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Posted 20 May 2011

DLL with configuration file

, 22 May 2011 CPOL
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Using configuration files in DLL is not trivial, but is very simple.
Using configuration files in DLL is not trivial.
To accomplish this, we must follow these steps:

  • Add a reference to System.Configuration
  • Add a new Application Configuration File and the name it [Your project].dll.config
  • Change the BuildAction property of the config file to Content
  • Change the Copy to Output property to "Copy Always"


After these steps, you can access the configuration file this way:
//Open the configuration file using the dll location
Configuration myDllConfig = 
       ConfigurationManager.OpenExeConfiguration(this.GetType().Assembly.Location);
// Get the appSettings section
AppSettingsSection myDllConfigAppSettings = 
       (AppSettingsSection)myDllConfig.GetSection("appSettings");
// return the desired field 
return myDllConfigAppSettings.Settings["MyAppSettingsKey"].Value; 


Your configuration file should look like this:
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <appSettings>
    <add key ="MyAppSettingsKey" value="MyValue"/>
  </appSettings>
</configuration>


That's all. Hope you enjoy this tip.

License

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

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About the Author

fmsalmeida
Software Developer (Senior) ResourceKraft
Ireland Ireland
I'm a Brazilian senior system analyst living in Limerick, Ireland. I've been working with software development since 1996.

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Comments and Discussions

 
QuestionVS10 Saves Setting to Project.dll.config Pin
Member 462571327-Mar-12 6:24
memberMember 462571327-Mar-12 6:24 
GeneralReason for my vote of 5 This solved a problem that I've been... Pin
jtdavies8-Feb-12 9:54
memberjtdavies8-Feb-12 9:54 
GeneralReason for my vote of 5 Nice, I like it, and I am bookmarkin... Pin
FDW3-Nov-11 2:06
memberFDW3-Nov-11 2:06 
GeneralReason for my vote of 5 It is very good :) Pin
Caner Korkmaz23-Aug-11 1:14
memberCaner Korkmaz23-Aug-11 1:14 
GeneralReason for my vote of 5 Bookmarked for future ref. Pin
KeithAMS2-Jun-11 23:40
memberKeithAMS2-Jun-11 23:40 
QuestionPossible in .NET 1.1? Pin
KeithAMS28-Oct-11 0:28
memberKeithAMS28-Oct-11 0:28 
AnswerRe: Possible in .NET 1.1? Pin
fmsalmeida28-Oct-11 4:18
memberfmsalmeida28-Oct-11 4:18 
GeneralGood Tip Pin
KeithAMS2-Jun-11 23:40
memberKeithAMS2-Jun-11 23:40 
I've come across this problem before, I got round it by putting my setting in the machine.config files which I knew was a "bad idea". I wish I'd known this tip then.Thumbs Up | :thumbsup:
KM

I'm pink therefore I'm Spam

GeneralRe: Good Tip Pin
fmsalmeida3-Jun-11 3:32
memberfmsalmeida3-Jun-11 3:32 
GeneralExplain why.... Pin
EngleA27-May-11 4:28
memberEngleA27-May-11 4:28 
GeneralRe: Explain why.... Pin
fmsalmeida27-May-11 5:16
memberfmsalmeida27-May-11 5:16 
QuestionToo complex? Pin
Riz Thon23-May-11 21:03
memberRiz Thon23-May-11 21:03 
AnswerRe: Too complex? Pin
fmsalmeida24-May-11 5:10
memberfmsalmeida24-May-11 5:10 

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