Console.SetError(TextWriter) Méthode

  • Référence

Définition

Espace de noms:
System
Assembly:
System.Console.dll
Assembly:
mscorlib.dll
Assembly:
netstandard.dll
Source:
Console.cs
Source:
Console.cs
Source:
Console.cs

Définit la propriété Error avec l'objet TextWriter spécifié.

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)

Paramètres

newError
TextWriter

Flux représentant la nouvelle sortie d'erreur standard.

Exceptions

ArgumentNullException

newError a la valeur null.

SecurityException

L'appelant n'a pas l'autorisation requise.

Exemples

L’exemple suivant montre comment rediriger le flux d’erreurs standard vers un fichier.

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

Remarques

Par défaut, la Error propriété est définie sur le flux de sortie d’erreur standard.

qui StreamWriter encapsule un FileStream peut être utilisé pour envoyer des messages d’erreur à un fichier.

S’applique à

Voir aussi