ProcessStartInfo.RedirectStandardInput Eigenschaft

public:
 property bool RedirectStandardInput { bool get(); void set(bool value); };

public bool RedirectStandardInput { get; set; }

member this.RedirectStandardInput : bool with get, set

Public Property RedirectStandardInput As Boolean

Eigenschaftswert

true, wenn die Eingabe von StandardInput gelesen werden soll; andernfalls false. Der Standardwert ist false.

Beispiele

Im folgenden Beispiel wird veranschaulicht, wie der StandardInput Stream eines Prozesses umgeleitet wird. Der sort Befehl ist eine Konsolenanwendung, die Texteingaben liest und sortiert.

Im Beispiel wird der sort Befehl mit einer umgeleiteten Eingabe gestartet. Anschließend fordert er den Benutzer zur Eingabe von Text auf und übergibt den Text über den umgeleiteten StandardInput Stream an den sort Prozess. Die sort Ergebnisse werden dem Benutzer in der Konsole angezeigt.

#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
    End Class  'StandardInputTest
End Namespace 'Process_StandardInput_Sample

Hinweise

Ein Process kann Eingabetext aus dem Standardeingabestream lesen, in der Regel über die Tastatur. Durch Umleiten des StandardInput Datenstroms können Sie die Eingabe eines Prozesses programmgesteuert angeben. Anstatt beispielsweise die Tastatureingabe zu verwenden, können Sie Text aus dem Inhalt einer bestimmten Datei oder ausgabe aus einer anderen Anwendung bereitstellen.

Gilt für:

Weitere Informationen

• UseShellExecute
• StandardInput