DataReceivedEventArgsとは? わかりやすく解説

DataReceivedEventArgs クラス

メモ : このクラスは、.NET Framework version 2.0新しく追加されたものです。

OutputDataReceived イベントと ErrorDataReceived イベントデータ提供します

名前空間: System.Diagnostics
アセンブリ: System (system.dll 内)
構文構文

Public Class DataReceivedEventArgs
    Inherits EventArgs
Dim instance As DataReceivedEventArgs
public class DataReceivedEventArgs : EventArgs
public ref class DataReceivedEventArgs : public
 EventArgs
public class DataReceivedEventArgs extends
 EventArgs
public class DataReceivedEventArgs extends
 EventArgs
解説解説
使用例使用例

sort コマンドリダイレクトされた StandardOutput ストリームで、非同期読み取り操作実行するコード例次に示しますsort コマンドは、テキスト入力読み込み並べ替え実行するコンソール アプリケーションです。

この例では、SortOutputHandler イベント ハンドライベント デリゲート作成してOutputDataReceived イベント関連付けます。イベント ハンドラは、リダイレクトされた StandardOutput ストリームからテキスト行を受け取った後、そのテキスト書式設定して画面出力します

' Define the namespaces used by this sample.
Imports System
Imports System.Text
Imports System.IO
Imports System.Diagnostics
Imports System.Threading
Imports System.ComponentModel
Imports Microsoft.VisualBasic

Namespace ProcessAsyncStreamSamples
   
   Class ProcessAsyncOutputRedirection
      ' Define static variables shared by class methods.
      Private Shared sortOutput As
 StringBuilder = Nothing
      Private Shared numOutputLines As
 Integer = 0
      
      Public Shared Sub
 SortInputListText()
         
         ' Initialize the process and its StartInfo properties.
         ' The sort command is a console application that
         ' reads and sorts text input.
         Dim sortProcess As New
 Process()
         sortProcess.StartInfo.FileName = "Sort.exe"
         
         ' Set UseShellExecute to false for redirection.
         sortProcess.StartInfo.UseShellExecute = False
         
         ' Redirect the standard output of the sort command.  
         ' Read the stream asynchronously using an event handler.
         sortProcess.StartInfo.RedirectStandardOutput = True
         sortOutput = new StringBuilder()

         ' Set our event handler to asynchronously read the sort output.
         AddHandler sortProcess.OutputDataReceived, _
                    AddressOf SortOutputHandler
         
         ' Redirect standard input as well.  This stream
         ' is used synchronously.
         sortProcess.StartInfo.RedirectStandardInput = True
         
         ' Start the process.
         sortProcess.Start()
         
         ' Use a stream writer to synchronously write the sort input.
         Dim sortStreamWriter As StreamWriter
 = sortProcess.StandardInput
     
         ' Start the asynchronous read of the sort output stream.
         sortProcess.BeginOutputReadLine()
         
         ' Prompt the user for input text lines.  Write each 
         ' line to the redirected input stream of the sort command.
         Console.WriteLine("Ready to sort up to 50 lines of text")
         
         Dim inputText As String
         Dim numInputLines As Integer
 = 0
         Do
            Console.WriteLine("Enter a text line (or press the
 Enter key to stop):")
            
            inputText = Console.ReadLine()
            If Not String.IsNullOrEmpty(inputText)
 Then
               numInputLines += 1
               sortStreamWriter.WriteLine(inputText)
            End If
         Loop While Not
 String.IsNullOrEmpty(inputText) AndAlso numInputLines
 < 50
         Console.WriteLine("<end of input stream>")
         Console.WriteLine()
         
         ' End the input stream to the sort command.
         sortStreamWriter.Close()
         
         ' Wait for the sort process to write the sorted text lines.
         sortProcess.WaitForExit()
         
         If Not String.IsNullOrEmpty(numOutputLines)
 Then
            ' Write the formatted and sorted output to the console.
            Console.WriteLine(" Sort results = {0} sorted text
 line(s) ", _
                              numOutputLines)
            Console.WriteLine("----------")
            Console.WriteLine(sortOutput)
         Else
            Console.WriteLine(" No input lines were sorted.")
         End If
         
         sortProcess.Close()
      End Sub 
      
      Private Shared Sub
 SortOutputHandler(sendingProcess As Object,
 _
         outLine As DataReceivedEventArgs)

         ' Collect the sort command output.
         If Not String.IsNullOrEmpty(outLine.Data)
 Then
            numOutputLines += 1
            
            ' Add the text to the collected output.
            sortOutput.Append(Environment.NewLine + "["
 _
                         + numOutputLines.ToString() + "] - "
 _
                         + outLine.Data)
         End If
      End Sub 
   End Class  
End Namespace 
// Define the namespaces used by this sample.
using System;
using System.Text;
using System.IO;
using System.Diagnostics;
using System.Threading;
using System.ComponentModel;

namespace ProcessAsyncStreamSamples
{
    class SortOutputRedirection
    {
        // Define static variables shared by class methods.
        private static StringBuilder sortOutput
 = null;
        private static int
 numOutputLines = 0;
      
        public static void
 SortInputListText()
        {
            // Initialize the process and its StartInfo properties.
            // The sort command is a console application that
            // reads and sorts text input.

            Process sortProcess;
            sortProcess = new Process();
            sortProcess.StartInfo.FileName = "Sort.exe";
            
            // Set UseShellExecute to false for redirection.
            sortProcess.StartInfo.UseShellExecute = false;

            // Redirect the standard output of the sort command.  
            // This stream is read asynchronously using an event handler.
            sortProcess.StartInfo.RedirectStandardOutput = true;
            sortOutput = new StringBuilder("");

            // Set our event handler to asynchronously read the sort
 output.
            sortProcess.OutputDataReceived += new DataReceivedEventHandler(SortOutputHandler);

            // Redirect standard input as well.  This stream
            // is used synchronously.
            sortProcess.StartInfo.RedirectStandardInput = true;
  
            // Start the process.
            sortProcess.Start();

            // Use a stream writer to synchronously write the sort input.
            StreamWriter sortStreamWriter = sortProcess.StandardInput;

            // Start the asynchronous read of the sort output stream.
            sortProcess.BeginOutputReadLine();

            // Prompt the user for input text lines.  Write each 
            // line to the redirected input stream of the sort command.
            Console.WriteLine("Ready to sort up to 50 lines of text");

            String inputText;
            int numInputLines = 0;
            do 
            {
                Console.WriteLine("Enter a text line (or press the Enter key
 to stop):");
            
                inputText = Console.ReadLine();
                if (!String.IsNullOrEmpty(inputText))
                {
                    numInputLines ++;
                    sortStreamWriter.WriteLine(inputText);
                }
            }
            while (!String.IsNullOrEmpty(inputText) &&
 (numInputLines < 50));
            Console.WriteLine("<end of input stream>");
            Console.WriteLine();

            // End the input stream to the sort command.
            sortStreamWriter.Close();

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

            if (numOutputLines > 0)
            {
                // Write the formatted and sorted output to the console.
                Console.WriteLine(" Sort results = {0} sorted text line(s) ",
 
                    numOutputLines);
                Console.WriteLine("----------");
                Console.WriteLine(sortOutput);
            }
            else 
            {
                Console.WriteLine(" No input lines were sorted.");
            }

            sortProcess.Close();
        }

        private static void
 SortOutputHandler(object sendingProcess, 
            DataReceivedEventArgs outLine)
        {
            // Collect the sort command output.
            if (!String.IsNullOrEmpty(outLine.Data))
            {
                numOutputLines++;
    
                // Add the text to the collected output.
                sortOutput.Append(Environment.NewLine + 
                    "[" + numOutputLines.ToString() + "] - "
 + outLine.Data);
            }
        }
    }
}
// Define the namespaces used by this sample.
#using <System.dll>

using namespace System;
using namespace System::Text;
using namespace System::IO;
using namespace System::Diagnostics;
using namespace System::Threading;
using namespace System::ComponentModel;

ref class SortOutputRedirection
{
private:
   // Define static variables shared by class methods.
   static StringBuilder^ sortOutput = nullptr;
   static int numOutputLines = 0;

public:
   static void SortInputListText()
   {
      // Initialize the process and its StartInfo properties.
      // The sort command is a console application that
      // reads and sorts text input.

      Process^ sortProcess;
      sortProcess = gcnew Process;
      sortProcess->StartInfo->FileName = "Sort.exe";
      
      // Set UseShellExecute to false for redirection.
      sortProcess->StartInfo->UseShellExecute = false;
      
      // Redirect the standard output of the sort command.  
      // This stream is read asynchronously using an event handler.
      sortProcess->StartInfo->RedirectStandardOutput = true;
      sortOutput = gcnew StringBuilder;
      
      // Set our event handler to asynchronously read the sort output.
      sortProcess->OutputDataReceived += gcnew DataReceivedEventHandler( SortOutputHandler
 );
      
      // Redirect standard input as well.  This stream
      // is used synchronously.
      sortProcess->StartInfo->RedirectStandardInput = true;
      
      // Start the process.
      sortProcess->Start();
      
      // Use a stream writer to synchronously write the sort input.
      StreamWriter^ sortStreamWriter = sortProcess->StandardInput;
      
      // Start the asynchronous read of the sort output stream.
      sortProcess->BeginOutputReadLine();
      
      // Prompt the user for input text lines.  Write each 
      // line to the redirected input stream of the sort command.
      Console::WriteLine( "Ready to sort up to 50 lines of text" );

      String^ inputText;
      int numInputLines = 0;
      do
      {
         Console::WriteLine( "Enter a text line (or press the Enter key to stop):"
 );

         inputText = Console::ReadLine();
         if (  !String::IsNullOrEmpty( inputText ) )
         {
            numInputLines++;
            sortStreamWriter->WriteLine( inputText );
         }
      }
      while (  !String::IsNullOrEmpty( inputText ) &&
 (numInputLines < 50) );

      Console::WriteLine( "<end of input stream>" );
      Console::WriteLine();
      
      // End the input stream to the sort command.
      sortStreamWriter->Close();
      
      // Wait for the sort process to write the sorted text lines.
      sortProcess->WaitForExit();

      if ( numOutputLines > 0 )
      {
         
         // Write the formatted and sorted output to the console.
         Console::WriteLine( " Sort results = {0} sorted text line(s) "
,
            numOutputLines.ToString() );
         Console::WriteLine( "----------" );
         Console::WriteLine( sortOutput->ToString() );
      }
      else
      {
         Console::WriteLine( " No input lines were sorted." );
      }

      sortProcess->Close();
   }

private:
   static void SortOutputHandler( Object^ /*sendingProcess*/
,
      DataReceivedEventArgs^ outLine )
   {
      // Collect the sort command output.
      if (  !String::IsNullOrEmpty( outLine->Data ) )
      {
         numOutputLines++;
         
         // Add the text to the collected output.
         sortOutput->AppendFormat( "\n[{0}] {1}",
            numOutputLines.ToString(), outLine->Data );
      }
   }
};
継承階層継承階層
System.Object
   System.EventArgs
    System.Diagnostics.DataReceivedEventArgs
スレッド セーフスレッド セーフ
この型の public static (Visual Basic では Shared) メンバはすべて、スレッド セーフです。インスタンス メンバ場合は、スレッド セーフであるとは限りません。
プラットフォームプラットフォーム
バージョン情報バージョン情報
参照参照
関連項目
DataReceivedEventArgs メンバ
System.Diagnostics 名前空間
DataReceivedEventHandler
Process.OutputDataReceived
Process.ErrorDataReceived
System.Diagnostics.Process

DataReceivedEventArgs プロパティ


パブリック プロパティパブリック プロパティ

参照参照

関連項目

DataReceivedEventArgs クラス
System.Diagnostics 名前空間
DataReceivedEventHandler
Process.OutputDataReceived
Process.ErrorDataReceived
System.Diagnostics.Process

DataReceivedEventArgs メソッド


DataReceivedEventArgs メンバ

OutputDataReceived イベントと ErrorDataReceived イベントデータ提供します

DataReceivedEventArgs データ型公開されるメンバを以下の表に示します


パブリック プロパティパブリック プロパティ
パブリック メソッドパブリック メソッド
プロテクト メソッドプロテクト メソッド
参照参照

関連項目

DataReceivedEventArgs クラス
System.Diagnostics 名前空間
DataReceivedEventHandler
Process.OutputDataReceived
Process.ErrorDataReceived
System.Diagnostics.Process



英和和英テキスト翻訳>> Weblio翻訳
英語⇒日本語日本語⇒英語
  

辞書ショートカット

すべての辞書の索引

「DataReceivedEventArgs」の関連用語

DataReceivedEventArgsのお隣キーワード
検索ランキング

   

英語⇒日本語
日本語⇒英語
   



DataReceivedEventArgsのページの著作権
Weblio 辞書 情報提供元は 参加元一覧 にて確認できます。

   
日本マイクロソフト株式会社日本マイクロソフト株式会社
© 2024 Microsoft.All rights reserved.

©2024 GRAS Group, Inc.RSS