public void SetServiceDescription(string serviceName, string description)
{
IntPtr service = IntPtr.Zero;
try
{
ServiceWin32Api.SERVICE_DESCRIPTION desc = new ServiceWin32Api.SERVICE_DESCRIPTION
{
lpDescription = description
};
// Open the service
service = OpenService(serviceName, ServiceWin32Api.ServiceAccessRights.SERVICE_CHANGE_CONFIG);
bool ok = ServiceWin32Api.ChangeServiceConfig2(
service,
(int)ServiceWin32Api.ServiceConfig2InfoLevel.SERVICE_CONFIG_DESCRIPTION,
ref desc);
// Check that the change occurred
if (!ok)
{
throw new Win32Exception(Marshal.GetLastWin32Error(), "Unable to change the Service configuration.");
}
}
finally
{
if (service != IntPtr.Zero)
{
ServiceWin32Api.CloseServiceHandle(service);
}
}
}
public ServiceUtilWin32Helper(string machineName)
{
// Open the service control manager
_scManager = ServiceWin32Api.OpenSCManager(
machineName,
null,
ServiceWin32Api.ServiceControlAccessRights.SC_MANAGER_CONNECT);
// Verify if the SC is opened
if (_scManager == IntPtr.Zero)
{
throw new Win32Exception(Marshal.GetLastWin32Error(), "Unable to open Service Control Manager.");
}
}
public string GetServiceDescription(string serviceName)
{
const int bufferSize = 1024 * 8;
IntPtr service = IntPtr.Zero;
IntPtr bufferPtr = IntPtr.Zero;
try
{
// Open the service
service = OpenService(serviceName, ServiceWin32Api.ServiceAccessRights.SERVICE_QUERY_CONFIG);
int dwBytesNeeded = 0;
// Allocate memory for struct
bufferPtr = Marshal.AllocHGlobal(bufferSize);
int queryResult = ServiceWin32Api.QueryServiceConfig2(
service,
ServiceWin32Api.ServiceConfig2InfoLevel.SERVICE_CONFIG_DESCRIPTION,
bufferPtr,
bufferSize,
out dwBytesNeeded);
if (queryResult == 0)
{
throw new Win32Exception(Marshal.GetLastWin32Error(), "Unable to query the Service configuration.");
}
// Cast the buffer to a SERVICE_DESCRIPTION struct
ServiceWin32Api.SERVICE_DESCRIPTION desc =
(ServiceWin32Api.SERVICE_DESCRIPTION)Marshal.PtrToStructure(bufferPtr, typeof(ServiceWin32Api.SERVICE_DESCRIPTION));
return(desc.lpDescription);
}
finally
{
// Clean up
if (bufferPtr != IntPtr.Zero)
{
Marshal.FreeHGlobal(bufferPtr);
}
if (service != IntPtr.Zero)
{
ServiceWin32Api.CloseServiceHandle(service);
}
}
}
/// <summary>
/// Calls the Win32 OpenService function and performs error checking.
/// </summary>
/// <exception cref="ComponentModel.Win32Exception">"Unable to open the requested Service."</exception>
private IntPtr OpenService(string serviceName, ServiceWin32Api.ServiceAccessRights desiredAccess)
{
// Open the service
IntPtr service = ServiceWin32Api.OpenService(
_scManager,
serviceName,
desiredAccess);
// Verify if the service is opened
if (service == IntPtr.Zero)
{
throw new Win32Exception(Marshal.GetLastWin32Error(), "Unable to open the requested Service.");
}
return(service);
}
/// <summary>
/// Implements the Dispose(bool) pattern outlined by MSDN and enforced by FxCop.
/// </summary>
private void Dispose(bool disposing)
{
if (!this.disposed)
{
if (disposing)
{
// Dispose managed resources here
}
// Unmanaged resources always need disposing
if (_scManager != IntPtr.Zero)
{
ServiceWin32Api.CloseServiceHandle(_scManager);
_scManager = IntPtr.Zero;
}
}
disposed = true;
}
