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我有一个使用TNetsharingmanager工具启用和禁用通过NIC卡通信的delphi porgram。它在Windows XP和7上运行得非常完美,但不会在Windows 8和10上运行。当我的程序在启动时尝试连接第一个可用NIC卡时,它不断提高“拒绝访问”错误。我似乎无法弄清楚这一点。我想也许是因为当前用户没有权限进行连接,但事实并非如此。我甚至以管理员身份运行我的程序,但仍然引发错误。一旦你确定错误框,我的程序继续没有问题。TNetSharingManager和Windows 8&10:拒绝访问
这里是我使用的代码:
procedure TDXCommdlg.GetConnectionList(Strings,IdList: TStrings);
var
pEnum: IEnumVariant;
vNetCon: OleVARIANT;
dwRetrieved: Cardinal;
pUser: NETCONLib_TLB.PUserType1;
NetCon : INetConnection;
begin
Strings.Clear;
IdList.Clear;
pEnum := (NetSharingManager1.EnumEveryConnection._NewEnum as IEnumVariant);
while (pEnum.Next(1, vNetCon, dwRetrieved) = S_OK) do
begin
(IUnknown(vNetCon) as INetConnection).GetProperties(pUser);
NetCon := (IUnknown(vNetCon) as INetConnection);
if (pUser.Status in [NCS_CONNECTED,NCS_CONNECTING])
and (pUser.MediaType in [NCM_LAN,NCM_SHAREDACCESSHOST_LAN,NCM_ISDN])
and (GetMacAddress(GuidToString(pUser.guidId))<>'') then
begin
//we only want valid network cards that are enabled
Strings.Add(pUser.pszwName);
IdList.Add(GuidToString(pUser.guidId));
end;
end;
end;
function TDXCommdlg.GetMacAddress(CardID: string): String;
var
Reg: TRegistry;
KeyValues: TSTringList;
i: integer;
CardInstanceID,CardAddress: string;
begin
Result := '';
Reg := TRegistry.Create;
KeyValues := TStringList.Create;
try
Reg.RootKey:=HKEY_LOCAL_MACHINE;
if Reg.OpenKey(MacLocation,false) then
begin
Reg.GetKeyNames(KeyValues);
Reg.CloseKey;
for i := 0 to KeyValues.Count-1 do
if reg.OpenKey(MacLocation+'\'+KeyValues[i],false) then
begin
CardInstanceID := Reg.ReadString('NetCfgInstanceId');
CardAddress := Reg.ReadString('NetworkAddress');
Reg.CloseKey;
if CardInstanceID = CardId then
begin
if CardAddress='' then CardAddress := 'Hardware';
Result := CardAddress;
break;
end;
end;
end;
finally
Reg.Free;
KeyValues.Free;
end;
end;
procedure TDXCommdlg.ResetNIC(const aConnection: string);
var
pEnum: IEnumVariant;
vNetCon: OleVARIANT;
dwRetrieved: Cardinal;
pUser: NETCONLib_TLB.PUserType1;
begin
enabled := false;
try
pEnum := (NetSharingManager1.EnumEveryConnection._NewEnum as IEnumVariant);
while (pEnum.Next(1, vNetCon, dwRetrieved) = S_OK) do
begin
(IUnknown(vNetCon) as INetConnection).GetProperties(pUser);
if pUser.pszwName = aConnection then
begin
(IUnknown(vNetCon) as INetConnection).Disconnect;
(IUnknown(vNetCon) as INetConnection).Connect;
sleep(2000);
break;
end;
end;
finally
enabled := true;
end;
end;