VAGSuite.frmPartnumberLookup.GetFileToOpen C# (CSharp) Method

        public string GetFileToOpen()
        {
            string retval = string.Empty;
            if (buttonEdit1.Text != string.Empty)
            {
                if (System.IO.File.Exists(Path.Combine(Application.StartupPath, "Binaries\\" + buttonEdit1.Text + ".BIN")))
                {
                    retval = Path.Combine(Application.StartupPath, "Binaries\\" + buttonEdit1.Text + ".BIN");
                }
            }
            return retval;
        }

        private void btnLookupPartnumber_ItemClick(object sender, ItemClickEventArgs e)
        {
            frmPartnumberLookup lookup = new frmPartnumberLookup();
            lookup.ShowDialog();
            if (lookup.Open_File)
            {
                string filename = lookup.GetFileToOpen();
                if (filename != string.Empty)
                {
                    CloseProject();
                    m_appSettings.Lastprojectname = "";
                    OpenFile(filename, true);
                    m_appSettings.LastOpenedType = 0;

                }
            }
            else if (lookup.Compare_File)
            {
                string filename = lookup.GetFileToOpen();
                if (filename != string.Empty)
                {

                    CompareToFile(filename);
                }
            }
            else if (lookup.CreateNewFile)
            {
                string filename = lookup.GetFileToOpen();
                if (filename != string.Empty)
                {
                    CloseProject();
                    m_appSettings.Lastprojectname = "";
                    File.Copy(filename, lookup.FileNameToSave);
                    OpenFile(lookup.FileNameToSave, true);
                    m_appSettings.LastOpenedType = 0;

                }
            }
        }