c++函數轉c#函數的代碼怎么寫

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代碼如下:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;
using System.Windows.Forms;

namespace FDEP
{
    /// <summary>
    /// 羅旭成
    /// 深證通函數轉換
    /// </summary>
    public class ImportDLL
    {
        #region * 常量定義
        //*****************************************************************
        //協議類型常量
        //名稱                             定義值     說明
        //MR_PROTOCOLTYPE_MRSTANDAND       0x01      FDEP規定的標識業務協議
        //MR_PROTOCOLTYPE_SELFCUSTOM       0xFF      用戶自定義協議類型
        /// <summary>
        /// 協議類型常量
        /// </summary>
        public const uint MR_PROTOCOLTYPE_MRSTANDAND = 0x01; // SBSP標準業務協議。
        public const uint MR_PROTOCOLTYPE_SELFCUSTOM = 0xFF; // 用戶自定義協議類型。
        //*****************************************************************
        //消息標識位常量
        //名稱                             定義值     說明
        //MR_MSGFLAG_PERSIST               0x01      持久消息標志，用于可靠傳輸。目前暫不支持
        //MR_MSGFLAG_COMPRESS              0x02      壓縮標志，需進行壓縮傳輸
        /// <summary>
        /// 消息標志位常量
        /// </summary>

        public const uint MR_MSGFLAG_PERSIST = 0x01; // 持久消息標志，用于可靠傳輸。
        public const uint MR_MSGFLAG_COMPRESS = 0x02; // 壓縮標志，需進行壓縮傳輸。
        //*****************************************************************
        //長度常量
        //名稱                             定義值     說明
        //MR_MAXLEN_ADDR                   64        用戶標識及應用標識的最大長度
        //MR_MAXLEN_PKGID                  64        消息包標識的最大長度
        //MR_MAXLEN_USERDATA               256       用戶保留數據的最大長度
        //MR_FIXLEN_EXPIREDABSTIME         20        過期絕對時間固定長度
        /// <summary>
        /// 消息標志位常量
        /// </summary>
        public const int MR_MAXLEN_ADDR = 64; // 用戶標識及應用標識的最大長度。
        public const int MR_MAXLEN_PKGID = 64; // 消息包標識的最大長度。
        public const int MR_MAXLEN_USERDATA = 256; // 用戶保留數據的最大長度。
        public const int MR_FIXLEN_EXPIREDABSTIME = 20; // 過期絕對時間固定長度。
        //*****************************************************************
        //函數返回錯誤值
        //MR_ERRCODE_OK                   0
        //MR_ERRCODE_PARAMERR             -1
        //MR_ERRCODE_CONNERR              -2
        //MR_ERRCODE_TIMEEXPIRED          -3
        //MR_ERRCODE_TIMEOUT              -4
        //MR_ERRCODE_NOMSG                -5
        //MR_ERRCODE_BUFTOOSHORT          -6
        //MR_ERRCODE_BUFTOOBIG            -7
        //MR_ERRCODE_SYSERROR             -8
        #endregion

        #region * 結構體的定義
        /// <summary>
        /// 用來表示一條消息的各種屬性
        /// </summary>
        [StructLayout(LayoutKind.Sequential)]
        public struct STUsgProperty
        {
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = MR_MAXLEN_ADDR)]
            public string m_szSourceUserID;//MR_MAXLEN_ADDR 源用戶標識，以“\0”結尾的字符串
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = MR_MAXLEN_ADDR)]
            public string m_szSourceAppID;//MR_MAXLEN_ADDR 源應用標識，以“\0”結尾的字符串
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = MR_MAXLEN_ADDR)]
            public string m_szDestUserID;//MR_MAXLEN_ADDR 目的用戶標識，以“\0”結尾的字符串
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = MR_MAXLEN_ADDR)]
            public string m_szDestAppID;//MR_MAXLEN_ADDR 目的應用標識，以“\0”結尾的字符串
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = MR_MAXLEN_PKGID)]
            public string m_szPkgID;//MR_MAXLEN_PKGID 消息包的包標識，以“\0”結尾的字符串，或者由用戶調用MrCreatePkgID函數生成，或者為空(即'\0')
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = MR_MAXLEN_PKGID)]
            public string m_szCorrPkgID;//MR_MAXLEN_PKGID 相關包標識，以“\0”結尾的字符串，供用戶自用
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = MR_MAXLEN_USERDATA)]
            public string m_szUserData1;//MR_MAXLEN_USERDATA 用戶數據1，以“\0”結尾的字符串，供用戶自用
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = MR_MAXLEN_USERDATA)]
            public string m_szUserData2;//MR_MAXLEN_USERDATA 用戶數據2，以“\0”結尾的字符串，供用戶自用
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = MR_FIXLEN_EXPIREDABSTIME)]
            public string m_szExpiredAbsTime;//MR_FIXLEN_EXPIREDABSTIME 該消息的過期時間，以“\0”結尾的字符串，格式為“YYYY-MM-DD HH:MM:SS”。也可以置空，此時如果目的用戶不在線，或者目的應用未連接，則消息立即過期。
            public byte m_ucFlag;//消息標識，有8個二進制位組成，各位含義如下:位0 --為1表示持久消息，需可靠傳輸，暫不支持；
            //位1 --為1表示消息需壓縮傳輸
            public byte m_ucProtocolType;//協議類型標識，取值可以是下列之一:MR_PROTOCOLTYPE_MRSTANDAND  0x01  FDEP規定的標準業務協議
            //MR_PROTOCOLTYPE_SELFCUSTOM  0xFF  用戶自定義協議類型
        }

        /// <summary>
        /// 用來定義與接入客戶端建立連接所需的各種信息
        /// </summary>
        [StructLayout(LayoutKind.Sequential)]
        public struct STUConnInfo
        {
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 16)]
            public string m_szMRIP;//接入客戶端消息路由器的IP地址，以"\0"結尾的字符串，格式為“xxx.xxx.xxx.xxx”
            public UInt16 m_usMRPort;//接入客戶端消息路由器的連接端口
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 16)]
            public string m_szMRIPBak;//備用消息路由器的IP地址，不設置備用消息路由器時可以為空
            public UInt16 m_usMRPortBak;//備用消息路由器的連接端口，不設置備用消息路由器時可以為0
        }
        #endregion

        #region * 函數的定義
        /// <summary>
        /// 定義的回調函數
        /// </summary>
        /// <param name="psPkg">要發送的消息包緩沖區</param>
        /// <param name="iPkgLen">緩沖區中的消息包長度</param>
        /// <param name="pMsgPropery">消息包屬性</param>
        /// <param name="pvUserData">供回調函數使用的用戶數據</param>
        /// <returns></returns>
        [UnmanagedFunctionPointerAttribute(CallingConvention.StdCall)]
        public delegate int OnReceiveCallBack(string psPkg, int iPkgLen, ref STUsgProperty pMsgPropery, IntPtr pvUserData);
        //typedef int (*OnReceiveCallBack)(const char* psPkg, int iPkgLen, const STUMsgProperty* pMsgPropery, void* pvUserData);

        /// <summary>
        /// 1.初始化，獲取相關資源，并嘗試與接入客戶端FDAP建立連接
        /// </summary>
        /// <param name="psAppID">本應用的應用標識</param>[in]
        /// <param name="psPasswd">本應用在接入客服端設置的密碼，密碼必須與預設的匹配才能繼續</param>[in]
        /// <param name="onReceive">接收到消息包時的回調函數</param>[in]
        /// <param name="oConnInfo">接入客戶端連接信息</param>[in]
        /// <param name="pvUserData">供回調函數使用的用戶數據</param>[in]
        /// <returns>NULL 初始化失敗 非NULL 初始化成功，返回一個連接句柄，給句柄將作為其他函數調用的參數</returns>
        [DllImport("mrapi.dll", EntryPoint = "MrInit", CallingConvention = CallingConvention.StdCall, SetLastError = true, CharSet = CharSet.Ansi)]
        public static extern IntPtr MrInit(string psAppID, string psPasswd, OnReceiveCallBack onReceive, STUConnInfo oConnInfo, IntPtr pvUserData);
        //void* _stdcall MrInit(const char* psAppID, const char* psAppPasswd,OnReceiveCallBack onReceive,const STUConnInfo oConnInfo, void* pvUserData);

        /// <summary>
        /// 2.初始化，獲取相關資源，并嘗試與接入客戶端FDAP建立連接
        /// </summary>
        /// <param name="psUserCertID">本應用的用戶標識</param>[in]
        /// <param name="psAppID">本應用的應用標識</param>[in]
        /// <param name="psPasswd">本應用在接入客服端設置的密碼，密碼必須與預設的匹配才能繼續</param>[in]
        /// <param name="onReceive">接收到消息包時的回調函數</param>[in]
        /// <param name="oConnInfo">接入客戶端連接信息</param>[in]
        /// <param name="pvUserData">供回調函數使用的用戶數據</param>[in]
        /// <returns>NULL 初始化失敗 非NULL 初始化成功，返回一個連接句柄，給句柄將作為其他函數調用的參數</returns>
        [DllImport("mrapi.dll", EntryPoint = "MrInit1", CallingConvention = CallingConvention.StdCall, SetLastError = true, CharSet = CharSet.Ansi)]
        public static extern IntPtr MrInit1(string psUserCertID, string psAppID, string psPasswd, OnReceiveCallBack onReceive, STUConnInfo oConnInfo, IntPtr pvUserData);

        /// <summary>
        /// 3.連接FDAP時的初始化函數。該函數對FDEAPI進行初始化，分配獲取相關資源，并嘗試與接入客戶端建立通信連接
        /// </summary>
        /// <param name="pHandle">函數返回的句柄，該句柄將作為其他函數調用的參數</param>[out]
        /// <param name="psUserCertID">本應用的用戶標識</param>[in]
        /// <param name="psAppID">本應用的應用標識</param>[in]
        /// <param name="psPasswd">本應用在接入客戶端設置的密碼，密碼必須與預設的匹配才能繼續</param>[in]
        /// <param name="pMsgProperty">消息包屬性</param>[in]
        /// <param name="onReceive">接收到消息包時的回調函數</param>[in]
        /// <param name="oConnInfo">接入客戶端連接信息</param>[in]
        /// <param name="pvUserData">供回調函數使用的用戶數據</param>[in]
        /// <param name="iThreadCount">調用回頭函數OnReceive的線程數目</param>[in]
        /// <returns>無</returns>
        [DllImport("mrapi.dll", EntryPoint = "MrInit1Ex1", CallingConvention = CallingConvention.StdCall, SetLastError = true, CharSet = CharSet.Ansi)]
        public static extern IntPtr MrInit1Ex1(out IntPtr pHandle, string psUserCertID, string psAppID, string psPasswd, ref STUsgProperty pMsgProperty, OnReceiveCallBack onReceive, STUConnInfo oConnInfo, IntPtr pvUserData, int iThreadCount);

        /// <summary>
        /// 4.連接FDAP時的初始化函數。該函數對FDEAPI進行初始化，分配獲取相關資源，并嘗試與接入客戶端建立通信連接
        /// </summary>
        /// <param name="pHandle">函數返回的句柄，該句柄將作為其他函數調用的參數</param>[out]
        /// <param name="psAppID">本應用的應用標識</param>[in]
        /// <param name="psPassws">本應用在接入客戶端設置的密碼，密碼必須與預設的匹配才能繼續</param>[in]
        /// <param name="pOnRecvMsgPropery">這是回調函數OnReceive的接收條件，如果不需要任何條件，則可以填NULL</param>[in]
        /// <param name="onReceive">接收到消息包時的回調函數</param>[in]
        /// <param name="pConnInfo">接入客戶端連接信息</param>[in]
        /// <param name="pvUserData">供回調函數使用的用戶數據</param>[in]
        /// <param name="iThreadCount">調用回頭函數OnReceive的線程數目</param>
        /// <returns>無</returns>
        [DllImport("mrapi.dll", EntryPoint = "MrInit2", CallingConvention = CallingConvention.StdCall, SetLastError = true, CharSet = CharSet.Ansi)]
        public static extern IntPtr MrInit2(out IntPtr pHandle, string psAppID, string psPassws, ref STUsgProperty pOnRecvMsgPropery, OnReceiveCallBack onReceive, ref STUConnInfo pConnInfo, IntPtr pvUserData, int iThreadCount);
        //void*  _stdcall MrInit2(void** ppHandle, const char* psAppID, const char* psAppPasswd, STUMsgProperty* pOnRecvMsgPropery,OnReceiveCallBack onReceive,const STUConnInfo* pConnInfo, void* pvUserData, int iThreadCount);

        /// <summary>
        /// 5.判斷與交換中樞的連接是否正常
        /// </summary>
        /// <param name="pHandle">連接句柄，調用MrInit時返回的值</param>
        /// <returns>0不正常 1正常</returns>
        [DllImport("mrapi.dll", EntryPoint = "MrIsLinkOK", CallingConvention = CallingConvention.StdCall, SetLastError = true, CharSet = CharSet.Ansi)]
        public static extern int MrIsLinkOK(IntPtr pHandle);
        //int  _stdcall MrIsLinkOK(void* pHandle)

        /// <summary>
        /// 6.消息包標識生成函數
        /// </summary>
        /// <param name="pHandle">連接句柄，調用MrInit時返回的值</param>[in]
        /// <param name="szPkgID">生成的消息包標識</param>[out]
        /// <returns>0 成功 其他 失敗</returns>
        [DllImport("mrapi.dll", EntryPoint = "MrCreatePkgID", CallingConvention = CallingConvention.StdCall, SetLastError = true, CharSet = CharSet.Ansi)]
        public static extern int MrCreatePkgID(IntPtr pHandle, StringBuilder szPkgID);
        //int _stdcall MrCreatePkgID(void* pHandle,char szPkgID[MR_MAXLEN_PKGID])

        /// <summary>
        /// 7.消息包發送函數
        /// </summary>
        /// <param name="pHandle">連接句柄，調用MrInit時返回的值</param>[in]
        /// <param name="psPkg">要發送的消息包緩沖區</param>[in]
        /// <param name="iPkgLen">緩沖區中的消息包長度</param>[in]
        /// <param name="pMsgPropery">消息包屬性</param>[in/out]
        /// <param name="iMillSecTimeo">以毫米為單位的接收最大超時時間</param>[in]
        /// <returns>0 成功 其他 失敗</returns>
        [DllImport("mrapi.dll", EntryPoint = "MrSend", CallingConvention = CallingConvention.StdCall, SetLastError = true, CharSet = CharSet.Ansi)]
        public static extern int MrSend(IntPtr pHandle, string psPkg, int iPkgLen, ref STUsgProperty pMsgPropery, int iMillSecTimeo);
        //int _stdcall MrSend(void* pHandle,const char* psPkg,int iPkgLen,STUsgProperty* pMsgPropery,int iMillSecTimeo);

        /// <summary>
        /// 8.消息包接收函數1
        /// </summary>
        /// <param name="pHandle">連接句柄，調用MrInit時返回的值</param>[in]
        /// <param name="ppsPkg">雙指針，返回包所指向的內存</param>[out]
        /// <param name="piOutPkgLen">接收到消息包的實際長度</param>[out]
        /// <param name="pMsgPropery">接收條件</param>[in/out]
        /// <param name="iMillSecTimeo">以毫米為單位的接收最大超時時間</param>[in]
        /// <returns>0 成功 其他 失敗</returns>
        [DllImport("mrapi.dll", EntryPoint = "MrReceive1", CallingConvention = CallingConvention.StdCall, SetLastError = true, CharSet = CharSet.Ansi)]
        public static extern int MrReceive1(IntPtr pHandle, out IntPtr ppsPkg, out int piOutPkgLen, ref STUsgProperty pMsgPropery, int iMillSecTimeo);
        //int _stdcall MrReceive1(void* pHandle, char** ppsPkg, int* piOutPkgLen, STUMsgProperty* pMsgPropery, int iMillSecTimeo);

        /// <summary>
        /// 9.消息包內存釋放函數
        /// </summary>
        /// <param name="psPkg">由MrReceivel1函數的第二個參數返回的指針</param>[in]
        /// <returns>無</returns>
        [DllImport("mrapi.dll", EntryPoint = "MrReceive1_FreeBuf", CallingConvention = CallingConvention.StdCall, SetLastError = true, CharSet = CharSet.Ansi)]
        public static extern IntPtr MrReceive1_FreeBuf(string psPkg);
        //void _stdcall MrReceive1_FreeBuf(char* psPkg);

        /// <summary>
        /// 10.消息包瀏覽函數
        /// </summary>
        /// <param name="pHandle">連接句柄，調用MrInit時返回的值</param>[in]
        /// <param name="piOutPkgLen">接收到消息包的實際長度</param>[out]
        /// <param name="pMsgPropery">接收條件</param>[in/out]
        /// <param name="iMillSecTimeo">以毫米為單位的接收最大超時時間</param>[in]
        /// <returns>0 成功 其他 失敗</returns>
        [DllImport("mrapi.dll", EntryPoint = "MrBrowse", CallingConvention = CallingConvention.StdCall, SetLastError = true, CharSet = CharSet.Ansi)]
        public static extern int MrBrowse(IntPtr pHandle, out int piOutPkgLen, ref STUsgProperty pMsgPropery, int iMillSecTimeo);
        //int _stdcall MrBrowse(void* pHandle,  int* piOutPkgLen, STUMsgProperty* pMsgPropery, int iMillSecTimeo);

        /// <summary>
        /// 11.消息包接收函數2
        /// </summary>
        /// <param name="pHandle">連接句柄，調用MrInit時返回的值</param>[in]
        /// <param name="ppsPkg">雙指針，返回包所指向的內存</param>[out]
        /// <param name="piOutPkgLen">接收到消息包的實際長度</param>[out]
        /// <param name="iBufLenIn">消息包緩沖區大小</param>[out]
        /// <param name="pMsgPropery">接收條件</param>[in/out]
        /// <param name="iMillSecTimeo">以毫米為單位的接收最大超時時間</param>[in]
        /// <returns>0 成功 其他 失敗</returns>
        [DllImport("mrapi.dll", EntryPoint = "MrReceive2", CallingConvention = CallingConvention.StdCall, SetLastError = true, CharSet = CharSet.Ansi)]
        public static extern int MrReceive2(IntPtr pHandle, out IntPtr ppsPkg, out int piOutPkgLen, out int iBufLenIn, ref STUsgProperty pMsgPropery, int iMillSecTimeo);
        //int _stdcall MrReceive2(void* pHandle, char** ppsPkg, int* piOutPkgLen, int* iBufLenIn, STUMsgProperty* pMsgPropery, int iMillSecTimeo);

        /// <summary>
        /// 12.消息包接收函數3
        /// </summary>
        /// <param name="pHandle">連接句柄，調用MrInit時返回的值</param>[in]
        /// <param name="ppsPkg">雙指針，返回包所指向的內存</param>[out]
        /// <param name="piOutPkgLen">接收到消息包的實際長度</param>[out]
        /// <param name="piErrSXCode">交換錯誤的原因碼</param>[out]
        /// <param name="pMsgPropery">接收條件</param>[in/out]
        /// <param name="iMillSecTimeo">以毫米為單位的接收最大超時時間</param>[in]
        /// <returns>0 成功 其他 失敗</returns>
        [DllImport("mrapi.dll", EntryPoint = "MrReceive3", CallingConvention = CallingConvention.StdCall, SetLastError = true, CharSet = CharSet.Ansi)]
        public static extern int MrReceive3(IntPtr pHandle, out IntPtr ppsPkg, out int piOutPkgLen, out int piErrSXCode, ref STUsgProperty pMsgPropery, int iMillSecTimeo);
        //int _stdcall MrReceive3(void* pHandle, char** ppsPkg, int* piOutPkgLen, int* piErrSXCode, STUMsgProperty* pMsgPropery, int iMillSecTimeo);

        /// <summary>
        /// 13.消息包接收函數4
        /// </summary>
        /// <param name="pHandle">連接句柄，調用MrInit時返回的值</param>[in]
        /// <param name="ppsPkg">雙指針，返回包所指向的內存</param>[out]
        /// <param name="piOutPkgLen">接收到消息包的實際長度</param>[out]
        /// <param name="piErrSXCode">交換錯誤的原因碼</param>[out]
        /// <param name="pMsgPropery">接收條件</param>[in/out]
        /// <param name="iMillSecTimeo">以毫米為單位的接收最大超時時間</param>[in]
        /// <returns>0 成功 其他 失敗</returns>
        [DllImport("mrapi.dll", EntryPoint = "MrReceive4", CallingConvention = CallingConvention.StdCall, SetLastError = true, CharSet = CharSet.Ansi)]
        public static extern int MrReceive4(IntPtr pHandle, out IntPtr ppsPkg, out int piOutPkgLen, out int piErrSXCode, ref STUsgProperty pMsgPropery, int iMillSecTimeo);
        //int _stdcall MrReceive4(void* pHandle, char** ppsPkg, int* piOutPkgLen, int* piErrSXCode, STUMsgProperty* pMsgPropery, int iMillSecTimeo);

        /// <summary>
        /// 14.釋放資源
        /// </summary>
        /// <param name="pHandle">連接句柄，調用MrInit時返回的值</param>
        /// <returns>無</returns>
        [DllImport("mrapi.dll", EntryPoint = "MrDestroy", CallingConvention = CallingConvention.StdCall, SetLastError = true, CharSet = CharSet.Ansi)]
        public static extern IntPtr MrDestroy(IntPtr pHandle);
        //void _stdcall MrDestroy(void* pHandle)

        /// <summary>
        /// 15.取得本API的版本號
        /// </summary>
        /// <param name="psBufVersion">返回的版本號</param>
        /// <param name="iBufLen">版本號長度</param>
        /// <returns>無</returns>
        [DllImport("mrapi.dll", EntryPoint = "MrGetVersion", CallingConvention = CallingConvention.StdCall, CharSet = CharSet.Ansi)]
        public static extern IntPtr MrGetVersion(StringBuilder psBufVersion, int iBufLen);
        //void _stdcall MrGetVersion(char* psBufVersion,int iBufLen);

        /// <summary>
        /// 16.注冊包下推條件
        /// </summary>
        /// <param name="pHandle">連接句柄，調用MrInit時返回的值<</param>
        /// <param name="pMsgPropery">消息的結構實體</param>
        /// <param name="iType">0 增加一個條件 1 刪除一個條件 2 清空所有條件</param>
        /// <returns>0 成功 其他 失敗</returns>
        [DllImport("mrapi.dll", EntryPoint = "MrRegRecvCondition", CallingConvention = CallingConvention.StdCall, SetLastError = true, CharSet = CharSet.Ansi)]
        public static extern int MrRegRecvCondition(IntPtr pHandle, ref STUsgProperty pMsgPropery, int iType);
        //int _stdcall MrRegRecvCondition(void* pHandle,STUMsgProperty* pMsgPropery,int iType);
        #endregion
    }
}

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