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StopProcessSample02 Örneği

Bu örnek, yerel bilgisayardaki işlemleri durdururken hata ayıklama (WriteDebug), ayrıntılı (WriteVerbose) ve uyarı (WriteWarning) iletileri yazan bir cmdlet'in nasıl yazıldığını gösterir. Bu cmdlet, Windows PowerShell 2.0 tarafından sağlanan Stop-Process cmdlet'ine benzer.

Visual Studio kullanarak örnek oluşturma

  1. Windows Internet Explorer'ı açın ve Örnekler dizininin altındaki StopProcessSample02 dizinine gidin.

    Windows PowerShell 2.0 SDK'sı yüklü olarak StopProcessSample02 klasörüne gidin. Varsayılan konum C:\Program Files (x86)\Microsoft SDKs\Windows\v7.0\Samples\sysmgmt\WindowsPowerShell\csharp\StopProcessSample02.

  2. Çözüm (.sln) dosyasının simgesine çift tıklayın. Bu işlem örnek projeyi Microsoft Visual Studio'da açar.

  3. Derleme menüsünde Çözümü Derle 'ı seçerek varsayılan \bin veya \bin\debug klasörlerinde örneğin kitaplığını oluşturun.

Örneği çalıştırma

  1. Aşağıdaki modül klasörünü oluşturun:

    [user]\Documents\WindowsPowerShell\Modules\StopProcessSample02

  2. Örnek derlemeyi modül klasörüne kopyalayın.

  3. Windows PowerShell’i başlatın.

  4. Derlemeyi Windows PowerShell'e yüklemek için aşağıdaki komutu çalıştırın:

    Import-Module stopprossessample02

  5. Cmdlet'ini çalıştırmak için aşağıdaki komutu çalıştırın:

    Stop-Proc

Gereksinimler

Bu örnek Için Windows PowerShell 2.0 gerekir.

Gösterir

Bu örnekte aşağıdakiler gösterilmektedir.

Örnek

Bu örnek, WriteDebug, WriteVerboseve WriteWarning yöntemlerini kullanarak hata ayıklama, ayrıntılı ve uyarı iletileri yazmayı gösterir.

using System;
using System.Diagnostics;
using System.Collections;
using Win32Exception = System.ComponentModel.Win32Exception;
using System.Management.Automation;             //Windows PowerShell namespace
using System.Globalization;

namespace Microsoft.Samples.PowerShell.Commands
{
   #region StopProcCommand

    /// <summary>
   /// This class implements the Stop-Proc cmdlet.
   /// </summary>
   [Cmdlet(VerbsLifecycle.Stop, "Proc",
       SupportsShouldProcess = true)]
   public class StopProcCommand : Cmdlet
   {
       #region Parameters

      /// <summary>
      /// This parameter provides the list of process names on
      /// which the Stop-Proc cmdlet will work.
      /// </summary>
       [Parameter(
          Position = 0,
          Mandatory = true,
          ValueFromPipeline = true,
          ValueFromPipelineByPropertyName = true
       )]
       public string[] Name
       {
          get { return processNames; }
          set { processNames = value; }
       }
       private string[] processNames;

       /// <summary>
       /// This parameter overrides the ShouldContinue call to force
       /// the cmdlet to stop its operation. This parameter should always
       /// be used with caution.
       /// </summary>
       [Parameter]
       public SwitchParameter Force
       {
           get { return force; }
           set { force = value; }
       }
       private bool force;

       /// <summary>
       /// This parameter indicates that the cmdlet should return
       /// an object to the pipeline after the processing has been
       /// completed.
       /// </summary>
       [Parameter]
       public SwitchParameter PassThru
       {
           get { return passThru; }
           set { passThru = value; }
       }
       private bool passThru;

       #endregion Parameters

       #region Cmdlet Overrides

       /// <summary>
       /// The ProcessRecord method does the following for each of the
       /// requested process names:
       /// 1) Check that the process is not a critical process.
       /// 2) Attempt to stop that process.
       /// If no process is requested then nothing occurs.
       /// </summary>
       protected override void ProcessRecord()
       {
           foreach (string name in processNames)
           {
               string message = null;

               // For every process name passed to the cmdlet, get the associated
               // processes.
               // Write a non-terminating error for failure to retrieve
               // a process.

               // Write a user-friendly verbose message to the pipeline. These
               // messages are intended to give the user detailed information
               // on the operations performed by the cmdlet. These messages will
               // appear with the -Verbose option.
               message = String.Format(CultureInfo.CurrentCulture,
                              "Attempting to stop process \"{0}\".", name);
               WriteVerbose(message);

               Process[] processes;

               try
               {
                   processes = Process.GetProcessesByName(name);
               }
               catch (InvalidOperationException ioe)
               {
                   WriteError(new ErrorRecord(ioe,
                                     "UnableToAccessProcessByName",
                                         ErrorCategory.InvalidOperation,
                                             name));
                   continue;
               }

               // Try to stop the processes that have been retrieved.
               foreach (Process process in processes)
               {
                   string processName;

                   try
                   {
                       processName = process.ProcessName;
                   }
                   catch (Win32Exception e)
                   {
                       WriteError(new ErrorRecord(e, "ProcessNameNotFound",
                                         ErrorCategory.ObjectNotFound, process));
                       continue;
                   }

                   // Write a debug message to the host that can be used when
                   // troubleshooting a problem. All debug messages will appear
                   // with the -Debug option.
                   message = String.Format(CultureInfo.CurrentCulture,
                                 "Acquired name for pid {0} : \"{1}\"",
                                        process.Id, processName);
                   WriteDebug(message);

                   // Confirm the operation first.
                   // This is always false if the WhatIf parameter is specified.
                   if (!ShouldProcess(string.Format(CultureInfo.CurrentCulture,
                                        "{0} ({1})",
                                            processName, process.Id)))
                   {
                       continue;
                   }

                   // Make sure that the user really wants to stop a critical
                   // process that can possibly stop the computer.
                   bool criticalProcess = criticalProcessNames.Contains(processName.ToLower(CultureInfo.CurrentCulture));

                   if (criticalProcess && !force)
                   {
                       message = String.Format(CultureInfo.CurrentCulture,
                                    "The process \"{0}\" is a critical process and should not be stopped. Are you sure you wish to stop the process?",
                                        processName);

                       // It is possible that the ProcessRecord method is called
                       // multiple times when objects are received as inputs from
                       // the pipeline. So to retain YesToAll and NoToAll input that
                       // the user may enter across multiple calls to this function,
                       // they are stored as private members of the cmdlet.
                       if (!ShouldContinue(message, "Warning!",
                                    ref yesToAll, ref noToAll))
                       {
                           continue;
                       }
                   } // if (criticalProcess...

                   // Display a warning message if the cmdlet is stopping a
                   // critical process.
                   if (criticalProcess)
                   {
                       message = String.Format(CultureInfo.CurrentCulture,
                                     "Stopping the critical process \"{0}\".",
                                          processName);
                       WriteWarning(message);
                   } // if (criticalProcess...

                   // Stop the named process.
                   try
                   {
                       process.Kill();
                   }
                   catch (Exception e)
                   {
                       if ((e is Win32Exception) || (e is SystemException) ||
                           (e is InvalidOperationException))
                       {
                           // This process could not be stopped so write
                           // a non-terminating error.
                           WriteError(new ErrorRecord(
                                            e,
                                            "CouldNotStopProcess",
                                            ErrorCategory.CloseError,
                                            process)
                                      );
                           continue;
                       } // if ((e is...
                           else throw;
                   } // catch

                   message = String.Format(CultureInfo.CurrentCulture,
                                  "Stopped process \"{0}\", pid {1}.",
                                        processName, process.Id);

                   WriteVerbose(message);

                   // If the PassThru parameter is specified,
                   // return the terminated process object to the pipeline.
                   if (passThru)
                   {
                       message = String.Format(CultureInfo.CurrentCulture,
                                     "Writing process \"{0}\" to pipeline",
                                          processName);
                       WriteDebug(message);
                       WriteObject(process);
                   } // if (passThru...
               } // foreach (Process...
            } // foreach (string...
        } // ProcessRecord

       #endregion Cmdlet Overrides

       #region Private Data

       private bool yesToAll, noToAll;

       /// <summary>
       /// Partial list of critical processes that should not be
       /// stopped.  Lower case is used for case insensitive matching.
       /// </summary>
       private ArrayList criticalProcessNames = new ArrayList(
          new string[] { "system", "winlogon", "spoolsv" }
       );

       #endregion Private Data

   } // StopProcCommand

   #endregion StopProcCommand
}

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