Provides access to local and remote processes and enables you to start and stop local system processes.
To browse the .NET Framework source code for this type, see the Reference Source.
Assembly: System (in System.dll)
<PermissionSetAttribute(SecurityAction.LinkDemand, Name := "FullTrust")> <HostProtectionAttribute(SecurityAction.LinkDemand, SharedState := True, Synchronization := True, ExternalProcessMgmt := True, SelfAffectingProcessMgmt := True)> <PermissionSetAttribute(SecurityAction.InheritanceDemand, Name := "FullTrust")> Public Class Process Inherits Component
Gets the base priority of the associated process.
Gets a value indicating whether the component can raise an event.(Inherited from Component.)
Gets or sets whether the Exited event should be raised when the process terminates.
Gets the value that the associated process specified when it terminated.
Gets the time that the associated process exited.
Gets the native handle of the associated process.
Gets the number of handles opened by the process.
Gets a value indicating whether the associated process has been terminated.
Gets the unique identifier for the associated process.
Gets the name of the computer the associated process is running on.
Gets the main module for the associated process.
Gets the window handle of the main window of the associated process.
Gets the caption of the main window of the process.
Gets or sets the maximum allowable working set size, in bytes, for the associated process.
Gets or sets the minimum allowable working set size, in bytes, for the associated process.
Gets the modules that have been loaded by the associated process.
Obsolete.Gets the amount of nonpaged system memory, in bytes, allocated for the associated process.
Gets the amount of nonpaged system memory, in bytes, allocated for the associated process.
Obsolete.Gets the amount of paged memory, in bytes, allocated for the associated process.
Gets the amount of paged memory, in bytes, allocated for the associated process.
Obsolete.Gets the amount of pageable system memory, in bytes, allocated for the associated process.
Gets the amount of pageable system memory, in bytes, allocated for the associated process.
Obsolete.Gets the maximum amount of memory in the virtual memory paging file, in bytes, used by the associated process.
Gets the maximum amount of memory in the virtual memory paging file, in bytes, used by the associated process.
Obsolete.Gets the maximum amount of virtual memory, in bytes, used by the associated process.
Gets the maximum amount of virtual memory, in bytes, used by the associated process.
Obsolete.Gets the peak working set size for the associated process, in bytes.
Gets the maximum amount of physical memory, in bytes, used by the associated process.
Gets or sets a value indicating whether the associated process priority should temporarily be boosted by the operating system when the main window has the focus.
Gets or sets the overall priority category for the associated process.
Obsolete.Gets the amount of private memory, in bytes, allocated for the associated process.
Gets the amount of private memory, in bytes, allocated for the associated process.
Gets the privileged processor time for this process.
Gets the name of the process.
Gets or sets the processors on which the threads in this process can be scheduled to run.
Gets a value indicating whether the user interface of the process is responding.
Gets the native handle to this process.
Gets the Terminal Services session identifier for the associated process.
Gets a stream used to read the error output of the application.
Gets a stream used to write the input of the application.
Gets a stream used to read the textual output of the application.
Gets or sets the properties to pass to the Start method of the .
Gets the time that the associated process was started.
Gets or sets the object used to marshal the event handler calls that are issued as a result of a process exit event.
Gets the set of threads that are running in the associated process.
Gets the total processor time for this process.
Gets the user processor time for this process.
Obsolete.Gets the size of the process's virtual memory, in bytes.
Gets the amount of the virtual memory, in bytes, allocated for the associated process.
Obsolete.Gets the associated process's physical memory usage, in bytes.
Gets the amount of physical memory, in bytes, allocated for the associated process.
Begins asynchronous read operations on the redirected StandardError stream of the application.
Begins asynchronous read operations on the redirected StandardOutput stream of the application.
Cancels the asynchronous read operation on the redirected StandardError stream of an application.
Cancels the asynchronous read operation on the redirected StandardOutput stream of an application.
Frees all the resources that are associated with this component.
Closes a process that has a user interface by sending a close message to its main window.
Creates an object that contains all the relevant information required to generate a proxy used to communicate with a remote object.(Inherited from MarshalByRefObject.)
This API supports the product infrastructure and is not intended to be used directly from your code. Release all resources used by this process.(Overrides Component.Dispose(Boolean).)
Puts acomponent in state to interact with operating system processes that run in a special mode by enabling the native property SeDebugPrivilege on the current thread.
Determines whether the specified object is equal to the current object.(Inherited from Object.)
Gets a newcomponent and associates it with the currently active process.
Serves as the default hash function. (Inherited from Object.)
Retrieves the current lifetime service object that controls the lifetime policy for this instance.(Inherited from MarshalByRefObject.)
Returns a newcomponent, given the identifier of a process on the local computer.
Returns a newcomponent, given a process identifier and the name of a computer on the network.
Creates a newcomponent for each process resource on the local computer.
Creates a newcomponent for each process resource on the specified computer.
Creates an array of newcomponents and associates them with all the process resources on the local computer that share the specified process name.
Creates an array of newcomponents and associates them with all the process resources on a remote computer that share the specified process name.
Obtains a lifetime service object to control the lifetime policy for this instance.(Inherited from MarshalByRefObject.)
Immediately stops the associated process.
Takes acomponent out of the state that lets it interact with operating system processes that run in a special mode.
Raises the Exited event.
Discards any information about the associated process that has been cached inside the process component.
Starts (or reuses) the process resource that is specified by the StartInfo property of this component and associates it with the component.
Starts the process resource that is specified by the parameter containing process start information (for example, the file name of the process to start) and associates the resource with a newcomponent.
Starts a process resource by specifying the name of a document or application file and associates the resource with a newcomponent.
Starts a process resource by specifying the name of an application and a set of command-line arguments, and associates the resource with a newcomponent.
|Start(String, String, SecureString, String)|
Starts a process resource by specifying the name of an application, a user name, a password, and a domain and associates the resource with a newcomponent.
|Start(String, String, String, SecureString, String)|
Starts a process resource by specifying the name of an application, a set of command-line arguments, a user name, a password, and a domain and associates the resource with a newcomponent.
Formats the process's name as a string, combined with the parent component type, if applicable.(Overrides Component.ToString().)
Instructs thecomponent to wait indefinitely for the associated process to exit.
Instructs thecomponent to wait the specified number of milliseconds for the associated process to exit.
Causes thecomponent to wait indefinitely for the associated process to enter an idle state. This overload applies only to processes with a user interface and, therefore, a message loop.
Causes thecomponent to wait the specified number of milliseconds for the associated process to enter an idle state. This overload applies only to processes with a user interface and, therefore, a message loop.
Occurs when an application writes to its redirected StandardError stream.
Occurs when a process exits.
Occurs each time an application writes a line to its redirected StandardOutput stream.
To view the .NET Framework source code for this type, see the Reference Source. You can browse through the source code online, download the reference for offline viewing, and step through the sources (including patches and updates) during debugging; see instructions.
Acomponent provides access to a process that is running on a computer. A process, in the simplest terms, is a running app. A thread is the basic unit to which the operating system allocates processor time. A thread can execute any part of the code of the process, including parts currently being executed by another thread.
Thecomponent is a useful tool for starting, stopping, controlling, and monitoring apps. You can use the component, to obtain a list of the processes that are running, or you can start a new process. A component is used to access system processes. After a component has been initialized, it can be used to obtain information about the running process. Such information includes the set of threads, the loaded modules (.dll and .exe files), and performance information such as the amount of memory the process is using.
This type implements the IDisposable interface. When you have finished using the type, you should dispose of it either directly or indirectly. To dispose of the type directly, call its Dispose method in a try/catch block. To dispose of it indirectly, use a language construct such as using (in C#) or Using (in Visual Basic). For more information, see the “Using an Object that Implements IDisposable” section in the IDisposable interface topic.
32-bit processes cannot access the modules of a 64-bit process. If you try to get information about a 64-bit process from a 32-bit process, you will get a Win32Exception exception. A 64-bit process, on the other hand, can access the modules of a 32-bit process.
The process component obtains information about a group of properties all at once. After the Refresh method. Therefore, a property value is not guaranteed to be any newer than the last call to the Refresh method. The group breakdowns are operating-system dependent.component has obtained information about one member of any group, it will cache the values for the other properties in that group and not obtain new information about the other members of the group until you call the
If you have a path variable declared in your system using quotes, you must fully qualify that path when starting any process found in that location. Otherwise, the system will not find the path. For example, if c:\mypath is not in your path, and you add it using quotation marks: path = %path%;"c:\mypath", you must fully qualify any process in c:\mypath when starting it.
A system process is uniquely identified on the system by its process identifier. Like many Windows resources, a process is also identified by its handle, which might not be unique on the computer. A handle is the generic term for an identifier of a resource. The operating system persists the process handle, which is accessed through the Handle property of the component, even when the process has exited. Thus, you can get the process's administrative information, such as the ExitCode (usually either zero for success or a nonzero error code) and the ExitTime. Handles are an extremely valuable resource, so leaking handles is more virulent than leaking memory.
In the .NET Framework on the desktop, the Console encodings, which are typically code page encodings, for the input, output, and error streams. For example code, on systems whose culture is English (United States), code page 437 is the default encoding for the Console class. However, .NET Core may make only a limited subset of these encodings available. If this is the case, it uses Encoding.UTF8 as the default encoding.class by default uses
If aobject depends on specific code page encodings, you can still make them available by doing the following before you call any methods:
Add a reference to the System.Text.Encoding.CodePages.dll assembly to your project.
Theclass will then automatically use the default system encoding rather than UTF8, provided that you have registered the encoding provider before calling any methods.
The following example uses an instance of theclass to start a process.
Imports System Imports System.Diagnostics Imports System.ComponentModel Namespace MyProcessSample Class MyProcess Public Shared Sub Main() Dim myProcess As New Process() Try myProcess.StartInfo.UseShellExecute = False ' You can start any process, HelloWorld is a do-nothing example. myProcess.StartInfo.FileName = "C:\\HelloWorld.exe" myProcess.StartInfo.CreateNoWindow = True myProcess.Start() ' This code assumes the process you are starting will terminate itself. ' Given that is is started without a window so you cannot terminate it ' on the desktop, it must terminate itself or you can do it programmatically ' from this application using the Kill method. Catch e As Exception Console.WriteLine((e.Message)) End Try End Sub 'Main End Class End Namespace
The following example uses the Start method to start a process.class itself and a static
Imports System.Diagnostics Imports System.ComponentModel Namespace MyProcessSample Class MyProcess ' Opens the Internet Explorer application. Public Sub OpenApplication(myFavoritesPath As String) ' Start Internet Explorer. Defaults to the home page. Process.Start("IExplore.exe") ' Display the contents of the favorites folder in the browser. Process.Start(myFavoritesPath) End Sub 'OpenApplication ' Opens urls and .html documents using Internet Explorer. Sub OpenWithArguments() ' url's are not considered documents. They can only be opened ' by passing them as arguments. Process.Start("IExplore.exe", "www.northwindtraders.com") ' Start a Web page using a browser associated with .html and .asp files. Process.Start("IExplore.exe", "C:\myPath\myFile.htm") Process.Start("IExplore.exe", "C:\myPath\myFile.asp") End Sub 'OpenWithArguments ' Uses the ProcessStartInfo class to start new processes, ' both in a minimized mode. Sub OpenWithStartInfo() Dim startInfo As New ProcessStartInfo("IExplore.exe") startInfo.WindowStyle = ProcessWindowStyle.Minimized Process.Start(startInfo) startInfo.Arguments = "www.northwindtraders.com" Process.Start(startInfo) End Sub 'OpenWithStartInfo Shared Sub Main() ' Get the path that stores favorite links. Dim myFavoritesPath As String = Environment.GetFolderPath(Environment.SpecialFolder.Favorites) Dim myProcess As New MyProcess() myProcess.OpenApplication(myFavoritesPath) myProcess.OpenWithArguments() myProcess.OpenWithStartInfo() End Sub 'Main End Class 'MyProcess End Namespace 'MyProcessSample
The following F# example defines a runProc function that starts a process, captures all output and error information, and records the number of milliseconds that the process has run. The runProc function has three parameters: the name of application to launch, the arguments to supply to the application, and the starting directory.
open System open System.Diagnostics let runProc filename args startDir : seq<string> * seq<string> = let timer = Stopwatch.StartNew() let procStartInfo = ProcessStartInfo( RedirectStandardOutput = true, RedirectStandardError = true, UseShellExecute = false, FileName = filename, Arguments = args ) match startDir with | Some d -> procStartInfo.WorkingDirectory <- d | _ -> () let outputs = System.Collections.Generic.List<string>() let errors = System.Collections.Generic.List<string>() let outputHandler f (_sender:obj) (args:DataReceivedEventArgs) = f args.Data use p = new Process(StartInfo = procStartInfo) p.OutputDataReceived.AddHandler(DataReceivedEventHandler (outputHandler outputs.Add)) p.ErrorDataReceived.AddHandler(DataReceivedEventHandler (outputHandler errors.Add)) let started = try p.Start() with | ex -> ex.Data.Add("filename", filename) reraise() if not started then failwithf "Failed to start process %s" filename printfn "Started %s with pid %i" p.ProcessName p.Id p.BeginOutputReadLine() p.BeginErrorReadLine() p.WaitForExit() timer.Stop() printfn "Finished %s after %A milliseconds" filename timer.ElapsedMilliseconds let cleanOut l = l |> Seq.filter (fun o -> String.IsNullOrEmpty o |> not) cleanOut outputs,cleanOut errors
Available since 1.1
Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.