我有一个外部的dll C＃编写的，我从它使用的写入调试信息到控制台的组件文件学习 Console.WriteLine 。

I have an external dll written in C# and I studied from the assemblies documentation that it writes its debug messages to the Console using Console.WriteLine.

此DLL写我的应用程序的UI交互期间安慰，所以我不作DLL直接调用，但我会捕获所有控制台输出，所以我想我并初始化的形式加载，然后获取捕获的文本后。

this DLL writes to console during my interaction with the UI of the Application, so i don't make DLL calls directly, but i would capture all console output , so i think i got to intialize in form load , then get that captured text later.

我想所有的输出重定向到一个字符串变量。

I would like to redirect all the output to a string variable.

我试过 Console.SetOut ，但其使用重定向到字符串是不容易的。

I tried Console.SetOut, but its use to redirect to string is not easy.

推荐答案

由于好像要赶在实时控制台输出，我想通了，你可以创建自己的的TextWriter 实现，触发一个事件，每当一个写或的WriteLine 发生在控制台。

As it seems like you want to catch the Console output in realtime, I figured out that you might create your own TextWriter implementation that fires an event whenever a Write or WriteLine happens on the Console.

笔者是这样的：

    public class ConsoleWriterEventArgs : EventArgs
    {
        public string Value { get; private set; }
        public ConsoleWriterEventArgs(string value)
        {
            Value = value;
        }
    }

    public class ConsoleWriter : TextWriter
    {
        public override Encoding Encoding { get { return Encoding.UTF8; } }

        public override void Write(string value)
        {
            if (WriteEvent != null) WriteEvent(this, new ConsoleWriterEventArgs(value));
            base.Write(value);
        }

        public override void WriteLine(string value)
        {
            if (WriteLineEvent != null) WriteLineEvent(this, new ConsoleWriterEventArgs(value));
            base.WriteLine(value);
        }

        public event EventHandler<ConsoleWriterEventArgs> WriteEvent;
        public event EventHandler<ConsoleWriterEventArgs> WriteLineEvent;
    }

如果这是一个WinForm的应用程序，你可以设置的作家和消耗其在Program.cs的事件是这样的：

If it's a WinForm app, you can setup the writer and consume its events in the Program.cs like this:

    /// <summary>
    /// The main entry point for the application.
    /// </summary>
    [STAThread]
    static void Main()
    {
        using (var consoleWriter = new ConsoleWriter())
        {
            consoleWriter.WriteEvent += consoleWriter_WriteEvent;
            consoleWriter.WriteLineEvent += consoleWriter_WriteLineEvent;

            Console.SetOut(consoleWriter);
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new Form1());
        }
    }

    static void consoleWriter_WriteLineEvent(object sender, Program.ConsoleWriterEventArgs e)
    {
        MessageBox.Show(e.Value, "WriteLine");
    }

    static void consoleWriter_WriteEvent(object sender, Program.ConsoleWriterEventArgs e)
    {
        MessageBox.Show(e.Value, "Write");
    }