在Delphi中识别计算机的子网掩码

Question

我正在寻找一种方法,能够在运行时检索我正在运行的计算机的IP子网掩码,在Delphi中.

代码中有没有办法检索子网掩码并存储它以便我可以在其他操作中使用它？

谢谢

Answer 1

您可以使用Win32_NetworkAdapterConfiguration WMI类和IPSubnet属性.

试试这个示例代码

{$APPTYPE CONSOLE}


uses
  SysUtils,
  ActiveX,
  ComObj,
  Variants;

function VarArrayToStr(const vArray: variant): string;

    function _VarToStr(const V: variant): string;
    var
    Vt: integer;
    begin
    Vt := VarType(V);
        case Vt of
          varSmallint,
          varInteger  : Result := IntToStr(integer(V));
          varSingle,
          varDouble,
          varCurrency : Result := FloatToStr(Double(V));
          varDate     : Result := VarToStr(V);
          varOleStr   : Result := WideString(V);
          varBoolean  : Result := VarToStr(V);
          varVariant  : Result := VarToStr(Variant(V));
          varByte     : Result := char(byte(V));
          varString   : Result := String(V);
          varArray    : Result := VarArrayToStr(Variant(V));
        end;
    end;

var
i : integer;
begin
    Result := '[';
     if (VarType(vArray) and VarArray)=0 then
       Result := _VarToStr(vArray)
    else
    for i := VarArrayLowBound(vArray, 1) to VarArrayHighBound(vArray, 1) do
     if i=VarArrayLowBound(vArray, 1)  then
      Result := Result+_VarToStr(vArray[i])
     else
      Result := Result+'|'+_VarToStr(vArray[i]);

    Result:=Result+']';
end;

procedure  GetWin32_NetworkAdapterConfigurationInfo;
const
  WbemUser            ='';
  WbemPassword        ='';
  WbemComputer        ='localhost';
  wbemFlagForwardOnly = $00000020;
var
  FSWbemLocator : OLEVariant;
  FWMIService   : OLEVariant;
  FWbemObjectSet: OLEVariant;
  FWbemObject   : OLEVariant;
  oEnum         : IEnumvariant;
  iValue        : LongWord;
begin;
  FSWbemLocator := CreateOleObject('WbemScripting.SWbemLocator');
  FWMIService   := FSWbemLocator.ConnectServer(WbemComputer, 'root\CIMV2', WbemUser, WbemPassword);
  FWbemObjectSet:= FWMIService.ExecQuery('SELECT * FROM Win32_NetworkAdapterConfiguration Where IpEnabled=True','WQL',wbemFlagForwardOnly);
  oEnum         := IUnknown(FWbemObjectSet._NewEnum) as IEnumVariant;
  while oEnum.Next(1, FWbemObject, iValue) = 0 do
  begin
    Writeln(Format('Caption       %s',[String(FWbemObject.Caption)]));// String
    if not VarIsNull(FWbemObject.DHCPServer) then
      Writeln(Format('DHCPServer    %s',[String(FWbemObject.DHCPServer)]));// String
    if not VarIsNull(FWbemObject.IPAddress) then
      Writeln(Format('IPAddress     %s',[VarArrayToStr(FWbemObject.IPAddress)]));// array String

    if not VarIsNull(FWbemObject.IPSubnet) then
      Writeln(Format('IPSubnet      %s',[VarArrayToStr(FWbemObject.IPSubnet)]));// array String

    if not VarIsNull(FWbemObject.MACAddress) then
      Writeln(Format('MACAddress     %s',[VarArrayToStr(FWbemObject.MACAddress)]));// array String

    Writeln;
    FWbemObject:=Unassigned;
  end;
end;


begin
 try
    CoInitialize(nil);
    try
      GetWin32_NetworkAdapterConfigurationInfo;
    finally
      CoUninitialize;
    end;
 except
    on E:EOleException do
        Writeln(Format('EOleException %s %x', [E.Message,E.ErrorCode]));
    on E:Exception do
        Writeln(E.Classname, ':', E.Message);
 end;
 Writeln('Press Enter to exit');
 Readln;
end.