPos(byte ucDeviceIndex, ref uint pBcFileLen);
[DllImport("IPNBSVTD.dll")] public static extern bool IPNBSVTD_SetFileBCPlayListPos(byte ucDeviceIndex, byte ucPlayListPos);
}