给你一个使用例子: var CommForm: TCommForm; ss :string; savef,readf :file of char; i,j :longint;procedure TCommForm.FormCreate(Sender: TObject); begin mscomm.commport:=1; mscomm.settings:='9600,n,8,1'; mscomm.inputlen:=1; mscomm.inbuffercount:=0; mscomm.portopen:=true; ss:=''; i:=0; j:=0; assignfile(savef,'save1'); rewrite(savef); assignfile(readf,'read1'); reset(readf); end;procedure TCommForm.btnConfirmClick(Sender: TObject); begin if mscomm.portopen then mscomm.portopen:=false; mscomm.commport:=strtoint(edtCommport.text); mscomm.settings:=edtCommsetting.Text; end;procedure TCommForm.MSCommComm(Sender: TObject); var filenrc :char; buffer :variant; s1:string; c :char; begin case mscomm.commEvent of comEvSend: begin while not(eof(readf)) do begin read(readf,filenrc); mscomm.output:=filenrc; j:=j+1; lblDisplay.caption:=inttostr(j); if mscomm.outbuffercount>=2 then break; end; end; comEvReceive: begin buffer:=mscomm.Input; s1:=buffer; c:=s1[1]; ss:=ss+c; i:=i+1; lblDisplay.caption:=c+inttostr(i); write(savef,c); if (c=chr(10))or(c=chr(13)) then begin lblDisplay.caption:='cr'+inttostr(i); memDisplay.lines.add(ss); ss:=''; end; end; end; end;
var
CommForm: TCommForm;
ss :string;
savef,readf :file of char;
i,j :longint;procedure TCommForm.FormCreate(Sender: TObject);
begin
mscomm.commport:=1;
mscomm.settings:='9600,n,8,1';
mscomm.inputlen:=1;
mscomm.inbuffercount:=0;
mscomm.portopen:=true;
ss:='';
i:=0;
j:=0;
assignfile(savef,'save1');
rewrite(savef);
assignfile(readf,'read1');
reset(readf);
end;procedure TCommForm.btnConfirmClick(Sender: TObject);
begin
if mscomm.portopen then
mscomm.portopen:=false;
mscomm.commport:=strtoint(edtCommport.text);
mscomm.settings:=edtCommsetting.Text;
end;procedure TCommForm.MSCommComm(Sender: TObject);
var
filenrc :char;
buffer :variant;
s1:string;
c :char;
begin
case mscomm.commEvent of
comEvSend:
begin
while not(eof(readf)) do
begin
read(readf,filenrc);
mscomm.output:=filenrc;
j:=j+1;
lblDisplay.caption:=inttostr(j);
if mscomm.outbuffercount>=2 then
break;
end;
end;
comEvReceive:
begin
buffer:=mscomm.Input;
s1:=buffer;
c:=s1[1];
ss:=ss+c;
i:=i+1;
lblDisplay.caption:=c+inttostr(i);
write(savef,c);
if (c=chr(10))or(c=chr(13)) then
begin
lblDisplay.caption:='cr'+inttostr(i);
memDisplay.lines.add(ss);
ss:='';
end;
end;
end;
end;