Process.StandardInput Process.StandardInput Process.StandardInput Process.StandardInput Property

Définition

Obtient un flux utilisé pour écrire l'entrée de l'application.Gets a stream used to write the input of the application.

public:
 property System::IO::StreamWriter ^ StandardInput { System::IO::StreamWriter ^ get(); };
[System.ComponentModel.Browsable(false)]
public System.IO.StreamWriter StandardInput { get; }
member this.StandardInput : System.IO.StreamWriter
Public ReadOnly Property StandardInput As StreamWriter

Valeur de propriété

StreamWriter qui peut être utilisé pour écrire le flux d'entrée standard de l'application.A StreamWriter that can be used to write the standard input stream of the application.

Exceptions

Le flux StandardInput n’a pas été défini, car RedirectStandardInput a la valeur false.The StandardInput stream has not been defined because RedirectStandardInput is set to false.

Exemples

L’exemple suivant montre comment rediriger le StandardInput flux d’un processus.The following example illustrates how to redirect the StandardInput stream of a process. L’exemple démarre la sort commande avec une entrée redirigée.The example starts the sort command with redirected input. Il invite ensuite l’utilisateur à entrer du texte et le transmet au sort processus au moyen du StandardInput flux Redirigé.It then prompts the user for text, and passes that to the sort process by means of the redirected StandardInput stream. Les sort résultats sont affichés à l’utilisateur sur la console.The sort results are displayed to the user on the console.

#using <System.dll>

using namespace System;
using namespace System::IO;
using namespace System::Diagnostics;
using namespace System::ComponentModel;
int main()
{
   Console::WriteLine(  "Ready to sort one or more text lines..." );
   
   // Start the Sort.exe process with redirected input.
   // Use the sort command to sort the input text.
   Process^ myProcess = gcnew Process;
   if ( myProcess )
   {
      myProcess->StartInfo->FileName =  "Sort.exe";
      myProcess->StartInfo->UseShellExecute = false;
      myProcess->StartInfo->RedirectStandardInput = true;
      myProcess->Start();
      StreamWriter^ myStreamWriter = myProcess->StandardInput;
      if ( myStreamWriter )
      {
         
         // Prompt the user for input text lines to sort. 
         // Write each line to the StandardInput stream of
         // the sort command.
         String^ inputText;
         int numLines = 0;
         do
         {
            Console::WriteLine(  "Enter a line of text (or press the Enter key to stop):" );
            inputText = Console::ReadLine();
            if ( inputText && inputText->Length > 0 )
            {
               numLines++;
               myStreamWriter->WriteLine( inputText );
            }
         }
         while ( inputText && inputText->Length != 0 );
         
         // Write a report header to the console.
         if ( numLines > 0 )
         {
            Console::WriteLine(  " {0} sorted text line(s) ", numLines.ToString() );
            Console::WriteLine(  "------------------------" );
         }
         else
         {
            Console::WriteLine(  " No input was sorted" );
         }
         
         // End the input stream to the sort command.
         // When the stream closes, the sort command
         // writes the sorted text lines to the 
         // console.
         myStreamWriter->Close();
      }
      
      // Wait for the sort process to write the sorted text lines.
      myProcess->WaitForExit();
      myProcess->Close();
   }
}


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

namespace ProcessStandardInputSample
{
    class StandardInputTest
    {
        static void Main()
        {
            Console.WriteLine("Ready to sort one or more text lines...");

            // Start the Sort.exe process with redirected input.
            // Use the sort command to sort the input text.
            using (Process myProcess = new Process())
            {
                myProcess.StartInfo.FileName = "Sort.exe";
                myProcess.StartInfo.UseShellExecute = false;
                myProcess.StartInfo.RedirectStandardInput = true;

                myProcess.Start();

                StreamWriter myStreamWriter = myProcess.StandardInput;

                // Prompt the user for input text lines to sort. 
                // Write each line to the StandardInput stream of
                // the sort command.
                String inputText;
                int numLines = 0;
                do
                {
                    Console.WriteLine("Enter a line of text (or press the Enter key to stop):");

                    inputText = Console.ReadLine();
                    if (inputText.Length > 0)
                    {
                        numLines++;
                        myStreamWriter.WriteLine(inputText);
                    }
                } while (inputText.Length > 0);

                // Write a report header to the console.
                if (numLines > 0)
                {
                    Console.WriteLine($" {numLines} sorted text line(s) ");
                    Console.WriteLine("------------------------");
                }
                else
                {
                    Console.WriteLine(" No input was sorted");
                }

                // End the input stream to the sort command.
                // When the stream closes, the sort command
                // writes the sorted text lines to the 
                // console.
                myStreamWriter.Close();

                // Wait for the sort process to write the sorted text lines.
                myProcess.WaitForExit();
            }
        }
    }
}

Imports System.IO
Imports System.Diagnostics
Imports System.ComponentModel

Namespace Process_StandardInput_Sample

    Class StandardInputTest

        Shared Sub Main()

            Console.WriteLine("Ready to sort one or more text lines...")

            ' Start the Sort.exe process with redirected input.
            ' Use the sort command to sort the input text.
            Using myProcess As New Process()

                myProcess.StartInfo.FileName = "Sort.exe"
                myProcess.StartInfo.UseShellExecute = False
                myProcess.StartInfo.RedirectStandardInput = True

                myProcess.Start()

                Dim myStreamWriter As StreamWriter = myProcess.StandardInput

                ' Prompt the user for input text lines to sort. 
                ' Write each line to the StandardInput stream of
                ' the sort command.
                Dim inputText As String
                Dim numLines As Integer = 0
                Do
                    Console.WriteLine("Enter a line of text (or press the Enter key to stop):")

                    inputText = Console.ReadLine()
                    If inputText.Length > 0 Then
                        numLines += 1
                        myStreamWriter.WriteLine(inputText)
                    End If
                Loop While inputText.Length <> 0


                ' Write a report header to the console.
                If numLines > 0 Then
                    Console.WriteLine($" {numLines} sorted text line(s) ")
                    Console.WriteLine("------------------------")
                Else
                    Console.WriteLine(" No input was sorted")
                End If

                ' End the input stream to the sort command.
                ' When the stream closes, the sort command
                ' writes the sorted text lines to the 
                ' console.
                myStreamWriter.Close()


                ' Wait for the sort process to write the sorted text lines.
                myProcess.WaitForExit()
            End Using

        End Sub 'Main
    End Class  'StandardInputTest
End Namespace 'Process_StandardInput_Sample

Remarques

Un Process peut lire du texte d’entrée à partir de son flux d’entrée standard, généralement le clavier.A Process can read input text from its standard input stream, typically the keyboard. En redirigeant le StandardInput flux, vous pouvez spécifier l’entrée par programmation.By redirecting the StandardInput stream, you can programmatically specify the input. Par exemple, au lieu d’utiliser l’entrée au clavier, vous pouvez fournir du texte à partir du contenu d’un fichier désigné ou d’une sortie d’une autre application.For example, instead of using keyboard input, you can provide text from the contents of a designated file or output from another application.

Notes

Pour utiliser StandardInput, vous devez affecter ProcessStartInfo.UseShellExecute à falsela valeur, et vous ProcessStartInfo.RedirectStandardInput devez trueaffecter à la valeur.To use StandardInput, you must set ProcessStartInfo.UseShellExecute to false, and you must set ProcessStartInfo.RedirectStandardInput to true. Sinon, l’écriture dans StandardInput le flux lève une exception.Otherwise, writing to the StandardInput stream throws an exception.

Sécurité

LinkDemand
pour une confiance totale pour l’appelant immédiat.for full trust for the immediate caller. Ce membre ne peut pas être utilisé par du code d'un niveau de confiance partiel.This member cannot be used by partially trusted code.

S’applique à

Voir aussi