ConfigurationManager not saving value in app.config

Question

I have this statement, that's supposed to set the value of a key in my config:

ConfigurationManager.AppSettings["Volume"] = volumeNumSlider.Value.ToString();

But it does not save the value when I relaunch the application.

This is my app.config:

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
   <appSettings>
       <add key="Volume" value="7"/>
       <add key="Keyval" value="Z"/>
   </appSettings>
</configuration>

Ehsan Sajjad · Accepted Answer · 2016-04-01T17:40:43.230

6

That will not update it, you have save the changes back to config file following way:

Configuration configuration = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
configuration.AppSettings.Settings["Volume"].Value = volumeNumSlider.Value.ToString();
configuration.Save(ConfigurationSaveMode.Modified);

ConfigurationManager.RefreshSection("appSettings");

edited Apr 01 '16 at 17:40

answered Apr 01 '16 at 13:47

Ehsan Sajjad

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Alright, I'm trying that, but I get this error:http://puu.sh/o23d2/68a147e335.jpg – dvs Apr 01 '16 at 13:54
you have to set the ``Value`` property – Ehsan Sajjad Apr 01 '16 at 13:58
``Settings["Volume"].Value`` – Ehsan Sajjad Apr 01 '16 at 13:59
Alright that worked, thanks a bunch! – dvs Apr 01 '16 at 13:59

ConfigurationManager not saving value in app.config

1 Answers1