How to get the key value from the AppSettings.Config file?

Question

I'm trying to get my key value set in the appsettings.Config file but seems not working.

This is what i wrote for that. The code is called from the constructor of an MDI file and its returning only null value. Anybody know why?

     var getValue = ConfigurationSettings.AppSettings["ShowQueryTextbox"];

I also tried with ConfigurationManager.AppSettings . That too didnt work.

My AppSettings Code is as follows.

<configuration>
  <appSettings>
    <add key="ShowQueryTextbox" value="true"/>
  </appSettings>
</configuration>

Answer 1

ConfigurationSettings.AppSettings are obsolete, try

ConfigurationManager.AppSettings["ShowQueryTextbox"];

Answer 2

Remember that to use:

ConfigurationManager.AppSettings["MyKey"];

You need to add reference to System.Configuration to your project.

Answer 3

The issue arise on renaming the App.Config file as AppSettings.Config. Thanks for all the guidances and help.

Answer 4

The ConfigurationManager is still up to date - Year 2017.

Btw, if you simply want to convert the appsettings configuration value from string to bool, then use Convert.ToBoolean

    if (Convert.ToBoolean(ConfigurationManager.AppSettings["EnableLoggingInfo"]))
    {
        log.Info(message);
    }

In your appsettings configuration (web.config)

<appSettings>
    <add key="EnableLoggingInfo" value="true" />

  </appSettings>

Answer 5

I am able to get like this:

System.Configuration.ConfigurationManager.AppSettings.Get("KEY").ToString();