ProcessStartInfo.RedirectStandardInput Eigenschaft

Definition

Ruft einen Wert ab, der angibt, ob die Eingabe für eine Anwendung aus dem StandardInput-Datenstrom gelesen wird, oder legt diesen fest.Gets or sets a value indicating whether the input for an application is read from the StandardInput stream.

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

Boolean

true, wenn die Eingabe von StandardInput gelesen werden soll; andernfalls false.true if input should be read from StandardInput; otherwise, false. Der Standardwert ist false.The default is false.

Beispiele

Im folgenden Beispiel wird veranschaulicht, wie der Daten StandardInput Strom eines Prozesses umgeleitet wird.The following example illustrates how to redirect the StandardInput stream of a process. Der sort Befehl ist eine Konsolenanwendung, die Texteingaben liest und sortiert.The sort command is a console application that reads and sorts text input.

Im Beispiel wird der sort Befehl mit umgeleiteter Eingabe gestartet.The example starts the sort command with redirected input. Anschließend wird der Benutzer zur Eingabe von Text aufgefordert, und der Text wird sort über den umgeleiteten Stream an den Prozess weitergeleitet StandardInput .It then prompts the user for text, and passes the text to the sort process through the redirected StandardInput stream. Die sort Ergebnisse werden dem Benutzer in der Konsole angezeigt.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
    End Class  'StandardInputTest
End Namespace 'Process_StandardInput_Sample

Hinweise

Eine Process kann den Eingabetext aus dem Standardeingabestream lesen, in der Regel die Tastatur.A Process can read input text from its standard input stream, typically the keyboard. Wenn Sie den Stream umleiten StandardInput , können Sie die Eingabe eines Prozesses Programm gesteuert angeben.By redirecting the StandardInput stream, you can programmatically specify the input of a process. Anstatt Tastatureingaben zu verwenden, können Sie z. b. Text aus dem Inhalt einer angegebenen Datei oder Ausgabe einer anderen Anwendung bereitstellen.For example, instead of using keyboard input, you can provide text from the contents of a designated file or output from another application.

Hinweis

Sie müssen UseShellExecute auf festlegen, false Wenn Sie auf festlegen RedirectStandardInput möchten true .You must set UseShellExecute to false if you want to set RedirectStandardInput to true. Andernfalls löst das Schreiben in den StandardInput Stream eine Ausnahme aus.Otherwise, writing to the StandardInput stream throws an exception.

Gilt für:

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