How to view file path in textbox after saving....

[compulove]

I created a browse button and it will allow the user to either open or save a file to their directory, but the problem I am having is how to be able to view the path location in a textbox so the user can see where they saved it...

here is what I have so far:

string FilePath = "C:/Users/oZ012D/My Documents/ExporterOutput.txt";
            if (!File.Exists(FilePath))
            {
                using (StreamWriter sw = File.CreateText(FilePath))
                {
                    sw.WriteLine("Hello");
                    sw.WriteLine("And");
                    sw.WriteLine("Welcome");
                }
                Response.Write("Success!");
            }
            using (StreamReader sr = File.OpenText(FilePath))
            {
                string s = "";
                while ((s = sr.ReadLine()) != null)
                {
                    Console.WriteLine(s);
                }
            }

This looks like it should work but it doesn't...if someone could send me in the right direction or fix my code that would be great!

Thank you!