Question

Well, first of all my code :

protected void Button2_Click1(object sender, EventArgs e)
{
    string batname = edit.SelectedValue;
    StreamWriter sw = new StreamWriter("D:\\MPSite-Serv\\bats\\" + batname);

    string theedit = batedit.Text;
    sw.WriteLine(theedit);
    sw.Flush();
}

When I click on button2 and try to write all of the text into the bat file, I get this result the bat file contains:

System.Web.UI.WebControls.TextBox

Why is that?

I am using all of the following statements, if it helps:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.IO;
using System.Diagnostics;

Answer 1

http://msdn.microsoft.com/en-us/library/system.io.streamwriter.aspx#Y2863

The problem is simple: sw.writeline expects a string. You are sending it a text object which gets turned into the aformentioned .ToString(); which means your line gets translated, loosely, into

sw.WriteLine(theedit.ToString());

if you look at the documentation for WebControls.TextBox… scroll down the list to the Method ToString()

http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.textbox.aspx

What you need to do… is give it one string at a time (although I assume you could just give it the raw string from the textbox):

    using System.IO;

    namespace String_Writer
    {
        class Program
        {
            static void Main(string[] args)
            {
                string batname = "test.txt";
                string theedit = "Testing one two three four\n\nfive six seven eight.";
                using(StreamWriter sw = File.CreateText("C:\\Users\\Kriis\\Desktop\\" + batname))
                {
                    using (StringReader reader = new StringReader(theedit))
                    {
                        string line = string.Empty;
                        do
                        {
                            line = reader.ReadLine();
                            if (line != null)
                            {
                                sw.WriteLine(line);
                            }

                        } while (line != null);
                    }
                }
            }
        }
    }