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Configuration App settings in memory

Posted on 2015-01-26
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Last Modified: 2015-01-27
I have an application where the configuration values are read from various classes some of which are static.

How can I ensure that when I get the values from the appSettings the application does not need to reopen the app.config file but uses these from memory.

I had thought of creating a class that I can pass around that just loads the settings into say a List<String>.

Is there a standard way of holding the appSettings in memory and so ensuring better performance?
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Question by:jetbet
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by:it_saige
ID: 40571526
The ConfigurationManager class does load the application settings in memory.

This is why Application Settings that are changed while a program is running do not take affect until the application is restarted (or you explicitly call the RefreshSection method).

You can refer to this blog post for more information: http://www.c-sharpcorner.com/UploadFile/akkiraju/refreshing-the-net-application-to-read-modified-configurati/

-saige-
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LVL 40
ID: 40571851
I have to partially contradict it_saige.

Yes, the application settings are loaded into memory. In fact, it takes the role of the class that you want to create, so I do not see the need for it. Change a setting, and it is changed for the life of the current run of the application.

However, the settings do take effect in the current run of the application as soon as you change them. Change a setting, read it back, it it has the new value.

It's their persistence between runs of the application that could be in question if you do not Save them back to app.config before exiting the application.
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it_saige earned 2000 total points
ID: 40572835
Let me qualify my statement for clarity.  Changing the AppSetting by editing the XML file directly, does not affect the setting while the application is running (this is what the blog post above illustrates).

However, James is correct, if you change the setting that is loaded into memory, then the setting change takes affect immediately.  Also, as James points out, you do need to save the setting(s) back to the XML file when you change them.

-saige-
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