Console.Error プロパティ

標準エラー出力ストリームを取得します。

Public Shared ReadOnly Property Error As TextWriter
[C#]
public static TextWriter Error {get;}
[C++]
public: __property static TextWriter* get_Error();
[JScript]
public static function get Error() : TextWriter;

プロパティ値

標準エラー出力ストリームを表す TextWriter オブジェクト。

解説

既定では、このプロパティは標準エラー ストリームに設定されます。このプロパティは、 SetError メソッドで別のストリームに設定できます。

使用例

Error の使用方法については、次のコード例を参照してください。

 
Public Class ExpandTabs
   Private Const tabSize As Integer = 4
   Private Const usageText As String = "Usage: EXPANDTABSEX inputfile.txt outputfile.txt"
   
   'Entry point which delegates to C-style main Private Function
   Public Overloads Shared Sub Main()
      System.Environment.ExitCode = Main(System.Environment.GetCommandLineArgs())
   End Sub
   
   Overloads Public Shared Function Main(args() As String) As Integer
      Dim writer As StreamWriter = Nothing
      Dim standardOutput As TextWriter = Console.Out
      
      If args.Length < 3 Then
         Console.WriteLine(usageText)
         Return 1
      End If
      
      Try
         writer = New StreamWriter(args(2))
         Console.SetOut(writer)
         Console.SetIn(New StreamReader(args(1)))
      Catch e As IOException
         Dim errorWriter As TextWriter = Console.Error
         errorWriter.WriteLine(e.Message)
         errorWriter.WriteLine(usageText)
         Return 1
      End Try
      Dim i As Integer
      i = Console.Read()
      While i <> -1 
         Dim c As Char = Convert.ToChar(i)
         If c = ControlChars.Tab Then
            Console.Write("".PadRight(tabSize, " "c))
         Else
            Console.Write(c)
         End If
         i = Console.Read()
      End While
      writer.Close()
      ' Recover the standard output stream so that a 
      ' completion message can be displayed.
      Console.SetOut(standardOutput)
      Console.WriteLine("EXPANDTABSEX has completed the processing of {0}.", args(0))
      Return 0
   End Function 'Main
End Class 'ExpandTabs

[C#] 
public class ExpandTabs {
    private const int tabSize = 4;
    private const string usageText = "Usage: EXPANDTABSEX inputfile.txt outputfile.txt";
    public static int Main(string[] args) {
        StreamWriter writer = null;
        TextWriter standardOutput = Console.Out;

        if (args.Length < 2) {
            Console.WriteLine(usageText);
            return 1;
        }

        try {
            writer = new StreamWriter(args[1]);
            Console.SetOut(writer);
            Console.SetIn(new StreamReader(args[0]));
        }
        catch(IOException e) {
            TextWriter errorWriter = Console.Error;
            errorWriter.WriteLine(e.Message);
            errorWriter.WriteLine(usageText);
            return 1;            
        }
        int i;
        while ((i = Console.Read()) != -1) {
            char c = (char)i;
            if (c == '\t')
                Console.Write(("").PadRight(tabSize, ' '));
            else
                Console.Write(c);
        }
        writer.Close();
        // Recover the standard output stream so that a 
        // completion message can be displayed.
        Console.SetOut(standardOutput);
        Console.WriteLine("EXPANDTABSEX has completed the processing of {0}.", args[0]);
        return 0;
    }
}

[C++] 
int main() {
   const int tabSize = 4;
   String* args[] = Environment::GetCommandLineArgs();
   String* usageText = S"Usage: EXPANDTABSEX inputfile.txt outputfile.txt";

   StreamWriter* writer = 0;
   TextWriter* standardOutput = Console::Out;

   if (args->Length < 3) {
      Console::WriteLine(usageText);
      return 1;
   }

   try {
      writer = new StreamWriter(args[2]);
      Console::SetOut(writer);
      Console::SetIn(new StreamReader(args[1]));
   }
   catch(IOException* e) {
      TextWriter* errorWriter = Console::Error;
      errorWriter->WriteLine(e->Message);
      errorWriter->WriteLine(usageText);
      return 1;            
   }
   int i;
   while ((i = Console::Read()) != -1) {
      Char c = (Char)i;
      if (c == '\t')
         Console::Write((S"")->PadRight(tabSize, ' '));
      else
         Console::Write(c);
   }
   writer->Close();
   // Recover the standard output stream so that a 
   // completion message can be displayed.
   Console::SetOut(standardOutput);
   Console::WriteLine(S"EXPANDTABSEX has completed the processing of {0}.", args[0]);
   return 0;
}

[JScript] 
public class ExpandTabs {
    private static var tabSize : int = 4;
    private static var usageText : String  = "Usage: EXPANDTABSEX inputfile.txt outputfile.txt";
    public static function Main(args : String[]) : int {
        var writer : StreamWriter = null;
        var standardOutput : TextWriter = Console.Out;

        if (args.Length < 2) {
            Console.WriteLine(usageText);
            return 1;
        }

        try {
            writer = new StreamWriter(args[1]);
            Console.SetOut(writer);
            Console.SetIn(new StreamReader(args[0]));
        }
        catch(e : IOException) {
            var errorWriter : TextWriter = Console.Error;
            errorWriter.WriteLine(e.Message);
            errorWriter.WriteLine(usageText);
            return 1;            
        }
        var i : int;
        while ((i = Console.Read()) != -1) {
            var c : char = char(i);
            if (c == '\t')
                Console.Write(("").PadRight(tabSize, ' '));
            else
                Console.Write(c);
        }
        writer.Close();
        // Recover the standard output stream so that a 
        // completion message can be displayed.
        Console.SetOut(standardOutput);
        Console.WriteLine("EXPANDTABSEX has completed the processing of {0}.", args[0]);
        return 0;
    }
}

必要条件

プラットフォーム: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 ファミリ, Common Language Infrastructure (CLI) Standard

参照

Console クラス | Console メンバ | System 名前空間 | In | Out | SetError