Process.StandardInput 屬性

定義

取得用來寫入應用程式輸入的資料流。Gets a stream used to write the input of the application.

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

屬性值

StreamWriter

StreamWriter,可用來寫入應用程式的標準輸入資料流。A StreamWriter that can be used to write the standard input stream of the application.

屬性

例外狀況

尚未定義 StandardInput 資料流,因為 RedirectStandardInput 已設定為 falseThe StandardInput stream has not been defined because RedirectStandardInput is set to false.

範例

下列範例說明如何重新導向進程的 StandardInput 資料流程。The following example illustrates how to redirect the StandardInput stream of a process. 此範例會使用重新導向的輸入來啟動 sort 命令。The example starts the sort command with redirected input. 接著,它會提示使用者輸入文字,並透過重新導向的串流將其傳遞至 sort 進程 StandardInputIt then prompts the user for text, and passes that to the sort process by means of the redirected StandardInput stream. sort系統會在主控台上對使用者顯示結果。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

備註

Process可以從標準輸入資料流程讀取輸入文字,通常是鍵盤。A Process can read input text from its standard input stream, typically the keyboard. 您可以藉由重新導向 StandardInput 資料流程,以程式設計方式指定輸入。By redirecting the StandardInput stream, you can programmatically specify the input. 例如,您可以從指定檔案的內容或另一個應用程式的輸出,提供文字,而不是使用鍵盤輸入。For example, instead of using keyboard input, you can provide text from the contents of a designated file or output from another application.

注意

若要使用 StandardInput ,您必須將設定 ProcessStartInfo.UseShellExecutefalse ,而且必須將設定 ProcessStartInfo.RedirectStandardInputtrueTo use StandardInput, you must set ProcessStartInfo.UseShellExecute to false, and you must set ProcessStartInfo.RedirectStandardInput to true. 否則,寫入資料流程時,會擲回 StandardInput 例外狀況。Otherwise, writing to the StandardInput stream throws an exception.

適用於

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