Introduction
Chameleon is an application that allows users to easily change network configuration on each network adapter from the taskbar. Chameleon offers the benefit of changing network settings according to the user's location such as home or office.
Background
The main idea of this application is changing network settings via WMI, I access WMI by using System.Management namespace. I have two objects named Connection and Profile. Connection is an object which is responsible for storing network connection information. Profile is an object which is responsible for storing profile(home, office etc.) settings such as IP, DNS, gateway etc.
The solution contains four projects. These projects are GUI, BusinessObjects, ControlLib and Helper. And there is also a setup project.
The sample application is running on the taskbar and users can change connection settings after right clicking by selecting connection and profile.
Using the code
There is a method which returns the list of available connections. This list is filled from the VMI provider.
public List<Connection> GetConnections()
{
List<Connection> insListConnection = new List<Connection>();
ManagementObjectSearcher m = new ManagementObjectSearcher();
m.Query = new ObjectQuery
("Select * from Win32_NetworkAdapterConfiguration
Where IPEnabled = True");
foreach (ManagementObject mo in m.Get())
{
Connection c = new Connection();
c.ConnectionId = mo["Index"].ToString();
c.ConnectionName = mo["Caption"].ToString().Substring
(mo["Caption"].ToString().IndexOf("]") + 1).Trim();
insListConnection.Add(c);
}
return insListConnection;
}
After creating an instance and filling the connection and profile object by passing these objects as parameter to the method named SetConnectionProfile, you can change the settings on the selected network adapter.
public void SetConnectionProfile(Connection c, Profile p)
{
ManagementObjectSearcher m = new ManagementObjectSearcher();
m.Query = new ObjectQuery("Select *
from Win32_NetworkAdapterConfiguration Where IPEnabled = True");
foreach (ManagementObject mo in m.Get())
{
if (mo["Index"].ToString()==c.ConnectionId)
{
mo.InvokeMethod("EnableStatic", new object[] {new string[]
{ p.IpAddress }, new string[] { p.SubnetMask } });
mo.InvokeMethod("SetGateways", new object[] {new string[]
{ p.DefaultGateway }, new string[] { "1" } });
mo.InvokeMethod("SetDNSServerSearchOrder", new object[]
{new string[] { p.PreferredDns} });
if (p.ProxyEnabled)
{
RegistryManager.EnableProxy = true;
RegistryManager.BypassProxyForLocalAddresses =
p.ByPassProxyForLocal;
RegistryManager.ProxyAddress= p.ProxyAddress + ":" +
p.ProxyPort;
}
else
{
RegistryManager.EnableProxy = false;
RegistryManager.ProxyAddress = "";
RegistryManager.BypassProxyForLocalAddresses =true;
}
}
}
}
And there is another method named SetConnectionAutomatic that resets the connection settings.
public void SetConnectionAutomatic(Connection c)
{
ManagementObjectSearcher m =new ManagementObjectSearcher();
m.Query = new ObjectQuery("Select * from Win32_NetworkAdapterConfiguration
Where IPEnabled = True");
foreach (ManagementObject mo in m.Get())
{
if (mo["Index"].ToString() == c.ConnectionId)
{
mo.InvokeMethod("EnableDHCP",null);
mo.InvokeMethod("SetDNSServerSearchOrder",null);
RegistryManager.EnableProxy = false;
RegistryManager.ProxyAddress = "";
RegistryManager.BypassProxyForLocalAddresses = true;
}
}
}
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