c# - Passing parameters to Windows Service during installation -

i creating windows service suppose data in specific table , process record based status.

i want pass db credentials while install service using installutill parameters , save them inside registry. have tried doing using code bellow, keep getting error on event "onbeforeinstall".

i believe either passing parameters incorrectly or writing code in wrong event. need figure doing wrong.

protected override void onbeforeinstall(idictionary savedstate) {     base.onbeforeinstall(savedstate);     _eventlog.writeentry("onbeforeinstall started");     try     {         registrykey key = registry.currentuser.createsubkey(@"software\ryterms");         if (key != null)         {             _eventlog.writeentry("write data registry key");             key.setvalue("dbtype", this.context.parameters["dbtype"].tostring()); // throws error, assuming above event entry visible.             key.setvalue("datasource", this.context.parameters["datasource"].tostring());             key.setvalue("userid", this.context.parameters["userid"].tostring());             key.setvalue("password", this.context.parameters["password"].tostring());             key.setvalue("dbname", this.context.parameters["dbname"].tostring());             key.close();         }     }     catch (exception ex)     {         _eventlog.writeentry(ex.message);     }     _eventlog.writeentry("onbeforeinstall finished"); } 

i writing on command prompt: installutil rmsbgservice.exe /dbtype=sqlserver /datasource=hitin-lt /dbname=rms /userid=admin /password=passw0rd

error: "object reference not set instance of object."

p.s. dont know how debug win service, using event log record every thing.

managed on own, suppose it.

protected override void onbeforeinstall(idictionary savedstate) {     _eventlog.writeentry("onbeforeinstall started");     try     {         registrykey key = microsoft.win32.registry.localmachine.createsubkey(@"software\rms");         if (key != null)         {             _eventlog.writeentry("write data registry key");              process _prc = new process();             _prc.startinfo.filename = "cmd.exe";             _prc.startinfo.useshellexecute = false;             _prc.startinfo.redirectstandardoutput = true;             _prc.startinfo.redirectstandardinput = true;             _prc.start();              consolecolor _color = console.foregroundcolor;             console.foregroundcolor = consolecolor.darkgreen;             console.writeline("\n\n");             console.writeline("please enter following details complete setup");             console.writeline("note: if enter wrong information, need reinstall application.");             console.writeline("\n\n");             console.writeline("enter dbtype (sqlserver or oracle):");             key.setvalue("dbtype", stringcipher.encrypt(console.readline(), "@xx"));             console.writeline("enter datasource (server name):");             key.setvalue("datasource", stringcipher.encrypt(console.readline(), "@xx"));             console.writeline("enter database user id:");             key.setvalue("userid", stringcipher.encrypt(console.readline(), "@xx"));             console.writeline("enter password:");             key.setvalue("password", stringcipher.encrypt(console.readline(), "@xx"));             console.writeline("enter database name:");             key.setvalue("dbname", stringcipher.encrypt(console.readline(), "@xx"));             key.close();             console.foregroundcolor = _color;             _prc.close();         }     }     catch (exception ex)     {         _eventlog.writeentry(ex.message);     }     _eventlog.writeentry("onbeforeinstall finished");     base.onbeforeinstall(savedstate); } 

stringcipher custom function used encrypt/decrypt text. later on start, reading these stored values registry, , decrypt them pass onto database connection code , needful.

hope someone.

note

you must install service using "installutil", if choose install using setup project, installation stuck cmd window open.