C#如何获取打印列表里的Jobid

如题：
C#如何获取打印列表里的Jobid，因为我需要暂停或者取消打印队列的某个任务
我上网查了很多资料，都只能找到这些
public static StringCollection GetPrintJobsCollection(string printerName)
{
StringCollection printJobCollection = new StringCollection();
string searchQuery = "SELECT * FROM Win32_PrintJob";

/*searchQuery can also be mentioned with where Attribute,
but this is not working in Windows 2000 / ME / 98 machines
and throws Invalid query error*/
ManagementObjectSearcher searchPrintJobs =
new ManagementObjectSearcher(searchQuery);
ManagementObjectCollection prntJobCollection = searchPrintJobs.Get();
foreach(ManagementObject prntJob in prntJobCollection)
{
System.String jobName = prntJob.Properties["Name"].Value.ToString();

//Job name would be of the format [Printer name], [Job ID]
char[] splitArr = new char[1];
splitArr[0] = Convert.ToChar(",");
string prnterName = jobName.Split(splitArr)[0];
string documentName = prntJob.Properties["Document"].Value.ToString();
if(String.Compare(prnterName, printerName, true) == 0)
{
printJobCollection.Add(documentName);
}
}
return printJobCollection;
}

public static bool PausePrintJob(string printerName, int printJobID)
{
bool isActionPerformed = false;
string searchQuery = "SELECT * FROM Win32_PrintJob";
ManagementObjectSearcher searchPrintJobs =
new ManagementObjectSearcher(searchQuery);
ManagementObjectCollection prntJobCollection = searchPrintJobs.Get();
foreach(ManagementObject prntJob in prntJobCollection)
{
System.String jobName = prntJob.Properties["Name"].Value.ToString();
//Job name would be of the format [Printer name], [Job ID]
char[] splitArr = new char[1];
splitArr[0] = Convert.ToChar(",");
string prnterName = jobName.Split(splitArr)[0];
int prntJobID = Convert.ToInt32(jobName.Split(splitArr)[1]);
string documentName = prntJob.Properties["Document"].Value.ToString();
if(String.Compare(prnterName, printerName, true) == 0)
{
if(prntJobID == printJobID)
{
prntJob.InvokeMethod("Pause", null);
isActionPerformed = true;
break;
}
}
}
return isActionPerformed;
}

public static bool CancelPrintJob(string printerName, int printJobID)
{
bool isActionPerformed = false;
string searchQuery = "SELECT * FROM Win32_PrintJob";
ManagementObjectSearcher searchPrintJobs =
new ManagementObjectSearcher(searchQuery);
ManagementObjectCollection prntJobCollection = searchPrintJobs.Get();
foreach(ManagementObject prntJob in prntJobCollection)
{
System.String jobName = prntJob.Properties["Name"].Value.ToString();
//Job name would be of the format [Printer name], [Job ID]
char[] splitArr = new char[1];
splitArr[0] = Convert.ToChar(",");
string prnterName = jobName.Split(splitArr)[0];
int prntJobID = Convert.ToInt32(jobName.Split(splitArr)[1]);
string documentName = prntJob.Properties["Document"].Value.ToString();
if(String.Compare(prnterName, printerName, true) == 0)
{
if(prntJobID == printJobID)
{
//performs a action similar to the cancel
//operation of windows print console
prntJob.Delete();
isActionPerformed = true;
break;
}
}
}
return isActionPerformed;
}
第二个方法需要传递printJobID 请问如何获取？ 请大侠们指教