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Console.OpenStandardOutput Method (Int32)

.NET Framework 1.1

Acquires the standard output stream, set to a specified buffer size.

[Visual Basic]
Overloads Public Shared Function OpenStandardOutput( _
   ByVal bufferSize As Integer _
) As Stream
[C#]
public static Stream OpenStandardOutput(
 int bufferSize
);
[C++]
public: static Stream* OpenStandardOutput(
 int bufferSize
);
[JScript]
public static function OpenStandardOutput(
   bufferSize : int
) : Stream;

Parameters

bufferSize
The internal stream buffer size.

Return Value

The standard output stream.

Exceptions

Exception Type Condition
ArgumentOutOfRangeException bufferSize is less than or equal to zero.

Remarks

This method can be used to reacquire the standard output stream after it has been changed by the SetOut method.

Example

The following code sample illustrates the use of OpenStandardOutput:

[Visual Basic] 
Public Class InsertTabs
   Private Const tabSize As Integer = 4
   Private Const usageText As String = "Usage: INSERTTABS 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
      
      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 line As String
      line = Console.ReadLine()
      While Not line Is Nothing
         Dim newLine As String = line.Replace("".PadRight(tabSize, " "c), ControlChars.Tab)
         Console.WriteLine(newLine)
         line = Console.ReadLine()
      End While
      writer.Close()
      ' Recover the standard output stream so that a 
      ' completion message can be displayed.
      Dim standardOutput As New StreamWriter(Console.OpenStandardOutput())
      standardOutput.AutoFlush = True
      Console.SetOut(standardOutput)
      Console.WriteLine("INSERTTABS has completed the processing of {0}.", args(0))
      Return 0
   End Function 'Main
End Class 'InsertTabs

[C#] 
public class InsertTabs {
    private const int tabSize = 4;
    private const string usageText = "Usage: INSERTTABS inputfile.txt outputfile.txt";
    public static int Main(string[] args) {
        StreamWriter writer = null;

        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;            
        }
        string line;
        while ((line = Console.ReadLine()) != null) {
            string newLine = line.Replace(("").PadRight(tabSize, ' '), "\t");
            Console.WriteLine(newLine);
        }
        writer.Close();
        // Recover the standard output stream so that a 
        // completion message can be displayed.
        StreamWriter standardOutput = new StreamWriter(Console.OpenStandardOutput());
        standardOutput.AutoFlush = true;
        Console.SetOut(standardOutput);
        Console.WriteLine("INSERTTABS has completed the processing of {0}.", args[0]);
        return 0;
    }
}

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

    StreamWriter* writer = 0;

    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;            
    }
    String* line;
    while ((line = Console::ReadLine()) != 0) {
        String* newLine = line->Replace((S"")->PadRight(tabSize, ' '), S"\t");
        Console::WriteLine(newLine);
    }
    writer->Close();
    // Recover the standard output stream so that a 
    // completion message can be displayed.
    StreamWriter* standardOutput = new StreamWriter(Console::OpenStandardOutput());
    standardOutput->AutoFlush = true;
    Console::SetOut(standardOutput);
    Console::WriteLine(S"INSERTTABS has completed the processing of {0}.", args[1]);
    return 0;
}

[JScript] 
const tabSize = 4;
const usageText = "Usage: INSERTTABS inputfile.txt outputfile.txt";

var writer : StreamWriter = null;
var args = Environment.GetCommandLineArgs();

if (args.Length != 3) {
    Console.WriteLine(usageText);
    Environment.Exit(1);
}

try {
    writer = new StreamWriter(args[2]);
    Console.SetOut(writer);
    Console.SetIn(new StreamReader(args[1]));
}
catch(e : IOException) {
    var errorWriter = Console.Error;
    errorWriter.WriteLine(e.Message);
    errorWriter.WriteLine(usageText);
    Environment.Exit(1);            
}
var line;
while ((line = Console.ReadLine()) != null) {
    var newLine = line.Replace(("").PadRight(tabSize, ' '), "\t");
    Console.WriteLine(newLine);
}
writer.Close();
// Recover the standard output stream so that a 
// completion message can be displayed.
var standardOutput = new StreamWriter(Console.OpenStandardOutput());
standardOutput.AutoFlush = true;
Console.SetOut(standardOutput);
Console.WriteLine("INSERTTABS has completed the processing of {0}.", args[0]);

Requirements

Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family, Common Language Infrastructure (CLI) Standard

See Also

Console Class | Console Members | System Namespace | Console.OpenStandardOutput Overload List | Out | SetOut

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