If (moPrinter is null) throw new InvalidOperationException('Printer not found') ManagementObject moPrinter = moSearcher.Get().OfType().FirstOrDefault() Using (ManagementObjectSearcher moSearcher = new ManagementObjectSearcher(mScope, mQuery, mOptions)) MQuery.QueryString += string.IsNullOrEmpty(PrinterName) SelectQuery mQuery = new SelectQuery('SELECT * FROM Win32_Printer') ManagementScope mScope = new connOptions)

String machineName = string.IsNullOrEmpty(MachineName) ? Environment.MachineName : MachineName Public static uint PrintTestPage(string PrinterName, string MachineName)ĬonnectionOptions connOptions = GetConnectionOptions() ĮnumerationOptions mOptions = GetEnumerationOptions(false) Sample call to Print a test page using the default printer in the local machine: var result = PrintTestPage(null, null) The method returns 0 if successful and throws an exception if the Printer is not found. String MachineName: the name of a Machine in the Network or null to use the LocalMachine name.

String PrinterName: the name of a specific Printer or null to use the default Printer. This gives means to correct/adapt the code to specific contexts, when necessary.Īlso, the helper methods here can be reused to initialize any other WMI query.įor example, a wrong Impersonation option, will result in an exception ( 0x80070005: (E_ACCESSDENIED)) when connecting to the WMI Scope or when the WMI query is executed.Ī description of the PrintTestPage method parameters:

Now, this method might look verbose, but I think it's important, when calling WMI methods, that the Management Options and Scopes are defined correctly.

Windows 7 print test page