如何将 Console.WriteLine 输出保存到文本文件

Question

我有一个程序可以将各种结果输出到命令行控制台。

如何使用StreamReader或其他技术将输出保存到文本文件？

System.Collections.Generic.IEnumerable<String> lines = File.ReadAllLines(@"C:\Test\ntfs8.txt");

foreach (String r in lines.Skip(1))
{
    String[] token = r.Split(',');
    String[] datetime = token[0].Split(' ');
    String timeText = datetime[4];
    String actions = token[2];
    Console.WriteLine("The time for this array is: " + timeText);
    Console.WriteLine(token[7]);
    Console.WriteLine(actions);
    MacActions(actions);
    x = 1;
    Console.WriteLine("================================================");
}

if (x == 2)
{
    Console.WriteLine("The selected time does not exist within the log files!");
}

System.IO.StreamReader reader = ;
string sRes = reader.ReadToEnd();
StreamWriter SW;
SW = File.CreateText("C:\\temp\\test.bodyfile");
SW.WriteLine(sRes);
SW.Close();
Console.WriteLine("File Created");
reader.Close();

Answer 1

试试这篇文章中的这个例子 - 演示将控制台输出重定向到一个文件

using System;
using System.IO;

static public void Main ()
{
    FileStream ostrm;
    StreamWriter writer;
    TextWriter oldOut = Console.Out;
    try
    {
        ostrm = new FileStream ("./Redirect.txt", FileMode.OpenOrCreate, FileAccess.Write);
        writer = new StreamWriter (ostrm);
    }
    catch (Exception e)
    {
        Console.WriteLine ("Cannot open Redirect.txt for writing");
        Console.WriteLine (e.Message);
        return;
    }
    Console.SetOut (writer);
    Console.WriteLine ("This is a line of text");
    Console.WriteLine ("Everything written to Console.Write() or");
    Console.WriteLine ("Console.WriteLine() will be written to a file");
    Console.SetOut (oldOut);
    writer.Close();
    ostrm.Close();
    Console.WriteLine ("Done");
}

Answer 2

试试这是否有效：

FileStream filestream = new FileStream("out.txt", FileMode.Create);
var streamwriter = new StreamWriter(filestream);
streamwriter.AutoFlush = true;
Console.SetOut(streamwriter);
Console.SetError(streamwriter);

Answer 3

对于这个问题：

如何将 Console.Writeline 输出保存到文本文件？

我会像其他人提到的那样使用Console.SetOut 。

---

但是，看起来您更像是在跟踪您的程序流程。 我会考虑使用Debug或Trace来跟踪程序状态。

它的工作方式类似于控制台，但您可以更好地控制您的输入，例如WriteLineIf 。

Debug仅在调试模式下运行，而Trace将在调试或发布模式下运行。

它们都允许诸如输出文件或控制台之类的侦听器。

TextWriterTraceListener tr1 = new TextWriterTraceListener(System.Console.Out);
Debug.Listeners.Add(tr1);

TextWriterTraceListener tr2 = new TextWriterTraceListener(System.IO.File.CreateText("Output.txt"));
Debug.Listeners.Add(tr2);

- http://support.microsoft.com/kb/815788

Answer 4

您是要为此编写代码还是仅使用命令行功能“命令重定向”，如下所示：

app.exe >> 输出.txt

如此处所示： http : //discomoose.org/2006/05/01/output-redirection-to-a-file-from-the-windows-command-line/ （存档在archive.org ）

编辑：链接失效，这是另一个例子： http : //pcsupport.about.com/od/commandlinereference/a/redirect-command-output-to-file.htm

Answer 5

创建一个类 Logger（代码如下），用 Logger.Out 替换 Console.WriteLine。 最后将字符串 Log 写入文件

public static class Logger
{        
     public static StringBuilder LogString = new StringBuilder(); 
     public static void Out(string str)
     {
         Console.WriteLine(str);
         LogString.Append(str).Append(Environment.NewLine);
     }
 }

Answer 6

根据 WhoIsNinja 的回答：

此代码将输出到控制台和日志字符串中，该字符串可以通过向文件附加行或覆盖来保存到文件中。

日志文件的默认名称是“Log.txt”并保存在应用程序路径下。

public static class Logger
{
    public static StringBuilder LogString = new StringBuilder();
    public static void WriteLine(string str)
    {
        Console.WriteLine(str);
        LogString.Append(str).Append(Environment.NewLine);
    }
    public static void Write(string str)
    {
        Console.Write(str);
        LogString.Append(str);

    }
    public static void SaveLog(bool Append = false, string Path = "./Log.txt")
    {
        if (LogString != null && LogString.Length > 0)
        {
            if (Append)
            {
                using (StreamWriter file = System.IO.File.AppendText(Path))
                {
                    file.Write(LogString.ToString());
                    file.Close();
                    file.Dispose();
                }
            }
            else
            {
                using (System.IO.StreamWriter file = new System.IO.StreamWriter(Path))
                {
                    file.Write(LogString.ToString());
                    file.Close();
                    file.Dispose();
                }
            }               
        }
    }
}

然后你可以像这样使用它：

Logger.WriteLine("==========================================================");
Logger.Write("Loading 'AttendPunch'".PadRight(35, '.'));
Logger.WriteLine("OK.");

Logger.SaveLog(true); //<- default 'false', 'true' Append the log to an existing file.

Answer 7

使用Console.SetOut重定向到TextWriter如下所述： http : //msdn.microsoft.com/en-us/library/system.console.setout.aspx

Answer 8

仅使用 app.config 中的配置：

    <system.diagnostics> 
        <trace autoflush="true" indentsize="4"> 
              <listeners> 

              <add name="consoleListener" type="System.Diagnostics.ConsoleTraceListener"/>

            <!--
            <add name="logListener" type="System.Diagnostics.TextWriterTraceListener" initializeData="TextWriterOutput.log" /> 
            <add name="EventLogListener" type="System.Diagnostics.EventLogTraceListener" initializeData="MyEventLog"/>
             -->

             <!--
              Remove the Default listener to avoid duplicate messages
              being sent to the debugger for display
             -->
             <remove name="Default" />

             </listeners> 
        </trace> 
  </system.diagnostics>

对于测试，您可以在运行程序之前使用DebugView ，然后我们可以轻松查看所有日志消息。

参考：
http://blogs.msdn.com/b/jjameson/archive/2009/06/18/configuring-logging-in-a-console-application.aspx http://www.thejoyofcode.com/from_zero_to_logging_with_system_diagnostics_in_15_minutes.aspx
将跟踪输出重定向到控制台
使用跟踪侦听器将调试输出重定向到文件的问题
https://ukadcdiagnostics.codeplex.com/
http://geekswithblogs.net/theunstablemind/archive/2009/09/09/adventures-in-system.diagnostics.aspx

Answer 9

死灵法术。
我通常只创建一个类，我可以在 IDisposable 中将 main 包裹起来。
因此，我可以将控制台输出记录到文件中，而无需修改其余代码。
这样，我在控制台和文本文件中都有输出供以后参考。

public class Program
{

    public static async System.Threading.Tasks.Task Main(string[] args)
    {
        using (ConsoleOutputMultiplexer co = new ConsoleOutputMultiplexer())
        {
            // Do something here
            System.Console.WriteLine("Hello Logfile and Console 1 !");
            System.Console.WriteLine("Hello Logfile and Console 2 !");
            System.Console.WriteLine("Hello Logfile and Console 3 !");
        } // End Using co 


        System.Console.WriteLine(" --- Press any key to continue --- ");
        System.Console.ReadKey();

        await System.Threading.Tasks.Task.CompletedTask;
    } // End Task Main 

}

和

public class MultiTextWriter
    : System.IO.TextWriter
{

    protected System.Text.Encoding m_encoding;
    protected System.Collections.Generic.IEnumerable<System.IO.TextWriter> m_writers;


    public override System.Text.Encoding Encoding => this.m_encoding;


    public override System.IFormatProvider FormatProvider
    {
        get
        {
            return base.FormatProvider;
        }
    }


    public MultiTextWriter(System.Collections.Generic.IEnumerable<System.IO.TextWriter> textWriters, System.Text.Encoding encoding)
    {
        this.m_writers = textWriters;
        this.m_encoding = encoding;
    }


    public MultiTextWriter(System.Collections.Generic.IEnumerable<System.IO.TextWriter> textWriters)
        : this(textWriters, textWriters.GetEnumerator().Current.Encoding)
    { }


    public MultiTextWriter(System.Text.Encoding enc, params System.IO.TextWriter[] textWriters)
        : this((System.Collections.Generic.IEnumerable<System.IO.TextWriter>)textWriters, enc)
    { }


    public MultiTextWriter(params System.IO.TextWriter[] textWriters)
        : this((System.Collections.Generic.IEnumerable<System.IO.TextWriter>)textWriters)
    { }


    public override void Flush()
    {
        foreach (System.IO.TextWriter thisWriter in this.m_writers)
        {
            thisWriter.Flush();
        }
    }

    public async override System.Threading.Tasks.Task FlushAsync()
    {
        foreach (System.IO.TextWriter thisWriter in this.m_writers)
        {
            await thisWriter.FlushAsync();
        }

        await System.Threading.Tasks.Task.CompletedTask;
    }


    public override void Write(char[] buffer, int index, int count)
    {
        foreach (System.IO.TextWriter thisWriter in this.m_writers)
        {
            thisWriter.Write(buffer, index, count);
        }
    }


    public override void Write(System.ReadOnlySpan<char> buffer)
    {
        foreach (System.IO.TextWriter thisWriter in this.m_writers)
        {
            thisWriter.Write(buffer);
        }
    }


    public async override System.Threading.Tasks.Task WriteAsync(char[] buffer, int index, int count)
    {
        foreach (System.IO.TextWriter thisWriter in this.m_writers)
        {
            await thisWriter.WriteAsync(buffer, index, count);
        }

        await System.Threading.Tasks.Task.CompletedTask;
    }


    public async override System.Threading.Tasks.Task WriteAsync(System.ReadOnlyMemory<char> buffer, System.Threading.CancellationToken cancellationToken = default)
    {
        foreach (System.IO.TextWriter thisWriter in this.m_writers)
        {
            await thisWriter.WriteAsync(buffer, cancellationToken);
        }

        await System.Threading.Tasks.Task.CompletedTask;
    }


    protected override void Dispose(bool disposing)
    {
        foreach (System.IO.TextWriter thisWriter in this.m_writers)
        {
            thisWriter.Dispose();
        }
    }


    public async override System.Threading.Tasks.ValueTask DisposeAsync()
    {
        foreach (System.IO.TextWriter thisWriter in this.m_writers)
        {
            await thisWriter.DisposeAsync();
        }

        await System.Threading.Tasks.Task.CompletedTask;
    }

    public override void Close()
    {

        foreach (System.IO.TextWriter thisWriter in this.m_writers)
        {
            thisWriter.Close();
        }
        
    } // End Sub Close 


} // End Class MultiTextWriter 



public class ConsoleOutputMultiplexer
    : System.IDisposable
{

    protected System.IO.TextWriter m_oldOut;
    protected System.IO.FileStream m_logStream;
    protected System.IO.StreamWriter m_logWriter;

    protected MultiTextWriter m_multiPlexer;


    public ConsoleOutputMultiplexer()
    {
        this.m_oldOut = System.Console.Out;

        try
        {
            this.m_logStream = new System.IO.FileStream("./Redirect.txt", System.IO.FileMode.OpenOrCreate, System.IO.FileAccess.Write);
            this.m_logWriter = new System.IO.StreamWriter(this.m_logStream);
            this.m_multiPlexer = new MultiTextWriter(this.m_oldOut.Encoding, this.m_oldOut, this.m_logWriter);

            System.Console.SetOut(this.m_multiPlexer);
        }
        catch (System.Exception e)
        {
            System.Console.WriteLine("Cannot open Redirect.txt for writing");
            System.Console.WriteLine(e.Message);
            return;
        }

    } // End Constructor 


    void System.IDisposable.Dispose()
    {
        System.Console.SetOut(this.m_oldOut);

        if (this.m_multiPlexer != null)
        {
            this.m_multiPlexer.Flush();
            if (this.m_logStream != null)
                this.m_logStream.Flush();

            this.m_multiPlexer.Close();
        }
        
        if(this.m_logStream != null)
            this.m_logStream.Close();
    } // End Sub Dispose 


} // End Class ConsoleOutputMultiplexer