Process.GetProcessById Method (Int32, String)

Returns a new Process component, given a process identifier and the name of a computer on the network.

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

public static Process GetProcessById(
	int processId,
	string machineName
)

Parameters

processId
Type: System.Int32

The system-unique identifier of a process resource.

machineName
Type: System.String

The name of a computer on the network.

Return Value

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

ExceptionCondition
ArgumentException

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

-or-

The machineName parameter syntax is invalid. The name might have length zero (0).

ArgumentNullException

The machineName parameter is null.

InvalidOperationException

The process was not started by this object.

Use this method to create a new Process component and associate it with a process resource on a remote computer on the network. The process resource must already exist on the specified computer, because GetProcessById(Int32, String) 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, String) throws an exception if you pass it an expired identifier.

On any particular computer, the identifier of a process is unique. GetProcessById(Int32, String) 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.

If you do not specify a machineName, the local computer is used. Alternatively, you can specify the local computer by setting machineName to the value "." or to an empty string ("").

Windows 98, Windows Millennium Edition Platform Note: The machineName parameter is not supported on Windows 98 or Windows Millennium Edition (Windows Me).

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.

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

namespace MyProcessSample
{
	class MyProcess
	{		
		void BindToRunningProcesses()
		{
			// Get the current process. You can use currentProcess from this point 
            // to access various properties and call methods to control the 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 specific 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();
        }	
	}
}

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

  • LinkDemand 

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

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