我写了个函数给你: function IPVertify(sIP: String): Boolean; Var iCount,iPos:Word; sTmp:String; begin Result:=True; sIp:=Trim(sIP);
For iCount:=1 To 3 Do Begin iPos:=Pos('.',sIP); IF iPos=0 Then Begin Result:=False; Break; End;
sTmp:=Copy(sIP,1,iPos-1); Try IF StrToInt(sTmp)>225 Then Begin Result:=False; Break; End; Except Result:=False; Break; End;
Delete(sIp,1,iPos-1); IF Copy(sIp,1,1)<>'.' Then Begin Result:=False; Break; end; Delete(sIP,1,1); End; If Result Then Try IF StrToInt(sIP)>225 Then Begin Result:=False; Exit; End; Except Result:=False; End; end;
看看我常用的 function IsLegalIP(IP:string):boolean; var i,j,l:integer; ips:array [1..4] of string; begin i:=1; for l:=1 to 4 do ips[l]:=''; for j:=1 to length(ip) do if ip[j]<>'.' then begin if (ip[j]<'0')or(ip[j]>'9') then begin Result:=false; exit; end; ips[i]:=ips[i]+ip[j] end else inc(i); if (i<>4) or((strtoint(ips[1])>255)or(strtoint(ips[1])<0)) or((strtoint(ips[2])>255)or(strtoint(ips[2])<0)) or((strtoint(ips[3])>255)or(strtoint(ips[3])<0)) or((strtoint(ips[4])>255)or(strtoint(ips[4])<0)) then Result:= false else Result:= true;end;
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function IPVertify(sIP: String): Boolean;
Var
iCount,iPos:Word;
sTmp:String;
begin
Result:=True;
sIp:=Trim(sIP);
For iCount:=1 To 3 Do
Begin
iPos:=Pos('.',sIP);
IF iPos=0 Then
Begin
Result:=False;
Break;
End;
sTmp:=Copy(sIP,1,iPos-1);
Try
IF StrToInt(sTmp)>225 Then
Begin
Result:=False;
Break;
End;
Except
Result:=False;
Break;
End;
Delete(sIp,1,iPos-1);
IF Copy(sIp,1,1)<>'.' Then
Begin
Result:=False;
Break;
end;
Delete(sIP,1,1);
End; If Result Then
Try
IF StrToInt(sIP)>225 Then
Begin
Result:=False;
Exit;
End;
Except
Result:=False;
End;
end;
function IsLegalIP(IP:string):boolean;
var i,j,l:integer; ips:array [1..4] of string;
begin i:=1;
for l:=1 to 4 do ips[l]:='';
for j:=1 to length(ip) do
if ip[j]<>'.' then
begin
if (ip[j]<'0')or(ip[j]>'9') then
begin
Result:=false;
exit;
end;
ips[i]:=ips[i]+ip[j]
end
else inc(i); if (i<>4)
or((strtoint(ips[1])>255)or(strtoint(ips[1])<0))
or((strtoint(ips[2])>255)or(strtoint(ips[2])<0))
or((strtoint(ips[3])>255)or(strtoint(ips[3])<0))
or((strtoint(ips[4])>255)or(strtoint(ips[4])<0))
then Result:= false else Result:= true;end;