重定向控制台。写入特定程序集

Question

In my C# application I am loading another assembly via reflection.

This other assembly writes to the console with the Console.Write functions.

I would like to redirect the output to a log4net appender for this specific assembly only. I would like all other assemblies to continue to output to the console.

How can I achieve this?

Answer 1

1. Console class has static method SetOut , which redirects output to StreamWriter object.

2. Write your own StreamWriter extension class to redirect console output if assembly the same as you want. Just for exmple.

   public class Writer : StreamWriter { private readonly Assembly _assembly;

    private readonly StreamWriter _stdout; public Writer(Assembly assembly) : base(Console.OpenStandardOutput()) { _assembly = assembly; _stdout = new StreamWriter(Console.OpenStandardOutput()); } public override void Write(string value) { var st = new StackTrace(); var curent = st.GetFrames(); foreach (var frame in curent) { if (frame.GetMethod().Module.Assembly == _assembly) { _stdout.Write("Redirected: " + value); _stdout.Flush(); return; } } base.Write(value); this.Flush(); } 

   }

Threre may be some occasions, such as one assembly calls method, that writes to console from another assembly. I don't know how to predict this behavior.