Bandwidth

Question

How can i have these items in my c# project?

Vulpes · Answer

The best I can come up with to get the active internet connection is to call the API function InternetGetConnectedStateEx ( http://msdn.microsoft.com/en-us/library/windows/desktop/aa384705(v=vs.85).aspx ). However this only tells you the type of connection (LAN Modem etc) together with the connection name so if you need to correlate this with the network adapter then some more work will be needed. As far as getting all possible network adapters that could be used for internet access is concerned I think you'll have to be content with getting all the enabled adapters and unless you have some other way of filtering them disable them all. Here's some code to do all this: using System; using System.Management; using System.Runtime.InteropServices; using System.Text; [Flags] enum ConnectionStates : uint { Modem = 0x01 LAN = 0x02 Proxy = 0x04 ModemBusy = 0x08 RasInstalled = 0x10 Offline = 0x20 Configured = 0x40 } class Test { [DllImport(wininet.dll)] static extern bool InternetGetConnectedStateEx(out ConnectionStates state StringBuilder name uint nameLen uint reserved); static void Main() { StringBuilder name = new StringBuilder(80); ConnectionStates state; bool connected = InternetGetConnectedStateEx(out state name 64 0); if (!connected) { Console.WriteLine(The machine currently has no internet connection ); } else { Console.WriteLine(Connection state : {0} - Connection name : {1}
 state name); } Console.WriteLine(The enabled adapter(s) are
); SelectQuery query = new SelectQuery(Win32_NetworkAdapter NetEnabled=True); ManagementObjectSearcher search = new ManagementObjectSearcher(query); foreach(ManagementObject result in search.Get()) { string desc = result[Description].ToString(); Console.WriteLine( {0} desc); } Console.ReadKey(); } } Incidentally there is another WMI class called Win32_NetworkAdapterConfiguration ( http://msdn.microsoft.com/en-us/library/windows/desktop/aa394217(v=vs.85).aspx ) which contains some further useful information about network adapters. If there are some enabled adapters that you don't want to disable because they're never used for internet access then you might be able to identify them from that class and then relate them back to the Win32_NetworkAdapter class using the InterfaceIndex property.

Vulpes · Answer

I can't say I'd ever have been able to figure out that registry code but I'm pleased that you've come up with a satisfactory solution now :)

abc sharp · Answer

vulpes i found it i used registry like this: first of all go the below address(maybe you can't access this area): IE->tools menu->Internet options->connections tab->setting of dial-up and virtual private-> 1)check the automatically detect settings from automatic configuration part and see its address in registry: HKEY_CURRENT_USER\software\microsoft\windows\current version\internet settings\connections\ save value of Nokia E52 USB Modem (OTA) type i used below code for that: RegistryKey rk2 = Registry.CurrentUser.CreateSubKey(@software\microsoft\windows\currentversion\internet settings\connections); rk2.SetValue(Nokia E52 USB Modem (OTA) new byte[] {0x460x000x000x000xCE0x000x000x00 090x000x000x000x000x000x000x00 0x050x000x000x000x6C0x6F0x630x61 0x6C0x000x000x000x000x050x000x00 000x000x000x000x000x400xE70x1B 0x500x490xB40xCC0x010x000x000x00 0x000x000x000x000x000x000x000x00 0x000x030x000x000x000x170x000x00 0x000x000x000x000x000xFE0x800x00 0x000x000x000x000x000x340xA80x13 0x4B0xF50xFA0xE70x1B0x120x000x00 0x000xBC0x7D0x000x000xD00x7D0x00 0x000xE80x7D0x000x000xFC0x7D0x00 0x000x180x7E0x000x000x9C0x810x00 0x000x5C0x800x000x000x740x800x00 0x000x900x800x000x000x3C0x800x00 0x000x980x830x000x000x080x8E0x00 0x000x240x8E0x000x000x980x8E0x00 0x000xB80x8E0x000x000x040x8F0x00 0x000x180x8F0x000x000x340x8F0x00 0x000x4C0x8F0x000x000x640x8F0x00 0x000x800x8F0x000x000x380x8E0x00 0x000x500x8E0x000x000x980x8F0x00 0x000x680x8E0x000x000x020x000x00 0x000x0A0x050x180xE40x000x000x00 0x000x000x000x000x000x780xBB0x00 0x000xF40xDA0x000x000x080xDB0x00 0x000x1C0xDB0x000x000x600x000x00 0x000x780x000x000x000x300x7D0xF4 0x660x7C0x000x000x800x140x000x00 0x000x180x000x000x000x300x000x00 0x000x480x000x000x000x600x000x00 0x000x780x000x000x000x900x000x00 0x000xA80x000x000x000xC00x000x00 0x000xD80x000x000x000xF00x000x00 0x000x080x010x000x000x200x010x00 0x000x380x010x000x000x500x010x00 0x000x680x010x000x000x800x010x00 0x000x980x010x000x000xB00x010x00 0x000xC80x010x000x000x170x000x00 0x000x000x000x000x000x200x010x00 0x000x410x370x9E0x760x340xA80x13 0x4B0xF50xFA0xE70x1B0x000x000x00 0x000x880x020x000x000xA00x020x00 0x000xB80x020x000x000xD00x020x00 0x000xE80x020x000x000x000x030x00 0x000x180x030x000x000x300x030x00 0x000x480x030x000x000x600x030x00 0x000x780x030x000x000xBE0x620xF4 0x660x7C0x030x000x800x470x000x00 0x000xD80x030x000x000xF00x030x00 0x000x080x040x000x000x200x040x00 0x000x380x040x000x000x500x040x00 0x000x680x040x000x000x800x040x00 0x000x980x040x000x000xB00x040x00 0x000xCB0x040x000x00 }  RegistryValueKind.Binary); System.Windows.MessageBox.Show(The Internet Has Been Connected!); } 2)uncheck above item and check use a proxy server ...  from proxy part and see again the amount of that type and save it like : RegistryKey rk2 = Registry.CurrentUser.CreateSubKey(@software\microsoft\windows\currentversion\internet settings\connections); rk2.SetValue(Nokia E52 USB Modem (OTA) new byte[] {0x460x000x000x000xcc0x000x000x00 0x030x000x000x000x0c0x000x000x00 0x310x320x370x2E0x300x2E0x300x2E 0x310x3A0x320x300x050x000x000x00 0x6C0x6F0x630x610x6C0x000x000x00 0x000x010x000x000x000x000x000x00 0x000x800x1A0x770x870x430xB40xCC 0x010x000x000x000x000x000x000x00 0x000x000x000x000x000x030x000x00 0x000x170x000x000x000x000x000x00 0x000xFE0x800x000x000x000x000x00 0x000x340xA80x130x4B0xF50xFA0xE7 0x1B0x120x000x000x000xBC0x7D0x00 0x000xD00x7D0x000x000xE80x7D0x00 0x000xFC0x7D0x000x000x180x7E0x00 0x000x9C0x810x000x000x5C0x800x00 0x000x740x800x000x000x900x800x00 0x000x3C0x800x000x000x980x830x00 0x000x080x8E0x000x000x240x8E0x00 0x000x980x8E0x000x000xB80x8E0x00 0x000x040x8F0x000x000x180x8F0x00 0x000x340x8F0x000x000x4C0x8F0x00 0x000x640x8F0x000x000x800x8F0x00 0x000x380x8E0x000x000x500x8E0x00 0x000x980x8f0x000x000x680x8E0x00 0x000x020x000x000x000x0A0x050x18 0xE40x000x000x000x000x000x000x00 0x000x780xBB0x000x000xF40xDA0x00 0x000x080xDB0x000x000x1C0xDB0x00 0x000x600x000x000x000x780x000x00 0x000x300x7D0xF40x660x7C0x000x00 0x800x140x000x000x000x180x000x00 0x000x300x000x000x000x480x000x00 0x000x600x000x000x000x780x000x00 0x000x900x000x000x000xA80x000x00 0x000xC00x000x000x000xD80x000x00 0x000xF00x000x000x000x080x010x00 0x000x200x010x000x000x380x010x00 0x000x500x010x000x000x680x010x00 0x000x800x010x000x000x980x010x00 0x000xB00x010x000x000xC80x010x00 0x000x170x000x000x000x000x000x00 0x000x200x010x000x000x410x370x9E 0x760x340xA80x130x4B0xF50xFA0xE7 0x1B0x000x000x000x000x880x020x00 0x000xA00x020x000x000xB80x020x00 0x000xD00x020x000x000xE80x020x00 0x000x000x030x000x000x180x030x00 0x000x300x030x000x000x480x030x00 0x000x600x030x000x000x780x030x00 0x000xBE0x620xF40x660x7C0x030x00 0x800x470x000x000x000xD80x030x00 0x000xF00x030x000x000x080x040x00 0x000x200x040x000x000x380x040x00 0x000x500x040x000x000x680x040x00 0x000x800x040x000x000x980x040x00 0x000xB00x040x000x000xC80x040x00 } RegistryValueKind.Binary); System.Windows.MessageBox.Show(The Internet Has Been DisConnected!); } so i can put these codes in a button  when i click on the connect button i can use the internet and when i click on the disconnect button i can't access to the internet . thank you for your effort and i hope it useful.

abc sharp · Answer

It's just shows me Active adapter should have been successfully disabled but my connection is active yet and it couldn't disconnect to the internet still. please download Cyber sieve software it works for all kind of adapters with just a check box.i want just that.

Vulpes · Answer

I don't know but I've now found an API function which can be used to disable a network adapter namely SetIfEntry ( http://msdn.microsoft.com/en-us/library/aa366362(VS.85).aspx ). Check the notes on administrator status. Here's the code to disable the current adapter having first obtained its interface index via GetBestInterface: using System; using System.Runtime.InteropServices; using System.Net; [StructLayout(LayoutKind.Sequential CharSet=CharSet.Unicode)] struct MIB_IFROW { [MarshalAs(UnmanagedType.ByValTStr SizeConst = 256)] public string wszName; public uint dwIndex; public uint dwType; public uint dwMtu; public uint dwSpeed; public uint dwPhysAddrLen; [MarshalAs(UnmanagedType.ByValArray SizeConst = 8)] public byte[] bPhysAddr; public uint dwAdminStatus; public uint dwOperStatus; public uint dwLastChange; public uint dwInOctets; public uint dwInUcastPkts; public uint dwInNUcastPkts; public uint dwInDiscards; public uint dwInErrors; public uint dwInUnknownProtos; public uint dwOutOctets; public uint dwOutUcastPkts; public uint dwOutNUcastPkts; public uint dwOutDiscards; public uint dwOutErrors; public uint dwOutQLen; public uint dwDescrLen; [MarshalAs(UnmanagedType.ByValArray SizeConst = 256)] public byte[] bDescr; } class Test { const uint MIB_IF_ADMIN_STATUS_UP = 1; const uint MIB_IF_ADMIN_STATUS_DOWN = 2; [DllImport(iphlpapi.dll)] static extern uint GetBestInterface(uint DestAddr out uint BestIfIndex); [DllImport(iphlpapi CharSet=CharSet.Unicode)] static extern uint SetIfEntry(IntPtr pIfRow); static void Main() { IPAddress ipa = IPAddress.Parse(192.0.43.10); // www.example.com uint DestAddr = BitConverter.ToUInt32(ipa.GetAddressBytes() 0); uint BestIfIndex; GetBestInterface(DestAddr out BestIfIndex); uint retValue = SetAdminStatus(BestIfIndex false); // use true to re-enable if (retValue == 0) { Console.WriteLine(Active adapter should have been successfully disabled); } else { Console.WriteLine(Something went wrong!); } Console.ReadKey(); } static uint SetAdminStatus(uint ifIndex bool enable) { uint status = enable ? MIB_IF_ADMIN_STATUS_UP : MIB_IF_ADMIN_STATUS_DOWN; MIB_IFROW ifRow = new MIB_IFROW(); ifRow.dwIndex = ifIndex; ifRow.dwAdminStatus = status; IntPtr buffer = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(MIB_IFROW))); Marshal.StructureToPtr(ifRow buffer true); uint retValue = SetIfEntry(buffer); Marshal.FreeHGlobal(buffer); return retValue; } }

abc sharp · Answer

why it doesn't show my nokia connection?

Vulpes · Answer

Can't say I'm surprised :-/ It's just possible that the name (as far as netsh is concerned) is slightly different. I'd try the following command to list all registered interfaces: netsh interface show interface

abc sharp · Answer

i'm sorry . i opened up cmd.exe an typed that but it showed me An interface with this name is not registered with the router.

Vulpes · Answer

It looks like you'll have to forget about doing this using WMI as for some unknown reason it seems unable to list all the network adapters. I don't know whether you're familiar with the 'netsh' command line utility but I'd try typing this from the command line: netsh interface set interface name=Nokia E52 USB Modem (OTA) admin=DISABLED If that succeeds in disabling it then I'll try and figure out some code to call it from C#.

abc sharp · Answer

It just shows me all of adapter without index like index.rar in the previous post

Vulpes · Answer

I had hoped there would be an API function that could be used to disable the active adapter but if there is I can't find it :( That means we'll have to go back again to WMI and see if there's an adapter which has the same Description property as the active adapter even though it doesn't have the correct InterfaceIndex. To see whether there's any mileage in that I'd run this WMI code on its own and see whether it's listed: using System; using System.Management; class Test { static void Main() { Console.WriteLine(The descriptions of the adapter(s) are
); SelectQuery query = new SelectQuery(Win32_NetworkAdapter); ManagementObjectSearcher search = new ManagementObjectSearcher(query); foreach(ManagementObject result in search.Get()) { if (result[Description] != null) { string desc = result[Description].ToString(); Console.WriteLine( {0} desc); } } Console.ReadKey(); } }

abc sharp · Answer

vulpes it shows my active connetion but what's your idea for disabling?

abc sharp · Answer

it works. see my picture:

Vulpes · Answer

I'm at a loss to understand why the index returned by GetBestInterface doesn't correspond with the index of one of your adapters but I'll have one last go at trying to do it using the API function GetAdaptersInfo - forget WMI for the time being. Here's the code for that which again works fine on my machine: using System; using System.Runtime.InteropServices; using System.Net; [StructLayout(LayoutKind.Sequential CharSet=CharSet.Ansi)] public struct IP_ADAPTER_INFO { public IntPtr Next; public int ComboIndex; [MarshalAs(UnmanagedType.ByValTStr SizeConst=260)] public string AdapterName; [MarshalAs(UnmanagedType.ByValTStr SizeConst=132)] public string AdapterDescription; public uint AddressLength; [MarshalAs(UnmanagedType.ByValArray SizeConst=8)] public byte[] Address; public int Index; public uint Type; public uint DhcpEnabled; public IntPtr CurrentIpAddress; public IP_ADDR_STRING IpAddressList; public IP_ADDR_STRING GatewayList; public IP_ADDR_STRING DhcpServer; public bool HaveWins; public IP_ADDR_STRING PrimaryWinsServer; public IP_ADDR_STRING SecondaryWinsServer; public int LeaseObtained; public int LeaseExpires; } [StructLayout(LayoutKind.Sequential CharSet=CharSet.Ansi)] public struct IP_ADDR_STRING { public IntPtr Next; public IP_ADDRESS_STRING IpAddress; public IP_ADDRESS_STRING IpMask; public int Context; } [StructLayout(LayoutKind.Sequential CharSet=CharSet.Ansi)] public struct IP_ADDRESS_STRING { [MarshalAs(UnmanagedType.ByValTStr SizeConst=16)] public string Address; } class Test { const int ERROR_BUFFER_OVERFLOW = 111; [DllImport(iphlpapi.dll)] static extern uint GetBestInterface(uint DestAddr out uint BestIfIndex); [DllImport(iphlpapi.dll CharSet=CharSet.Ansi)] public static extern int GetAdaptersInfo(IntPtr pAdapterInfo ref long pBufOutLen); static void Main() { IPAddress ipa = IPAddress.Parse(192.0.43.10); // www.example.com uint DestAddr = BitConverter.ToUInt32(ipa.GetAddressBytes() 0); uint BestIfIndex; GetBestInterface(DestAddr out BestIfIndex); Console.WriteLine(The index of the active connection is {0} BestIfIndex); FindAdapter(BestIfIndex); Console.ReadKey(); } public static void FindAdapter(uint BestIfIndex) { Type t = typeof(IP_ADAPTER_INFO); long structSize = Marshal.SizeOf(t); IntPtr pArray = Marshal.AllocHGlobal(new IntPtr(structSize)); int ret = GetAdaptersInfo(pArray ref structSize); if(ret == ERROR_BUFFER_OVERFLOW ) { // Buffer was too small reallocate the correct size for the buffer pArray = Marshal.ReAllocHGlobal(pArray new IntPtr(structSize)); ret = GetAdaptersInfo(pArray ref structSize); } if(ret == 0) { IntPtr pEntry = pArray; do { IP_ADAPTER_INFO entry = (IP_ADAPTER_INFO)Marshal.PtrToStructure(pEntry t); if(entry.Index == (uint)BestIfIndex) { Console.WriteLine(The corresponding adapter is : {0} entry.AdapterDescription); break; } pEntry = entry.Next; } while( pEntry != IntPtr.Zero ); Marshal.FreeHGlobal(pArray); } else { Marshal.FreeHGlobal(pArray); throw new InvalidOperationException(GetAdaptersInfo failed:  + ret); } } } Regarding your own suggestion I imagine you must be talking about the Tools menu of Internet Explorer but unfortunately the Settings button is disabled on mine and so I couldn't get into it to see exactly what you're talking about. However trying to do anything like that programatically would be extremely difficult.

abc sharp · Answer

It's the result: I have an another idea .go to Tools menu-Internet Options-Connection tab-Dial up and virtual private and network settings section -settings- 1)uncheck the item of Automatically... and 2)checked use a proxy server section and use a address and a port.if we find this in registry we can do it another way. What's your opinion?

Vulpes · Answer

I don't know why the 'GetBestInterface' code isn't working on your machine (it works fine on my Windows 7 machine) but try this modified version which should enable you to see whether or not there's a match between the index of the active connection and the indices of all the adapters returned by WMI: using System; using System.Runtime.InteropServices; using System.Net; using System.Management; class Test { [DllImport(iphlpapi.dll)] static extern uint GetBestInterface(uint DestAddr out uint BestIfIndex); static void Main() { IPAddress ipa = IPAddress.Parse(192.0.43.10); // www.example.com uint DestAddr = BitConverter.ToUInt32(ipa.GetAddressBytes() 0); uint BestIfIndex; GetBestInterface(DestAddr out BestIfIndex); Console.WriteLine(The index of the active connection is {0} BestIfIndex); SelectQuery query = new SelectQuery(Win32_NetworkAdapter); ManagementObjectSearcher search = new ManagementObjectSearcher(query); Console.WriteLine(
The adapters together with their indices are
); string desc = null; int index = -1; foreach(ManagementObject result in search.Get()) { if (result[Description] != null) { desc = result[Description].ToString(); } else { desc = (No description); } if (result[InterfaceIndex] != null) { index = (int)(uint)result[InterfaceIndex]; } else { index = -1; } Console.WriteLine({02} : {1} index desc); } Console.ReadKey(); } } The code in your last post is just another variation of the WMI code to get all network adapters and to disable the one with a particular name. There's no way that the code on its own can tell you what the active connection is.

abc sharp · Answer

vulpes i found this : using System; using System.Collections.Generic; using System.Management; namespace NetworkAdapterInfo { class Program { static void Main(string[] args) { // Query the WMI for class Win32_NetworkAdapter // using (ManagementObjectSearcher searcher = new ManagementObjectSearcher(@select * from Win32_NetworkAdapter)) { // Get the result set // ManagementObjectCollection results = searcher.Get(); // Disable all network adapters :-O // foreach (ManagementObject obj in results) { System.Console.WriteLine(Found adapter {0} : obj[name]); if (obj[name].ToString() == Your connection name) { System.Console.WriteLine(Disabling adapter ...); obj.InvokeMethod(Disable null); System.Console.WriteLine(Done.); } } Console.ReadLine(); } } } } this give me all of my adapters but i don't know which one is active connection? when i use one adapter for check it shows me an error on this line : obj.InvokeMethod(Disable null); Do you have an idea?

abc sharp · Answer

No doesn't show anything even i've changed with another ip address(74.125.230.81). in fact doesn't run foreach(sarch variable is empty).what's the problem?

Vulpes · Answer

The GetBestInterface code won't show anything on its own as it feeds the result (contained in BestIfIndex) straight into the WMI query. So have you run that part as well? With reference to the earlier code were you in fact expecting the 'active' connection to be Nokia E52 USB Modem (0TA)?

abc sharp · Answer

it (InternetGetConnectedStateEx) shows this in the picture but your new code(GetBestInterface) didn't show anything.

Vulpes · Answer

As the previous approach (using InternetGetConnectedStateEx) was a bit 'hit or miss' I've come up with a much better way of identifying the network adapter responsible for the 'active' internet connection. This time I'm using the API function GetBestInterface ( http://msdn.microsoft.com/en-us/library/windows/desktop/aa365920(v=vs.85).aspx ) which retrieves the index of the adapter that has the best route to some IPv4 address - I've used the IP address for example.com (maintained for testing purposes by iana.org). Having obtained the index (which is unique for each adapter) all we then need to do is to query it against the InterfaceIndex property of the Win32_NetworkAdapter class to determine the adapter we need. Here's the code which is working fine on my machine. As before I'm just identifying the adapter not disabling it at this stage: using System; using System.Runtime.InteropServices; using System.Net; using System.Management; class Test { [DllImport(iphlpapi.dll)] static extern uint GetBestInterface(uint DestAddr out uint BestIfIndex); static void Main() { IPAddress ipa = IPAddress.Parse(192.0.43.10); // www.example.com uint DestAddr = BitConverter.ToUInt32(ipa.GetAddressBytes() 0); uint BestIfIndex; GetBestInterface(DestAddr out BestIfIndex); SelectQuery query = new SelectQuery(Win32_NetworkAdapter String.Format(InterfaceIndex={0} BestIfIndex)); ManagementObjectSearcher search = new ManagementObjectSearcher(query); foreach(ManagementObject result in search.Get()) { string desc = result[Description].ToString(); Console.WriteLine(The current 'active' adapter is : {0}  desc); } Console.ReadKey(); } }

Vulpes · Answer

Using the code I gave you earlier to obtain the active connection (using InternetGetConnectedStateEx) what is the connection state and name returned by the function?

abc sharp · Answer

I used this code for showing all of my connections but doesn't have my active connection.?see my picture. SelectQuery query = new SelectQuery(Win32_NetworkAdapter); ManagementObjectSearcher search = new ManagementObjectSearcher(query); string text = The following adapter types are present; foreach (ManagementObject result in search.Get()) { NetworkAdapter adapter = new NetworkAdapter(result); text += adapter.AdapterType + 
; } MessageBox.Show(text); some adapter at the first also is empty (why).and my active connection is usb modem(mobile).

Vulpes · Answer

I wasn't trying to disable anything in my previous post - all I was trying to do was to isolate the 'active' connection and any other network adapter that could conceivably be used for internet access. If you're happy that you can identify all the adapters that need to be disabled from that then you can just call the Disable() method on them from the code you had to start with.

abc sharp · Answer

vulpes it shows my active onnection and doesn't disconnect it. you mean can not disconnect the active connection ?if would be true all of my effort is vain.

abc sharp · Answer

I wanted to create a program to show information of bandwith and also limite the internet . my program show all of information such as sent data and received data and i want when i define an especial amount for example 10 Mb for a day when sum of sent data and received to be 10Mb disconnect automatically the internet (i used for this  WMI class). but i have a problem i want get all connections that i have and disable all of them if not just get one active connection that has connected me to the internet. see my picture . How can i do that?? Can you help me?? excuse me when i upload image with upload imege to site i can't see my picture.

Mahesh Chand · Answer

Looks like Vulpes understand zibrish language. I had no idea what abc wanted. abc - Can you describe your questions in more details? Also can you change your name to your real name. Also this post could be a good Article or blog.

abc sharp · Answer

it worked and show me some connections thank you. And my last question: which one is my active connection and how can i disable the internet?

Vulpes · Answer

OK that's telling us that there are currently no network adapters connected to the network (NetConnectionStatus = 2). I'd do the same thing again but this time for all connection statuses to see whether anything shows up then. The code will be the same as before except the first line will be: SelectQuery query = new SelectQuery(Win32_NetworkAdapter); // only one argument now

abc sharp · Answer

I wrote this cod : SelectQuery query = new SelectQuery(Win32_NetworkAdapter NetConnectionStatus=2); ManagementObjectSearcher search = new ManagementObjectSearcher(query); string text = The following adapter types are present

; foreach(ManagementObject result in search.Get()) { NetworkAdapter adapter = new NetworkAdapter(result); text += adapter.AdapterType + 
; } MessageBox.Show(text); but did't show anything see my picture. I think write anoher amount for NetConnectionStatus=2 i don't know exactly??

Vulpes · Answer

Here is the WMI documentation for the Win32_NetworkAdapter class which lists the various types of adapters supported: http://msdn.microsoft.com/en-us/library/windows/desktop/aa394216(v=vs.85).aspx I'd imagine that wireless would be the one that you'd want. However you could get a list of all adapter types using this code: SelectQuery query = new SelectQuery(Win32_NetworkAdapter NetConnectionStatus=2); ManagementObjectSearcher search = new ManagementObjectSearcher(query); string text = The following adapter types are present

; foreach(ManagementObject result in search.Get()) { NetworkAdapter adapter = new NetworkAdapter(result); text += adapter.AdapterType + 
; } MessageBox.Show(text); Incidentally the Disable method only works on Vista Windows 7 and Windows Server 2008 so I assume you have one of those.

abc sharp · Answer

vulpes could you help me ?it makes me tired.

abc sharp · Answer

I wrote using ROOT.CIMV2.Win32; at th top of form1.cs and it worked. but when i run my program it doesn't disable actually quary variable is empty.so i have two problems else: 1) why identifier adapter to be empty?(don't have any connections) 2) how can i disable my usb adapter?(i use usb mobile connection) I changed place code to form1.cs but didn't work again.

Vulpes · Answer

I'd imagine that networkadapter.cs contains the code for the NetworkAdapter class. However you look to me to be putting the button1_Click handler inside networkadapter.cs which could produce a stack overflow when you try to create a new NetworkAdapter object. This method should instead be placed in Form1.cs and should be added in the normal way i.e. double click button1 in the VS designer and then paste the code into the skeleton handler. If you do that then the event will automatically be wired up for you.

abc sharp · Answer

my problem is:

Vulpes · Answer

Sorry I don't understand what the problem is. I gather that you've added networkadapter.cs to your project. You also need to add a reference to System.Management.dll to your project so that you can use the WMI classes. So assuming you've done all this are you saying that it's not working?

abc sharp · Answer

I want to make limitation. when sum of sent data and received data became 5MB the internete disconnect automatically. I found this : http://blog.opennetcf.com/ncowburn/2008/06/24/HOWTODisableEnableNetworkConnectionsProgrammaticallyUnderVista.aspx and i downloded sdk from: http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=15354 and i created NetworkAdapter.cs and added to my project but i can't add this file to System.Management.dll because i can't use NetworkAdapter.cs .what can i do?

Vulpes · Answer

Sure I'll try. What aspect is giving you difficulty?

abc sharp · Answer

Can you help me to do this?

Vulpes · Answer

Check out this article: http://www.m0interactive.com/archives/2008/02/06/how_to_calculate_network_bandwidth_speed_in_c_/