DisconnectVmFromSwitch(
string virtualMachineName,
string switchName)
{
ManagementScope scope = new ManagementScope(@"root\virtualization\v2");
using (ManagementObject managementService = WmiUtilities.GetVirtualMachineManagementService(scope))
//
// Find the Ethernet switch we want to disconnect from.
//
using (ManagementObject ethernetSwitch = NetworkingUtilities.FindEthernetSwitch(switchName, scope))
//
// Find the virtual machine we want to disconnect.
//
using (ManagementObject virtualMachine = WmiUtilities.GetVirtualMachine(virtualMachineName, scope))
{
//
// Find all of the connections to this switch.
//
IList <ManagementObject> connectionsToSwitch =
NetworkingUtilities.FindConnectionsToSwitch(virtualMachine, ethernetSwitch, scope);
//
// Now that we have found all of the connections to the switch we can go through and
// disable each connection so that it is not connected to anything. Note that you can also
// delete the connection object, but disabling the connection is sometimes preferable because
// it preserves all of the connection's configuration options along with any metrics
// associated with the connection.
//
try
{
foreach (ManagementObject connection in connectionsToSwitch)
{
connection["EnabledState"] = 3; // 3 means "Disabled"
using (ManagementBaseObject inParams =
managementService.GetMethodParameters("ModifyResourceSettings"))
{
inParams["ResourceSettings"] = new string[] { connection.GetText(TextFormat.WmiDtd20) };
using (ManagementBaseObject outParams =
managementService.InvokeMethod("ModifyResourceSettings", inParams, null))
{
WmiUtilities.ValidateOutput(outParams, scope);
}
}
}
}
finally
{
// Dispose of the connectionsToSwitch.
foreach (ManagementObject connection in connectionsToSwitch)
{
connection.Dispose();
}
}
}
Console.WriteLine(string.Format(CultureInfo.CurrentCulture,
"Successfully disconnected virtual machine '{0}' from switch '{1}'.",
virtualMachineName, switchName));
}
ModifyConnection(
string virtualMachineName,
string currentSwitchName,
string newSwitchName)
{
ManagementScope scope = new ManagementScope(@"root\virtualization\v2");
using (ManagementObject managementService = WmiUtilities.GetVirtualMachineManagementService(scope))
//
// Find the Ethernet switch we want to disconnect from and the one we want to connect to.
//
using (ManagementObject currentEthernetSwitch = NetworkingUtilities.FindEthernetSwitch(currentSwitchName, scope))
using (ManagementObject newEthernetSwitch = NetworkingUtilities.FindEthernetSwitch(newSwitchName, scope))
//
// Find the virtual machine we want to modify.
//
using (ManagementObject virtualMachine = WmiUtilities.GetVirtualMachine(virtualMachineName, scope))
{
//
// Find the connections to the current switch.
// Note that this method finds all connections to the switch, including those connections
// that are configured to dynamically select a switch from a switch resource pool and
// reconfigures them to always connect to the new switch. If you only want to modify
// connections that are configured with a hard-affinity to the original switch, modify the
// NetworkingUtilities.FindConnectionsToSwitch method.
//
IList <ManagementObject> currentConnections =
NetworkingUtilities.FindConnectionsToSwitch(virtualMachine, currentEthernetSwitch, scope);
//
// Set each connection to connect to the new switch. If the virtual machine is currently
// running, then it will immediately connect to the new switch. If it is not running, then
// it will connect to the switch when it is turned on.
//
try
{
foreach (ManagementObject connection in currentConnections)
{
connection["HostResource"] = new string[] { newEthernetSwitch.Path.Path };
using (ManagementBaseObject inParams =
managementService.GetMethodParameters("ModifyResourceSettings"))
{
inParams["ResourceSettings"] = new string[] { connection.GetText(TextFormat.WmiDtd20) };
using (ManagementBaseObject outParams =
managementService.InvokeMethod("ModifyResourceSettings", inParams, null))
{
WmiUtilities.ValidateOutput(outParams, scope);
}
}
}
}
finally
{
// Dispose of the connections.
foreach (ManagementObject connection in currentConnections)
{
connection.Dispose();
}
}
}
Console.WriteLine(string.Format(CultureInfo.CurrentCulture,
"Successfully modified virtual machine '{0}' so that every connection to '{1}' is now " +
"connected to '{2}'.", virtualMachineName, currentSwitchName, newSwitchName));
}