WebTelnetScreenGetFieldCount Function

Action

Returns total number of fields in currently rendered screen in an active Telnet connection.

Include file

WebAPI.bdh

Syntax

WebTelnetScreenGetFieldCount(in hWeb : number ): number;

Return value

-1 on error
Positive number or 0 representing total number of currently rendered fields

Parameter	Description
hWeb	Valid handle to a Web connection created by WebTcpipConnect and set to Telnet mode using WebTcpipSetTelnetMode.

Example

dcltrans  transaction TInit
  begin
    StrSetHostCP(1148);
    // 1148  (IBM EBCDIC - International (500 + Euro))
  end TInit;
   
  transaction TMain
  var
    hWeb0       : number;
    nFieldPos   : number;
    nFieldCount : number;
    nFieldCol   : number;
    nFieldRow   : number;
    nScrRows    : number;
    nScrCols    : number;
  
  begin
    WebTcpipConnect(hWeb0, "My.TelnetHost.IP", WEB_PORT_TELNET); // Port: 23
    WebTcpipSetTelnetMode(hWeb0, TERMINAL_TYPE_3270, 80, 24, true, TELNET_MODEOPT_RFC_1576 | TELNET_MODEOPT_AUTO_RECV);
    WebTelnetRecvCommand(hWeb0, TELNET_CMD_DO, TELNET_OPT_TerminalType);
    WebTelnetSendCommand(hWeb0, TELNET_CMD_WILL, TELNET_OPT_TerminalType);
    WebTelnetRecvSubNegotiation(hWeb0, TELNET_OPT_TerminalType);
    WebTelnetSendTerminalType(hWeb0, "IBM-3278-2-E");
    WebTelnetRecvCommand(hWeb0, TELNET_CMD_DO, TELNET_OPT_EndOfRecord);
    WebTelnetRecvCommand(hWeb0, TELNET_CMD_WILL, TELNET_OPT_EndOfRecord);
    WebTelnetRecvCommand(hWeb0, TELNET_CMD_DO, TELNET_OPT_TransmitBinary);
    WebTelnetRecvCommand(hWeb0, TELNET_CMD_WILL, TELNET_OPT_TransmitBinary);
    WebTelnetSendCommand(hWeb0, TELNET_CMD_WILL, TELNET_OPT_EndOfRecord);
    WebTelnetSendCommand(hWeb0, TELNET_CMD_DO, TELNET_OPT_EndOfRecord);
    WebTelnetSendCommand(hWeb0, TELNET_CMD_WILL, TELNET_OPT_TransmitBinary);
    WebTelnetSendCommand(hWeb0, TELNET_CMD_DO, TELNET_OPT_TransmitBinary);
    WebTelnetRecvCommand(hWeb0, TELNET_CMD_DO, TELNET_OPT_TransmitBinary);
    WebTelnetRecvCommand(hWeb0, TELNET_CMD_WILL, TELNET_OPT_TransmitBinary);
    WebTelnetRecvRecord(hWeb0);
    WebTelnetRecvRecord(hWeb0);
    WebTelnetSendRecord(hWeb0,
      
      "\h88001181A600000B0100005000180050" // ····¦······P···P 00000000
 
      "\h001800168186000800F4F1F1F2F2F3F3" // ·········ôññòòóó 00000010
 
      "\hF4F4F5F5F6F6F7F7000D81870400F0F1" // ôôõõöö÷÷······ðñ 00000020
 
      "\hF1F2F2F4F40007818800010200178181" // ñòòôô··········· 00000030
 
      "\h01000050001801000100030004000909" // ···P············ 00000040
 
      "\h0C0780001B81858200090C0000000007" // ················ 00000050
      
      "\h00000002B900250100F103C301360006" // ····¹·%··ñ·Ã·6·· 00000060
 
      "\h81990000001281970000080008000101" // ················ 00000070
 
      "\h000B0401C0C1000981A80200F0FFFFFF" // ····ÀÁ···¨··ð··· 00000080
      
      "\hFF000C81950000081108110101000F81" // ················ 00000090
 
      "\h80A687888185869997A89580"); // ·¦·······¨··     000000A0  
    
    WebTelnetRecvRecord(hWeb0);
    WebTelnetRecvRecord(hWeb0);
 
    WebTelnetSendRecord(hWeb0, "\h7D5B6F115B6F" +StrToHostCP("1"));
    WebTelnetScreenRecvRecordsUntilStatus(hWeb0, "Keyboard Locked", "false");
    WebTelnetSendRecord(hWeb0, "\h7D5BF0115BF0" + StrToHostCP("12"));
    WebTelnetScreenRecvRecordsUntilText(hWeb0, 6, 22, "Choice:");    
    WebTelnetSendRecord(hWeb0, "\h7D5A5E115A5E" + StrToHostCP("12"));
    WebTelnetScreenRecvRecordsUntilField(hWeb0, 1, "");
    nFieldCount := WebTelnetScreenGetFieldCount(hWeb0);

    if nFieldCount = 1 then
      WebTelnetScreenGetFieldProperties(hWeb0, 1, nFieldCol, nFieldRow, 0);
      if (nScrCols >= nFieldCol) and (nScrRows >= nFieldRow) then
        nFieldPos := WebTelnetScreenGetFieldIndex(hWeb0,nFieldCol, nFieldRow);
        if nFieldPos = 1 then
          WebTcpipShutdown(hWeb0);
        end;
      end;
   end;
  end TMain;