C#: How to make sure a settings variable exists before attempting to use it from another assembly?

c# settings settings.settings
michael picture michael · Jan 10, 2011 · Viewed 19.9k times · Source

I have the following:

using CommonSettings = MyProject.Commons.Settings;

public class Foo
{
    public static void DoSomething(string str)
    {
        //How do I make sure that the setting exists first?
        object setting = CommonSettings.Default[str];

        DoSomethingElse(setting);
    }
}

Answer

salle55 picture salle55 · Jan 9, 2014

If you are using a SettingsPropertyCollection you have to loop and check which settings exists yourself it seems, since it doesn't have any Contains-method.

private bool DoesSettingExist(string settingName)
{
   return Properties.Settings.Default.Properties.Cast<SettingsProperty>().Any(prop => prop.Name == settingName);
}

Related questions

ConfigurationManager.AppSettings - How to modify and save?

It might sound too trival to ask and I do the same thing as suggested in articles, yet it doesn't work as expected. Hope someone can point me to the right direction. I would like to save the usersettings per …

Read More
Equivalent to 'app.config' for a library (DLL)

Is there an equivalent to app.config for libraries (DLLs)? If not, what is the easiest way to store configuration settings that are specific to a library? Please consider that the library might be used in different applications.

Read More
Where are the Properties.Settings.Default stored?

I thought I knew this, but today I'm being proven wrong - again. Running VS2008, .NET 3.5 and C#. I added the User settings to the Properties Settings tab with default values, then read them in using this code: myTextBox.Text = …

Read More