c# - How to print a test page and capture the return value for a non default printer on a remote server using WMI's PrintTestPage method? -

i'm using system.management namespace along wmi install printers/ports on remote server. once printer/port installed, i'd print test page, capture whether or not printing test page (theoretically) successful, , display result user. i've got working until point of printing test page.

i've seen this article, this article, on subject, neither 1 quite seems doing trick because i'm not seeing how apply them current printer i've installed.

anyway, here's code i'm working install printer (the port code similar , not necessary...there's additional code i'm using log in remote server, long know i'm creating managementscope object connectionoptions object attached, there's no reason show code either):

foreach (printers p in lstprinters) {     search = printerquery + "'" + p.printername + "'";      query = new selectquery(search);      try     {         using (var searcher = new managementobjectsearcher(scope, query))         {             managementobjectcollection printers = searcher.get();              objectgetoptions oprinteroptions =                 new objectgetoptions(null, timespan.maxvalue, true);             managementpath mpathprinter =                 new managementpath("win32_printer");             managementclass mclassprinter =                 new managementclass(scope, mpathprinter, oprinteroptions);             managementobject mnewprinter = mclassprinter.createinstance();              mnewprinter["comment"] = p.comment;             mnewprinter["deviceid"] = p.deviceid;             mnewprinter["drivername"] = p.drivername;             mnewprinter["location"] = p.location;             mnewprinter["network"] = p.network;             mnewprinter["portname"] = p.portname;             mnewprinter["shared"] = p.shared;             mnewprinter["sharename"] = p.sharename;              // if no ports returned, add port.             // otherwise, update current port object.             putoptions poputprinter = new putoptions();             poputprinter.type = puttype.updateorcreate;             poputprinter.useamendedqualifiers = true;             mnewprinter.put(poputprinter);         }     } } 

i thought able this...which similar example in second article link listed above:

managementbaseobject retvalue = mnewprinter.invokemethod("printtestpage", null);  if (convert.toint32(retvalue["returnvalue"]) == 0) {     messagebox.show("test page printed successfully."); } 

in theory, @ least in head, above ensure that, assigning mnewprinter managementobject variable invokemethod, printtestmethod linked printer on specific server.

thanks...

i think solved own question using following:

managementbaseobject outparams =     mnewprinter.invokemethod("printtestpage", null, null);  if (convert.toint32(outparams["returnvalue"]) == 0) {     messagebox.show("test page printed successfully."); } 

for reason, had add null mnewprinter.invokemethod("printtestpage, null). otherwise, returning error.