writing to a config file

Hello,

I copied this code from MS web site trying to add a new key to current config file, but it does not save the config file at all when my app exits, any idea?

    // Open App.Config of executable
                System.Configuration.Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);

                config.AppSettings.Settings.Add("TestKey", "gdhgasdkjadhsj");
                // Save the configuration file.
                config.Save(ConfigurationSaveMode.Full);

How could this code have no exceptions whatsoever but just not doing what Microsoft claim it should do -- save the damn config file?

This MSDN example worked for me:

using System;
using System.Collections.Specialized;
using System.Collections.ObjectModel;
using System.Collections;
using System.Text;
using System.Configuration;

namespace ConsoleApplication2
{
    class Program
    {
        static void Main(string[] args)
        {
            System.Configuration.Configuration config =
              ConfigurationManager.OpenExeConfiguration(
              ConfigurationUserLevel.None);

            // Add an entry to appSettings.
            int appStgCnt =
                ConfigurationManager.AppSettings.Count;
            string newKey = "NewKey" + appStgCnt.ToString();

            string newValue = DateTime.Now.ToLongDateString() + " " +
                           DateTime.Now.ToLongTimeString();

            config.AppSettings.Settings.Add(newKey, newValue);

            // Save the configuration file.
            config.Save(ConfigurationSaveMode.Modified);

            // Force a reload of the changed section.
            ConfigurationManager.RefreshSection("appSettings");

        }
    }
}

Since the app is named "ConsoleApplication2.exe", the config file that it's saving to is "ConsoleApplication2.exe.Config", not "App.config".

1 Reply

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Guest User18y ago
This MSDN example worked for me:

using System;
using System.Collections.Specialized;
using System.Collections.ObjectModel;
using System.Collections;
using System.Text;
using System.Configuration;

namespace ConsoleApplication2
{
    class Program
    {
        static void Main(string[] args)
        {
            System.Configuration.Configuration config =
              ConfigurationManager.OpenExeConfiguration(
              ConfigurationUserLevel.None);

            // Add an entry to appSettings.
            int appStgCnt =
                ConfigurationManager.AppSettings.Count;
            string newKey = "NewKey" + appStgCnt.ToString();

            string newValue = DateTime.Now.ToLongDateString() + " " +
                           DateTime.Now.ToLongTimeString();

            config.AppSettings.Settings.Add(newKey, newValue);

            // Save the configuration file.
            config.Save(ConfigurationSaveMode.Modified);

            // Force a reload of the changed section.
            ConfigurationManager.RefreshSection("appSettings");

        }
    }
}

Since the app is named "ConsoleApplication2.exe", the config file that it's saving to is "ConsoleApplication2.exe.Config", not "App.config".