詳細(xì)介紹C#調(diào)用API

作者：佚名 2009-08-07 16:10:20

本文詳細(xì)介紹C#調(diào)用API，使用C#的委托和IntPtr方法實(shí)現(xiàn).由于我使用C#剛兩天,這是我寫的第一個C#程序,因此例程寫的可能有點(diǎn)粗糙,但是編譯和運(yùn)行完全沒有問題。

該例程演示了C#調(diào)用API函數(shù)，而且回調(diào)函數(shù)的參數(shù)包含結(jié)構(gòu)體，使用C#的委托和IntPtr方法實(shí)現(xiàn).由于我使用C#剛兩天,這是我寫的***個C#程序,因此例程寫的可能有點(diǎn)粗糙,但是編譯和運(yùn)行完全沒有問題.CMPP2.0的API封裝成了標(biāo)準(zhǔn)C調(diào)用API的方法，提供以下三個接口，使用的時候只要有CMPPAPI.dll就可以了.

#define DllExport extern "C" __declspec(dllexport)  
DllExport int __stdcall Cmpp2Start(LPCTSTR pchSmgIp  
int nMtPort  
int nMoPort  
LPCTSTR pchUserName  
LPCTSTR pchUserPwd  
unsigned char uchVersion  
void (__stdcall *OnSmgMsg)(CMPP_SMGTOSP* css)  
int nConnType  
void (__stdcall *OnLogFile)(LPCTSTR str));  
 
DllExport int __stdcall Cmpp2Submit(  
unsigned char uchPKtotal  
unsigned char uchPKnumber  
unsigned char uchNeedreport  
unsigned char uchMsglevel  
LPCTSTR pchServiceid  
unsigned char uchFeeusertype  
LPCTSTR pchFeeterminalid  
unsigned char uchTppid  
unsigned char uchTpudhi  
unsigned char uchMsgfmt  
LPCTSTR pchMsgsrc  
LPCTSTR pchFeetype  
LPCTSTR pchFeecode  
LPCTSTR pchValidtime  
LPCTSTR pchAttime  
LPCTSTR pchSrcid  
unsigned char uchDestusrtl  
LPCTSTR pchDestterminalid  
unsigned char uchMsglen  
LPCTSTR pchMsgcontent);  
 
DllExport int __stdcall Cmpp2Release();

C#調(diào)用API,如何聲明結(jié)構(gòu)體,如何使用委托實(shí)現(xiàn)回調(diào)函數(shù),如何實(shí)現(xiàn)使用自定義結(jié)構(gòu)體作為參數(shù)的回調(diào)函數(shù),請仔細(xì)查看例程源碼。注意:CMPPAPI.dll要和可執(zhí)行文件放到同一個目錄下,或者放到可執(zhí)行文件能找到的目錄,或者放到系統(tǒng)目錄下(如:C:\windows \system32).

//Class1.cs  
 
using System;  
// 該名稱空間包含了在Visual C#中調(diào)用API的一些必要集合  
using System.Runtime.InteropServices;  
// 使用Sleep方法需要的命名空間  
using System.Threading;  
 
namespace CMPPAPI_Sample_CSharp  
{  
 
[StructLayout(LayoutKind.Sequential, Pack = 1)]  
public struct CMPP_HEAD  
{  
public uint nTotalLength;  
public uint nCommandId;  
public uint nSeqId;  
}  
 
[StructLayout(LayoutKind.Sequential, Pack = 1)]  
public struct CMPP_CONNECT  
{  
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 6)]  
public string sSourceAddr;  
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 16)]  
public string sAuthSource;  
public byte cVersion;  
public uint nTimeStamp;  
}  
 
[StructLayout(LayoutKind.Sequential, Pack = 1)]  
publicstruct CMPP_CONNECT_RESP  
{  
public byte uchStatus;  
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 16)]  
public string sAuthISMG;  
public byte cVersion;  
}  
 
[StructLayout(LayoutKind.Sequential, Pack = 1)]  
publicstruct CMPP_SUBMIT_RESP  
{  
public long nMsgid;  
public byte uchResult;  
}  
 
[StructLayout(LayoutKind.Sequential, Pack = 1)]  
publicstruct CMPP_STATUS_REPORT  
{  
public long nMsgid;  
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 7)]  
public string sStat;  
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 10)]  
public string sSubmitTime;  
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 10)]  
public string sDoneTime;  
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 21)]  
public string sDestTerminalId;  
public uint nSmscSeq;  
}  
 
[StructLayout(LayoutKind.Sequential, Pack = 1)]  
publicstruct CMPP_MO_MSGCONTENT  
{  
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 160)]  
public string sMsgcontent;  
public CMPP_STATUS_REPORT csr;  
}  
 
[StructLayout(LayoutKind.Sequential, Pack = 1)]  
publicstruct CMPP_DELIVER  
{  
public longnMsgid;  
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 21)]  
public string sDestid;  
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 10)]  
public string sServiceid;  
public byteuchTppid;  
public byteuchTpudhi;  
public byteuchMsgfmt;  
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 21)]  
public string sSrcterminalid;  
public byteuchRegisteredDelivery;  
public byteuchMsglength;  
 
public CMPP_MO_MSGCONTENT mo_msg;  
 
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 8)]  
public string sReserved;  
}  
 
[StructLayout(LayoutKind.Sequential, Pack = 1)]  
publicstruct CMPP_SUBMIT  
{  
public longnMsgid;  
public byteuchPkTotal;  
public byteuchPkNumber;  
public byteuchRegisteredDelivery;  
public byteuchMsgLevel;  
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 10)]  
public string sServiceId;  
public byteuchFeeUserType;  
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 21)]  
public string sFeeTerminalId;  
public byteuchTpPid;  
public byteuchTpUdhi;  
public byteuchMsgFmt;  
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 6)]  
public string sMsgSrc;  
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 2)]  
public string sFeeType;  
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 6)]  
public string sFeeCode;  
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 17)]  
public string sValidTime;  
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 17)]  
public string sAtTime;  
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 21)]  
public string sSrcId;  
public byte uchDstUsrTl;  
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 21*100)]  
public string sDstTerminalId;  
public byteuchMsgLength;  
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 160)]  
public string sMsgContent;  
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 8)]  
public string sReserved;  
}  
 
[StructLayout(LayoutKind.Sequential, Pack = 1)]  
publicstruct CMPP_QUERY  
{  
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 8)]  
public string sTime;  
public byte uchQueryType;  
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 10)]  
public string sQueryCode;  
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 8)]  
public string sReserved;  
}  
 
[StructLayout(LayoutKind.Sequential, Pack = 1)]  
publicstruct CMPP_QUERY_RESP  
{  
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 8)]  
public string sTime;  
public byte uchQueryType;  
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 10)]  
public string sQueryCode;  
public uint nMTTLMsg;//從SP接收消息總數(shù).  
public uint nMTTLUsr;//從SP接收用戶總數(shù).  
public uint nMTScs; //成功轉(zhuǎn)發(fā)數(shù)量.  
public uint nMTWT; //待轉(zhuǎn)發(fā)數(shù)量.  
public uint nMTFL; //轉(zhuǎn)發(fā)失敗數(shù)量.  
public uint nMOScs; //向SP成功送達(dá)數(shù)量.  
public uint nMOWT; //向SP待送達(dá)數(shù)量.  
public uint nMOFL; //向SP送達(dá)失敗數(shù)量.  
}  
 
[StructLayout(LayoutKind.Sequential, Pack = 1)]  
publicstruct CMPP_CANCEL  
{  
public long nMsgid;  
}  
 
[StructLayout(LayoutKind.Sequential, Pack = 1)]  
publicstruct CMPP_CANCEL_RESP  
{  
public byte uchSuccessId;  
}  
 
[StructLayout(LayoutKind.Sequential, Pack = 1)]  
publicstruct CMPP_ACTIVETEST_RESP  
{  
public byte uchReserved;  
}  
 
[StructLayout(LayoutKind.Sequential, Pack = 1)]  
publicstruct CMPP_BODY  
{  
public CMPP_CONNECT_RESP pk_connectresp;  
public CMPP_SUBMIT_RESPpk_submitresp;  
public CMPP_QUERY_RESPpk_queryre