RPC HELP Tutorial Tutorial Source Code

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Tutorial Source Code

   unit tut1;
   	
   interface
     
     uses
       Windows, Messages, SysUtils, Classes, Graphics, Controls, 
       Forms, Dialogs, Trpcb, RPCConf1,     StdCtrls, MFunStr;
     
     type
       TForm1 = class(TForm)
       brkrRPCBroker1: TRPCBroker;
       ListBox1: TListBox;
       Button1: TButton;
       Name: TEdit;
       RightMargin: TEdit;
       FormFeed: TEdit;
       OpenExecute: TEdit;
       CloseExecute: TEdit;
       PageLength: TEdit;
       BackSpace: TEdit;
       Label1: TLabel;
       Label2: TLabel;                 
       Label3: TLabel;
       Label4: TLabel;
       Label5: TLabel;
       Label6: TLabel;
       Label7: TLabel;
       procedure FormCreate(Sender: TObject);
       procedure Button1Click(Sender: TObject);
       procedure ListBox1Click(Sender: TObject);
       procedure FormDestroy(Sender: TObject);
       private 
     {Private declarations}
     public
     {Public declarations}
       // Added declaration of TermTypeList.
       TermTypeList: TStringList;
     end;
     	
     var
     Form1: TForm1;
     
   
   implementation      
   
   {$R *.DFM}
   
     procedure TForm1.FormCreate(Sender: TObject);
     var 
       ServerStr: String;
       PortStr: String;
     begin
       TermTypeList:=TStringList.Create;
       // Get the correct port and server from the Registry.
       if GetServerInfo(ServerStr,PortStr)<> mrCancel then begin {connectOK begin}       
         brkrRPCBroker1.Server:=ServerStr;
         brkrRPCBroker1.ListenerPort:=StrToInt(PortStr);
         // Establish a connection to the RPC Broker server.
         try
           brkrRPCBroker1.Connected:=True;
           if not brkrRPCBroker1.CreateContext('ZxxxTT TERMTYPE') then
             Application.Terminate;
         except
           on EBrokerError do begin {error begin}
             ShowMessage('Connection to server could not be established!');
             Application.Terminate;          
           end;  {error end}
         end;  {try end}      
       end else  {connectOK end}
       Application.Terminate;
     end;
     
     procedure TForm1.Button1Click(Sender: TObject);
     var
       i: integer;
     begin
       brkrRPCBroker1.RemoteProcedure:='ZxxxTT LIST';    
       try
         begin {call begin}
           brkrRPCBroker1.Call;
           for i:=0 to (brkrRPCBroker1.Results.Count-1) do begin {copy begin}
           	ListBox1.Items.Add(piece(brkrRPCBroker1.Results[i],'^',2));
             // Added line.
             TermTypeList.Add(brkrRPCBroker1.Results[i]);        
           end; {copy end}              
         end; {call end}
       except
       on EBrokerError do begin
         ShowMessage('A problem was encountered communicating with the server.');
       end; {try end}
     end;
     
     procedure TForm1.ListBox1Click(Sender: TObject);
     var
       ien: String;
     begin
       if (ListBox1.ItemIndex <> -1) then begin {displayitem begin}                                          
         ien:=piece(TermTypeList[ListBox1.ItemIndex],'^',1);
         brkrRPCBroker1.RemoteProcedure:='ZxxxTT RETRIEVE';
         brkrRPCBroker1.Param[0].Value := ien;
         brkrRPCBroker1.Param[0].PType := literal;
         try
           begin  {call code begin}  
             brkrRPCBroker1.Call;
             Name.Text:=piece(brkrRPCBroker1.Results[0],'^',1);
             RightMargin.Text:=piece(brkrRPCBroker1.Results[0],'^',2);
             FormFeed.Text:=piece(brkrRPCBroker1.Results[0],'^',3);
             PageLength.Text:=piece(brkrRPCBroker1.Results[0],'^',4);
             BackSpace.Text:=piece(brkrRPCBroker1.Results[0],'^',5);
             OpenExecute.Text:=brkrRPCBroker1.Results[1];
             CloseExecute.Text:=brkrRPCBroker1.Results[2];
           end; {call code end}
         except
           on EBrokerError do
             ShowMessage('A problem was encountered communicating with the server.');          
         end; {try end}
       end; {displayitem end}
     end;
     
     procedure TForm1.FormDestroy(Sender: TObject);
     begin
       TermTypeList.Free;
     end;
   
   end.