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

Definizione

Ottiene un flusso usato per scrivere l'input dell'applicazione.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

Valore della proprietà

Oggetto StreamWriter che può essere usato per scrivere il flusso di input standard dell'applicazione.A StreamWriter that can be used to write the standard input stream of the application.

Eccezioni

Il flusso StandardInput non è stato definito perché la proprietà RedirectStandardInput è impostata su false.The StandardInput stream has not been defined because RedirectStandardInput is set to false.

Esempi

L'esempio seguente illustra come reindirizzare il StandardInput flusso di un processo.The following example illustrates how to redirect the StandardInput stream of a process. Nell'esempio viene avviato il sort con input reindirizzato.The example starts the sort command with redirected input. Quindi chiede all'utente per il testo e lo passa al sort processo mediante il flusso StandardInput flusso.It then prompts the user for text, and passes that to the sort process by means of the redirected StandardInput stream. Il sort i risultati vengono visualizzati all'utente della 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
Imports System.IO
Imports System.Diagnostics
Imports System.ComponentModel
Imports Microsoft.VisualBasic

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

Commenti

Oggetto Process può leggere il testo di input dal rispettivo flusso di input standard, in genere la tastiera.A Process can read input text from its standard input stream, typically the keyboard. Mediante il reindirizzamento di StandardInput flusso, è possibile specificare a livello di codice l'input.By redirecting the StandardInput stream, you can programmatically specify the input. Invece di usare gli input da tastiera, ad esempio, è possibile fornire il testo dal contenuto di un file specificato o l'output da un'altra applicazione.For example, instead of using keyboard input, you can provide text from the contents of a designated file or output from another application.

Nota

Per utilizzare StandardInput, è necessario impostare ProcessStartInfo.UseShellExecute al false, ed è necessario impostare ProcessStartInfo.RedirectStandardInput a true.To use StandardInput, you must set ProcessStartInfo.UseShellExecute to false, and you must set ProcessStartInfo.RedirectStandardInput to true. In caso contrario, la scrittura di StandardInput stream genera un'eccezione.Otherwise, writing to the StandardInput stream throws an exception.

Sicurezza

LinkDemand
per un'attendibilità totale per il chiamante immediato.for full trust for the immediate caller. Impossibile utilizzare questo membro in codice parzialmente attendibile.This member cannot be used by partially trusted code.

Si applica a

Vedi anche