PrintQueue.Refresh 方法

定义

命名空间:

System.Printing

程序集:

System.Printing.dll

使用来自打印机的值和计算机上运行的打印队列实用工具更新 PrintQueue 对象的属性。

public override void Refresh();

例外

PrintSystemException

有些属性未能刷新。

示例

以下示例演示如何在调查所有打印机中将此方法用作可能的错误状态的一部分。

// Survey queue status for every queue on every print server
String line;
String statusReport = "\n\nAny problem states are indicated below:\n\n";
while ((line = fileOfPrintServers.ReadLine()) != null)
 {
     PrintServer myPS = new PrintServer(line, PrintSystemDesiredAccess.AdministrateServer);
     PrintQueueCollection myPrintQueues = myPS.GetPrintQueues();
     statusReport = statusReport + "\n" + line;
     foreach (PrintQueue pq in myPrintQueues)
     {
         pq.Refresh();
         statusReport = statusReport + "\n\t" + pq.Name + ":";
         if (useAttributesResponse == "y")
         {
             TroubleSpotter.SpotTroubleUsingQueueAttributes(ref statusReport, pq);
             // TroubleSpotter class is defined in the complete example.
         }
         else
         {
             TroubleSpotter.SpotTroubleUsingProperties(ref statusReport, pq);
         }                 
     }// end for each print queue
 }// end while list of print servers is not yet exhausted

fileOfPrintServers.Close();
Console.WriteLine(statusReport);
Console.WriteLine("\nPress Return to continue.");
Console.ReadLine();

注解

程序对 PrintQueue 对象属性所做的更改在执行时 Refresh 会丢失，除非它们已写入打印机并使用 打印队列 Commit。

另请参阅

• Commit()