Creating Key -Value pair in App.config dynamically

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Hello,

I am trying to some keys in my Windows Application dynamically at the run time. I am able to change the existing key's value at the runtime. Can anyone please help me on how to create Key dynamically at runtime?

Thanks,

Posted 22-Jul-13 3:20am

adityasahver

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3 solutions

Solution 2

You can't (not ones that show up as properties of the Settings class). The settings class with the properties is generated at compile-time, so adding properties would not regenerate that class or your executable. In order to do that you may want to look into different methods of saving settings.

Since you can't serialize the standard dictionary, or hash table, you could roll your own serializable version and save them to an XML file, or you can skip the dictionary all together and create your own Key/Value pair, store it in a List and serialize that. You can then transform the list into a dictionary later for easier access...

Or use a database, etc. There are a number of ways to do it, unfortunately using the Application Settings is not one of them.

Posted 22-Jul-13 3:46am

Ron Beyer

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Sergey Alexandrovich Kryukov 22-Jul-13 11:26am

Agree, a 5. You could just say that config files are not designed to be modified during runtime. The configuration is just loaded and used. This is just a way to have some predefined configuration (modified, say, by an installer) which can be manually modified by a user, to get some different behavior.
—SA

adityasahver 23-Jul-13 3:25am

At the Runtime, i can update the values for the key in the app.config then why cant we add a key in the app.config. Is there much difference in both the tasks, an explanation(with example) will be appreciated.
Thanks,

Sergey Alexandrovich Kryukov 23-Jul-13 10:13am

I just doubt it would make any sense.
—SA

adityasahver 23-Jul-13 6:55am

Ron, i just found the way to update and add keys in the app.config dynamically.
Thanks

Sergey Alexandrovich Kryukov 23-Jul-13 10:13am

Really? I would question: why?
—SA

adityasahver 24-Jul-13 4:54am

Why, can you please elaborate on the question?
Thanks

Sergey Alexandrovich Kryukov 24-Jul-13 9:49am

The question is: why updating the config and adding keys to it.
And, by the way, what is the "config"? It is not "app.config" file, it is "myApplicationFileName.exe.config". Are you updating it..?
—SA

adityasahver 5-Aug-13 2:52am

Yes, i am updating the App.config which i explicitly added to the Application.
Why is it a problem not to update the config file, what are the cons. I can treat it as a temp user specific database, actually i want to maintain a session kind of feature in that even after the application is closed.

Sergey Alexandrovich Kryukov 5-Aug-13 10:16am

Create a single XML file, using Data Contract. It will store and load any object graph serving as that user-specific database. Big deal... Why forcing the features developed for very different purposes?
—SA

Solution 1

You only can use generic types in application settings.

Try one of these:

C#

System.Collections.Specialized.StringDictionary
or
System.Collections.Specialized.StringCollections

Maybe this is helpful too:
store-dictionarystring-string-in-application-settings[^]

Posted 22-Jul-13 3:45am

midnight_

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This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

adityasahver · Accepted Answer · 2013-07-23T00:53:00

Hi,
As i said, that i am able to update the app.config key value pair from the code.
Below is the code which i just updated. The code worked for me, and solution to the question is as well-

C#

Configuration configuration = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
          if (configuration.AppSettings.Settings[key] != null)
          {
              configuration.AppSettings.Settings.Add("key","value");
              //[key].Value = value;

          }

          configuration.Save();

          ConfigurationManager.RefreshSection("appSettings");

Thanks for the inputs provided.

Creating Key -Value pair in App.config dynamically

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Creating Key -Value pair in App.config dynamically

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