Console.SetError(TextWriter) Metoda

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Definice

Obor názvů:
System
Sestavení:
System.Console.dll
Sestavení:
netstandard.dll
Sestavení:
mscorlib.dll

Nastaví Error vlastnost na zadaný TextWriter objekt.

public:
 static void SetError(System::IO::TextWriter ^ newError);
public static void SetError (System.IO.TextWriter newError);
static member SetError : System.IO.TextWriter -> unit
Public Shared Sub SetError (newError As TextWriter)

Parametry

newError
TextWriter

Datový proud, který je novým standardním chybový výstupem.

Výjimky

ArgumentNullException

newError je null.

SecurityException

Volající nemá požadované oprávnění.

Příklady

Následující příklad ukazuje, jak přesměrovat standardní chybový stream do souboru.

using namespace System;
using namespace System::IO;
using namespace System::Reflection;

ref class RedirectStdErr;

void main()
{
   // Define file to receive error stream.
   DateTime appStart = DateTime::Now;
   String^ fn = "c:\\temp\\errlog" + appStart.ToString("yyyyMMddHHmm") + ".log";
   TextWriter^ errStream = gcnew StreamWriter(fn);
   String^ appName = Assembly::GetExecutingAssembly()->Location;
   appName = appName->Substring(appName->LastIndexOf('\\') + 1);
   // Redirect standard error stream to file.
   Console::SetError(errStream);
   // Write file header.
   Console::Error->WriteLine("Error Log for Application {0}", appName);
   Console::Error->WriteLine();
   Console::Error->WriteLine("Application started at {0}.", appStart);
   Console::Error->WriteLine();
   //
   // Application code along with error output 
   //
   // Close redirected error stream.
   Console::Error->Close();
}

using System;
using System.IO;
using System.Reflection;

public class RedirectStdErr
{
   public static void Main()
   {
      // Define file to receive error stream.
      DateTime appStart = DateTime.Now;
      string fn = @"c:\temp\errlog" + appStart.ToString("yyyyMMddHHmm") + ".log";
      TextWriter errStream = new StreamWriter(fn);
      string appName = typeof(RedirectStdErr).Assembly.Location;
      appName = appName.Substring(appName.LastIndexOf('\\') + 1);
      // Redirect standard error stream to file.
      Console.SetError(errStream);
      // Write file header.
      Console.Error.WriteLine("Error Log for Application {0}", appName);
      Console.Error.WriteLine();
      Console.Error.WriteLine("Application started at {0}.", appStart);
      Console.Error.WriteLine();
      //
      // Application code along with error output
      //
      // Close redirected error stream.
      Console.Error.Close();
   }
}

open System
open System.IO
open System.Reflection

[<EntryPoint>]
let main _ =
    // Define file to receive error stream.
    let appStart = DateTime.Now
    let fn = @"C:\temp\errlog" + appStart.ToString "yyyyMMddHHmm" + ".log"
    use fs = new FileStream(fn, FileMode.OpenOrCreate)
    let errStream = new StreamWriter(fs)
    let appName = 
        let appName = Assembly.GetExecutingAssembly().Location
        appName.Substring(appName.LastIndexOf('\\') + 1)

    // Redirect standard error stream to file.
    Console.SetError errStream

    // Write file header.
    Console.Error.WriteLine $"Error Log for Application {appName}"
    Console.Error.WriteLine()
    Console.Error.WriteLine $"Application started at {appStart}."
    Console.Error.WriteLine()
    //
    // Application code along with error output
    //
    // Close redirected error stream.
    Console.Error.Close()
    
    0

Imports System.IO
Imports System.Reflection

Module RedirectStdErr
   Public Sub Main()
      ' Define file to receive error stream.
      Dim appStart As Date = Date.Now
      Dim fn As String = "c:\temp\errlog" & appStart.ToString("yyyyMMddHHmm") & ".log"
      Dim errStream As New StreamWriter(fn)
      Dim appName As String = GetType(RedirectStdErr).Assembly.Location
      appName = Mid(appName, InStrRev(appName, "\") + 1)
      ' Redirect standard error stream to file.
      Console.SetError(errStream)
      ' Write file header.
      Console.Error.WriteLine("Error Log for Application {0}", appName)
      Console.Error.WriteLine()
      Console.Error.WriteLine("Application started at {0}.", appStart)
      Console.Error.WriteLine()
      '
      ' Application code along with error output 
      '
      ' Close redirected error stream.
      Console.Error.Close()
   End Sub
End Module

Poznámky

Ve výchozím nastavení je Error vlastnost nastavená na standardní chybový výstupní datový proud.

Objekt StreamWriter , který zapouzdřuje , lze použít k FileStream odeslání chybových zpráv do souboru.

Platí pro

Viz také