C# Application : modify a cs configuration file

Question

Hello, 

In my C# application I have a cs file which containing my ftp parameters : 

class FtpConfig
      {
          public string ServerAdress  = "10.10.100.100";
          public string UserName = UserName = "usertest";
          public string PathFolder = PathFolder = "/test/testfolder";
          public string Password = Password = "aaaaa"; 
       }

But in my app, I need to edit the configuration of the ftp (if it changes).

How can I edit this file and save it as the new configuration file ?

Ty ! 

Answer 1

Hi gauthiermt,

You can use App.config file in you app to holding your FTP information and encrypt sensitive data like User Name and Password I have added save as dialog to save as text file.
hope this way help you.

app.config

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    

  <appSettings>
    <add key="ServerAdress" value="0.10.100.100" />
    <add key="UserName" value="usertest" />
    <add key="PathFolder" value="/test/testfolder" />
    <add key="Password" value="aaaaa" />
  </appSettings>





</configuration>

C# code in a windows from

using System;
using System.Windows.Forms;
using System.Configuration;
using System.IO;
namespace WindowsFormsApp1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();

             
            txtserver.Text = ConfigurationManager.AppSettings["ServerAdress"];
            txtusername.Text = ConfigurationManager.AppSettings["UserName"];
            txtpathfolder.Text = ConfigurationManager.AppSettings["PathFolder"];
            txtpassword.Text = ConfigurationManager.AppSettings["Password"];



        }

        private void btnsave_Click(object sender, EventArgs e)
        {
             
            Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
             
            config.AppSettings.Settings["ServerAdress"].Value = txtserver.Text;
            config.AppSettings.Settings["UserName"].Value = txtusername.Text;
            config.AppSettings.Settings["PathFolder"].Value = txtpathfolder.Text;
            config.AppSettings.Settings["Password"].Value = txtpassword.Text;


            config.Save(ConfigurationSaveMode.Modified);

            ConfigurationManager.RefreshSection("appSettings");


            txtserver.Text = ConfigurationManager.AppSettings["ServerAdress"];
            txtusername.Text = ConfigurationManager.AppSettings["UserName"];
            txtpathfolder.Text = ConfigurationManager.AppSettings["PathFolder"];
            txtpassword.Text = ConfigurationManager.AppSettings["Password"];



        }

        private void btnsaveas_Click(object sender, EventArgs e)
        {
            SaveFileDialog save = new SaveFileDialog();

            save.FileName = "ftp.txt";

            save.Filter = "Text File | *.txt";

            if (save.ShowDialog() == DialogResult.OK)
 
            {
                 
                StreamWriter writer = new StreamWriter(save.OpenFile());
  
                foreach (string key in ConfigurationManager.AppSettings)
                {
                    string value = ConfigurationManager.AppSettings[key];
                    writer.WriteLine("{0}  :  {1}", key, value);
                }
                 
                writer.Dispose();

                writer.Close();

            }
        }
    }
}

---

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Answer 2

You should learn how to use a class with public auto properties.

https://docs.microsoft.com/en-us/dotnet/csharp/programming-guide/classes-and-structs/auto-implemented-properties

You can then XML serialize the object saving it to a file.

https://docs.microsoft.com/en-us/dotnet/csharp/programming-guide/concepts/serialization/how-to-read-object-data-from-an-xml-file

You can make a change to the data in the XML file that represents the class/object.

You can read the XML file and deserialize it back to an object.