我要评论本文实例讲述了c#使用控制台列出当前所有可用打印机列表的方法。分享给大家供大家参考。具体如下：
// the initial c# code for the wmi query was generated by wmi code
//generator, version 5.00, http://www.robvanderwoude.com/wmigen.php
using system;
using system.management;
using system.collections;
namespace robvanderwoude
{
public class listprinters
{
public static int main( string[] args )
{
try
{
string computer = string.empty;
#region command line parsing
// only 1 optional argument allowed: a remote computer name
if ( args.length > 1 )
{
throw new exception( "invalid command line arguments" );
}
if ( args.length == 1 )
{
// we'll display a 'friendly' message if help was requested
if ( args[0].startswith( "/" ) || args[0].startswith( "-" ) )
{
switch ( args[0].toupper( ) )
{
case "/?":
case "-?":
case "/h":
case "-h":
case "--h":
case "/help":
case "-help":
case "--help":
return writeerror( string.empty );
default:
return writeerror( "invalid command line argument" );
}
}
else
{
computer = "\\\\" + args[0] + "\\";
}
}
#endregion
string wmins = computer + "root\\cimv2";
managementobjectsearcher searcher = new managementobjectsearcher( wmins, "select * from win32_printer" );
arraylist printers = new arraylist( );
foreach ( managementobject queryobj in searcher.get( ) )
{
printers.add( queryobj["deviceid"] );
}
printers.sort( );
foreach ( string printer in printers )
{
console.writeline( printer );
}
return 0;
}
catch ( exception e )
{
return writeerror( e );
}
}
public static int writeerror( exception e )
{
return writeerror( e == null ? null : e.message );
}
public static int writeerror( string errormessage )
{
string fullpath = environment.getcommandlineargs( ).getvalue( 0 ).tostring( );
string[] program = fullpath.split( '\\' );
string exename = program[program.getupperbound( 0 )];
exename = exename.substring( 0, exename.indexof( '.' ) );
if ( string.isnullorempty( errormessage ) == false )
{
console.error.writeline( );
console.foregroundcolor = consolecolor.red;
console.error.write( "error: " );
console.foregroundcolor = consolecolor.white;
console.error.writeline( errormessage );
console.resetcolor( );
}
console.error.writeline( );
console.error.writeline( exename + ", version 1.10" );
console.error.writeline( "list all local printers on the specified computer" );
console.error.writeline( );
console.error.write( "usage: " );
console.foregroundcolor = consolecolor.white;
console.error.write( exename.toupper( ) );
console.error.writeline( " [ computername ]" );
console.resetcolor( );
console.error.writeline( );
console.error.writeline( "where: 'computername' is the (optional) name of a remote computer" );
console.error.writeline( " (default if not specified: local computer)" );
console.error.writeline( );
console.error.writeline( "written by rob van der woude" );
return 1;
}
}
}
希望本文所述对大家的c#程序设计有所帮助。
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