WMI to reboot remote machine
To address WMI queries to a remote computer, you simply specify that computer's name (or IP address) in the ManagementScope
object.
I'm not well up in C#, but here's an example I came up with using MSDN and WMI Code Creator (which is, by the way, an excellent tool for generating WMI code, and supports C# among others). Hope this code will give you the idea.
(Disclaimer: This code is untested.)
using System;
using System.Management;
...
void Shutdown()
{
try
{
const string computerName = "COMPUTER"; // computer name or IP address
ConnectionOptions options = new ConnectionOptions();
options.EnablePrivileges = true;
// To connect to the remote computer using a different account, specify these values:
// options.Username = "USERNAME";
// options.Password = "PASSWORD";
// options.Authority = "ntlmdomain:DOMAIN";
ManagementScope scope = new ManagementScope(
"\\\\" + computerName + "\\root\\CIMV2", options);
scope.Connect();
SelectQuery query = new SelectQuery("Win32_OperatingSystem");
ManagementObjectSearcher searcher =
new ManagementObjectSearcher(scope, query);
foreach (ManagementObject os in searcher.Get())
{
// Obtain in-parameters for the method
ManagementBaseObject inParams =
os.GetMethodParameters("Win32Shutdown");
// Add the input parameters.
inParams["Flags"] = 2;
// Execute the method and obtain the return values.
ManagementBaseObject outParams =
os.InvokeMethod("Win32Shutdown", inParams, null);
}
}
catch(ManagementException err)
{
MessageBox.Show("An error occurred while trying to execute the WMI method: " + err.Message);
}
catch(System.UnauthorizedAccessException unauthorizedErr)
{
MessageBox.Show("Connection error (user name or password might be incorrect): " + unauthorizedErr.Message);
}
}
I had trouble with this also. WMI can be misleading with methods for classes and object. My solution is for rebooting a host on the network with C# and WMI, but is easily simplified for local machine:
private void rebootHost(string hostName)
{
string adsiPath = string.Format(@"\\{0}\root\cimv2", hostName);
ManagementScope scope = new ManagementScope(adsiPath);
// I've seen this, but I found not necessary:
// scope.Options.EnablePrivileges = true;
ManagementPath osPath = new ManagementPath("Win32_OperatingSystem");
ManagementClass os = new ManagementClass(scope, osPath, null);
ManagementObjectCollection instances;
try
{
instances = os.GetInstances();
}
catch (UnauthorizedAccessException exception)
{
throw new MyException("Not permitted to reboot the host: " + hostName, exception);
}
catch (COMException exception)
{
if (exception.ErrorCode == -2147023174)
{
throw new MyException("Could not reach the target host: " + hostName, exception);
}
throw; // Unhandled
}
foreach (ManagementObject instance in instances)
{
object result = instance.InvokeMethod("Reboot", new object[] { });
uint returnValue = (uint)result;
if (returnValue != 0)
{
throw new MyException("Failed to reboot host: " + hostName);
}
}
}