Call the Huawei SMS development kit to send long messages (C # cmpp3.0)

Description: a stable text message processing program must be developed within a short period of time to meet special requirements. The mobile text message development kit is used, and no relevant documentation is found for long text message sending, as a code farmer, I can only find some non-mainstream methods to solve the problem.

API Declaration

       [DllImport("SMEIDLL.DLL",CharSet = CharSet.Unicode)]       public static extern int CMPP3Submit(        [MarshalAs(UnmanagedType.U1)] byte byPKTotal,        [MarshalAs(UnmanagedType.U1)] byte byPKNumber,        [MarshalAs(UnmanagedType.U1)] byte SRR,        [MarshalAs(UnmanagedType.U1)] byte byMsglevel,        [MarshalAs(UnmanagedType.LPStr)]  StringBuilder ServiceSubType,        [MarshalAs(UnmanagedType.U1)] byte byFeeUserType,        [MarshalAs(UnmanagedType.LPStr)]  StringBuilder sFeeAddr,        [MarshalAs(UnmanagedType.U1)] byte byFeeTerminalType,        [MarshalAs(UnmanagedType.U1)] byte PID,        UInt32 Default_ID,        [MarshalAs(UnmanagedType.U1)] byte UDHI,        [MarshalAs(UnmanagedType.U1)] byte DCS,       [MarshalAs(UnmanagedType.LPStr)]  StringBuilder sSPID,       [MarshalAs(UnmanagedType.LPStr)]  StringBuilder sFeeType,       [MarshalAs(UnmanagedType.LPStr)]  StringBuilder sFeeCode,       [MarshalAs(UnmanagedType.LPStr)]  StringBuilder Schedule,       [MarshalAs(UnmanagedType.LPStr)]  StringBuilder Expire,       [MarshalAs(UnmanagedType.LPStr)]  StringBuilder OrgAddr,       [MarshalAs(UnmanagedType.U1)] byte byUserNum,       [MarshalAs(UnmanagedType.LPStr)]  StringBuilder sDestAddrs,       [MarshalAs(UnmanagedType.U1)] byte byDestTerminalType,       UInt32 UDLen,       String UserData,       [MarshalAs(UnmanagedType.LPStr)]  StringBuilder sLinkID,     [MarshalAs(UnmanagedType.LPStr)] StringBuilder byMsgID);

 

Send and call long messages. analyze them carefully.

Udhi = 1; int headlenght = 7; // header length string mtmsg = _ message. strsmscontent; byte [] messageucs2 = encoding. bigendianunicode. getbytes (mtmsg); int messageucs2len = messageucs2.length; int maxmessagelen = 139; If (latency> maxmessagelen) {int messageucs2count = Bytes/(maxmessagelen-headlenght) + 1; // The number of messages sent with long SMS messages: bypktotal = (byte) messageucs2count; byte [] tp_udhihead = new byte [Head Lenght]; tp_udhihead [0] = 0x06; tp_udhihead [1] = 0x08; tp_udhihead [2] = 0x04; tp_udhihead [3] = 0x00; tp_udhihead [4] = 0x00; tp_udhihead [5] = (byte) messageucs2count; tp_udhihead [6] = 0x01; // The first for (INT I = 0 by default; I <messageucs2count; I ++) {bypknumber = (byte) (I + 1); // THE NUMBER OF THE SAME TEXT MESSAGE tp_udhihead [6] = (byte) (I + 1); byte [] msgcontent; if (I! = Messageucs2count-1) {// not the last msgcontent = biconvert. byteadd (tp_udhihead, messageucs2, I * (maxmessagelen-headlenght), (I + 1) * (maxmessagelen-headlenght); udlen = (uint) msgcontent. length;} else {msgcontent = biconvert. byteadd (tp_udhihead, messageucs2, I * (maxmessagelen-headlenght), messageucs2len); msgcontent = biconvert. byteadd (msgcontent, new byte [] {0}, 0, 1); udlen = (uint) msgcontent. length-1;} string str_msgcontent = encoding. unicode. getstring (msgcontent); int issub = SMEI. partition (bypktotal, bypknumber, SRR, bymsglevel, servicesubtype, struct, struct, sequence, PID, default_id, udhi, DCs, sspid, sfeetype, struct, schedule, expire, orgaddr, byusernum, sdestaddrs, bydestterminaltype, udlen, str_msgcontent, slinkid, bymsgid );}}

 

It is not the best method, but there is no pressure on ultra-long text messages to solve the problem.