Question

Is there any possible way to automatically append all strings/etc to a textbox(or other form) of my choice? Right now in-order to do that in any class outside of the Main class, I have to route it into it and then use the Main class to post it.

Clarification(CHANGED):
I am no longer looking to just handle exceptions. I really just want to pass a string/text from anywhere in my program without having to pass it to the MainWindow.

namespace MyProgram 
{
    public partial class MainWindow : Window
    {
        Main goes here...
    }

}

namespace People 
{
    public class Worker
    {
        public void printToLog()
        {
            textBoxErrorlog.AppendText("Message....");
        }
    } 
}

The code above won’t work. I would have to return the string to the MainWindow class and append it from there (bc textBoxErrorlog doesn’t exist in Worker). I would like to skip that step and just post it from the Worker class.

Answer 1

Your question is pretty vague. But I have a feeling you’ll find these events interesting/useful:

Application.ThreadException
AppDomain.CurrentDomain.UnhandledException

EDIT after your added code:

Generally speaking it’s bad to catch Exception. In your case I would recommend hooking into AppDomain.CurrentDomain.UnhandledException and in that handler append to the MainWindow’s exception log textbox.

    AppDomain.CurrentDomain.UnhandledException += new UnhandledExceptionEventHandler(CurrentDomain_UnhandledException);
    void CurrentDomain_UnhandledException(object sender, UnhandledExceptionEventArgs e)
    {
        if (!e.IsTerminating)
        {
            MainWindow mw = GetRefToTheMainWindowSomehow();
            mw.AppendException(e.ExceptionObject);
        }
    }

And in MainWindow:

    internal delegate void AppendExceptionDelegate(Exception e);

    public void AppendException(Exception e)
    {
        if (this.InvokeRequired)
        {
            this.Invoke(new AppendExceptionDelegate(AppendException), new[] { e });
        }
        else
        {
            this._textBox.Text += e.Message;
        }
    }