Adding appSettings section to web.config through c# code

Question

I'm just reading the web.config file through this code as

Configuration configuration = WebConfigurationManager.OpenWebConfiguration("~");

AppSettingsSection appSettingsSection = (AppSettingsSection)configuration.GetSection("appSettings");

if (appSettingsSection != null)
{
         appSettingsSection.Settings.Remove(key);
         config.Save();
}

It works fine when appSettings is present in the web.config file.

My query is to add appSettings tag in web.config file if it is not present.

typically you would simply edit the config file. why are you trying to modify it problematically? — Jason Meckley
– Jason Meckley, Commented Dec 5, 2012 at 13:55

Gregor Primar · Accepted Answer · 2012-12-05 14:30:31Z

1

Here I am adding new application key "myKey" with value "myValue":

        System.Configuration.KeyValueConfigurationCollection settings;
        System.Configuration.Configuration config;

        System.Configuration.ExeConfigurationFileMap configFile = new System.Configuration.ExeConfigurationFileMap();
        configFile.ExeConfigFilename = "App.config";
        config = System.Configuration.ConfigurationManager.OpenMappedExeConfiguration(configFile, System.Configuration.ConfigurationUserLevel.None);
        settings = config.AppSettings.Settings;

        config.AppSettings.Settings.Add(new System.Configuration.KeyValueConfigurationElement("myKey", "myValue"));
        config.Save();

So the point is to load specific config (add appSettings in you wish), add new keys and save it.

Happy coding!

answered Dec 5, 2012 at 14:30

Gregor Primar

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Comments

Soner Gönül · Accepted Answer · 2012-12-05 14:23:35Z

0

You can check if your web.config has appSettings tag or not like this;

string s = ConfigurationManager.AppSettings["appSettings"];

if (!String.IsNullOrEmpty(s))
{
    // Key exists
}
else
{
    // Key doesn't exist
}

I couldn't find anything adding dynamically appSettings tag but found three-part series about .NET configuration that could be quite usefull.

edited Dec 5, 2012 at 14:23

answered Dec 5, 2012 at 14:02

Soner Gönül

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1 Comment

GowthamanSS Over a year ago

its k how can we add appsettings tag to it

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