Question

I currently have two different event handlers in C#, which perform two different functions. Although how could I combine the two methods together, so only 1 button could perform both actions? (Taking into account that button1_Click event must be performed first.)

    private void button2_Click(object sender, EventArgs e)
    {
        var file = File.AppendText(@"c:\output2.txt");

        foreach (string tmpLine in File.ReadAllLines(@"c:\output.txt"))
        {
            if (File.Exists(tmpLine))
            {
                file.WriteLine(tmpLine);
            }
        }

        file.Close();

    }

    private void button1_Click(object sender, EventArgs e)
    {
        using (StreamWriter sw = File.AppendText(@"c:\output.txt"))
        {
            StreamReader sr = new StreamReader(@"c:\filename.txt");

            string myString = "";
            while (!sr.EndOfStream)
            {

                myString = sr.ReadLine();
                int index = myString.LastIndexOf(":");
                if (index > 0)
                    myString = myString.Substring(0, index);

                sw.WriteLine(myString);
            }
            button2_Click(sender, e);

        }

    }

Answer 1

Instead of writing the code in the event handler, bring them out into two functions and then call those functions whichever way you want from the event handler.