我正在尝试拦截打印机作业并更改打印作业的属性。我可以拦截打印作业并获取有关它的信息。我为此关注了这篇文章
http://www.codeproject.com/Questions/423178/printing-order-intercept-with-csharp
现在我想更改打印作业的纸张尺寸，为此我找到了这篇文章
http://social.msdn.microsoft.com/Forums/en/windowsxps/thread/8af6ba92-5d2c-444b-91f4-a8747739c1b7
但问题是我无法创建类 PrintCapabilities。我错过了什么吗？请帮忙。
我当前的代码如下所示：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Management;
using System.Printing;
namespace PrintJob
{
class EvenWatch
{
private ManagementEventWatcher manEWatch;
public EvenWatch(string host)
{
System.Management.ManagementScope oMs = new System.Management
.ManagementScope(@"\\" + host + @"\root\cimv2");
oMs.Connect();
manEWatch = new ManagementEventWatcher(oMs, new EventQuery("SELECT * FROM __InstanceCreationEvent WITHIN 0.1 WHERE TargetInstance ISA 'Win32_PrintJob'"));
manEWatch.EventArrived += new EventArrivedEventHandler(
mewPrintJobs_EventArrived);
manEWatch.Start();
}
static void mewPrintJobs_EventArrived(object sender, EventArrivedEventArgs e)
{
foreach (PropertyData prop in e.NewEvent.Properties)
{
string val = prop.Value == null ? "null" : prop.Value.ToString();
}
ManagementBaseObject printJob = (ManagementBaseObject)e.NewEvent.Properties["TargetInstance"].Value;
string v = "";
foreach (PropertyData propp in printJob.Properties)
{
string name = propp.Name;
string val = propp.Value == null ? "null" : propp.Value.ToString();
val += "\n";
v += name + ":" + val;
}
PrintQueue printerSpooler = null;
printerSpooler = new PrintQueue(new PrintServer(), "EPSON LQ-300+ /II ESC/P 2");
PrintJobSettings printJobSetting = printerSpooler.CurrentJobSettings;
string desc = printJobSetting.Description;
//printerSpooler.CurrentJobSettings.CurrentPrintTicket
Console.WriteLine("-------");
Console.WriteLine(v);
}
}
}