Process.GetProcessById Method (Int32) (System.Diagnostics)

GetProcessById Method (Int32)

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Microsoft Visual Studio 2008/.NET Framework 3.5

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.NET Framework Class Library

Process..::.GetProcessById Method (Int32)

Returns a new Process component, given the identifier of a process on the local computer.

Namespace: System.Diagnostics
Assembly: System (in System.dll)

Syntax

Visual Basic (Declaration)

Public Shared Function GetProcessById ( _
    processId As Integer _
) As Process

Visual Basic (Usage)

Dim processId As Integer
Dim returnValue As Process

returnValue = Process.GetProcessById(processId)

public static Process GetProcessById(
    int processId
)

Visual C++

public:
static Process^ GetProcessById(
    int processId
)

JScript

public static function GetProcessById(
    processId : int
) : Process

Parameters

processId: Type: System..::.Int32
The system-unique identifier of a process resource.

Return Value

Type: System.Diagnostics..::.Process
A Process component that is associated with the local process resource identified by the processId parameter.

Exceptions

Exception	Condition
ArgumentException	The process specified by the processId parameter is not running. The identifier might be expired.

Remarks

Use this method to create a new Process component and associate it with a process resource on the local computer. The process resource must already exist on the computer, because GetProcessById(Int32) does not create a system resource, but rather associates a resource with an application-generated Process component. A process Id can be retrieved only for a process that is currently running on the computer. After the process terminates, GetProcessById(Int32) throws an exception if you pass it an expired identifier.

On any particular computer, the identifier of a process is unique. GetProcessById(Int32) returns one process at most. If you want to get all the processes running a particular application, use GetProcessesByName(String). If multiple processes exist on the computer running the specified application, GetProcessesByName(String) returns an array containing all the associated processes. You can query each of these processes in turn for its identifier. The process identifier can be viewed in the Processes panel of the Windows Task Manager. The PID column displays the process identifier that is assigned to a process.

Examples

The following example retrieves information of the current process, all instances of Notepad running on the local computer, all instances of Notepad running on a specific computer using the computer alias and an IP address, all processes running on the local computer and a remote computer, a specific process on the local computer or a remote computer using the process id.

Visual Basic

Imports System
Imports System.Diagnostics
Imports System.ComponentModel


Namespace MyProcessSample
    _
   '/ <summary>
   '/ Shell for the sample.
   '/ </summary>
   Class MyProcess




      Sub BindToRunningProcesses()
         ' Get the current process.
         Dim currentProcess As Process = Process.GetCurrentProcess()


         ' Get all instances of Notepad running on the local
         ' computer.
         Dim localByName As Process() = Process.GetProcessesByName("notepad")


         ' Get all instances of Notepad running on the specifiec
         ' computer.
         ' 1. Using the computer alias (do not precede with "\\").
         Dim remoteByName As Process() = Process.GetProcessesByName("notepad", "myComputer")

         ' 2. Using an IP address to specify the machineName parameter. 
         Dim ipByName As Process() = Process.GetProcessesByName("notepad", "169.0.0.0")


         ' Get all processes running on the local computer.
         Dim localAll As Process() = Process.GetProcesses()


         ' Get all processes running on the remote computer.
         Dim remoteAll As Process() = Process.GetProcesses("myComputer")


         ' Get a process on the local computer, using the process id.
         Dim localById As Process = Process.GetProcessById(1234)


         ' Get a process on a remote computer, using the process id.
         Dim remoteById As Process = Process.GetProcessById(2345, "myComputer")
      End Sub 'BindToRunningProcesses




      Shared Sub Main()

         Dim myProcess As New MyProcess()


         myProcess.BindToRunningProcesses()
      End Sub 'Main 
   End Class 'MyProcess
End Namespace 'MyProcessSample

using System;
using System.Diagnostics;
using System.ComponentModel;

namespace MyProcessSample
{
    /// <summary>
    /// Shell for the sample.
    /// </summary>
    class MyProcess
    {
        
       
        
        void BindToRunningProcesses()
        {
            // Get the current process.
            Process currentProcess = Process.GetCurrentProcess();

            
            // Get all instances of Notepad running on the local
            // computer.
            Process [] localByName = Process.GetProcessesByName("notepad");

            
            // Get all instances of Notepad running on the specifiec
            // computer.
            // 1. Using the computer alias (do not precede with "\\").
            Process [] remoteByName = Process.GetProcessesByName("notepad", "myComputer");
            
            // 2. Using an IP address to specify the machineName parameter. 
            Process [] ipByName = Process.GetProcessesByName("notepad", "169.0.0.0");
            
            
            // Get all processes running on the local computer.
            Process [] localAll = Process.GetProcesses();

            
            // Get all processes running on the remote computer.
            Process [] remoteAll = Process.GetProcesses("myComputer");

            
            // Get a process on the local computer, using the process id.
            Process localById = Process.GetProcessById(1234);

            
            // Get a process on a remote computer, using the process id.
            Process remoteById = Process.GetProcessById(2345, "myComputer");
            
        }
        


        static void Main()
        {

                   MyProcess myProcess = new MyProcess();
            

            myProcess.BindToRunningProcesses();

            }    
    }
}

Visual C++

#using <System.dll>

using namespace System;
using namespace System::Diagnostics;
using namespace System::ComponentModel;
int main()
{

   // Get the current process.
   Process^ currentProcess = Process::GetCurrentProcess();

   // Get all instances of Notepad running on the local
   // computer.
   array<Process^>^localByName = Process::GetProcessesByName( "notepad" );

   // Get all instances of Notepad running on the specific
   // computer.
   // 1. Using the computer alias (do not precede with "\\").
   array<Process^>^remoteByName = Process::GetProcessesByName( "notepad", "myComputer" );

   // 2. Using an IP address to specify the machineName parameter. 
   array<Process^>^ipByName = Process::GetProcessesByName( "notepad", "169.0.0.0" );

   // Get all processes running on the local computer.
   array<Process^>^localAll = Process::GetProcesses();

   // Get all processes running on the remote computer.
   array<Process^>^remoteAll = Process::GetProcesses( "myComputer" );

   // Get a process on the local computer, using the process id.
   Process^ localById = Process::GetProcessById( 1234 );

   // Get a process on a remote computer, using the process id.
   Process^ remoteById = Process::GetProcessById( 2345, "myComputer" );
}

.NET Framework Security

LinkDemand
for full trust for the immediate caller. This member cannot be used by partially trusted code.

Platforms

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Version Information

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 3.5, 2.0

Reference

Process Class

Process Members

GetProcessById Overload

System.Diagnostics Namespace

GetProcessesByName

GetProcesses

GetCurrentProcess