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DLL with configuration file

, 22 May 2011 CPOL 58K 36
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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
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

 
QuestionThanks for the straight-to-the-point instructions, it helped me a lot! Pin
Member 124954625-May-14 5:20
memberMember 124954625-May-14 5:20 
AnswerRe: Thanks for the straight-to-the-point instructions, it helped me a lot! Pin
fmsalmeida12-Nov-14 3:53
memberfmsalmeida12-Nov-14 3:53 
QuestionNot working when updating config file values Pin
xyz from Bangalore20-Oct-13 18:50
memberxyz from Bangalore20-Oct-13 18:50 
AnswerRe: Not working when updating config file values Pin
fmsalmeida12-Nov-14 3:57
memberfmsalmeida12-Nov-14 3:57 
GeneralRe: Not working when updating config file values Pin
Member 1061559423-Apr-15 9:33
memberMember 1061559423-Apr-15 9:33 
GeneralMy vote of 5 Pin
remi22211-Jul-13 7:27
memberremi22211-Jul-13 7:27 
GeneralRe: My vote of 5 Pin
fmsalmeida12-Nov-14 3:57
memberfmsalmeida12-Nov-14 3:57 
QuestionNot work in WebApplication Pin
Mlsoun1-Oct-12 2:04
memberMlsoun1-Oct-12 2:04 
AnswerRe: Not work in WebApplication Pin
Fregate19-Feb-13 16:03
memberFregate19-Feb-13 16:03 
GeneralRe: Not work in WebApplication Pin
fmsalmeida20-Feb-13 0:12
memberfmsalmeida20-Feb-13 0:12 
GeneralRe: Not work in WebApplication Pin
Fregate20-Feb-13 12:15
memberFregate20-Feb-13 12:15 
GeneralRe: Not work in WebApplication Pin
eng_george128-Jan-14 1:30
membereng_george128-Jan-14 1:30 
GeneralRe: Not work in WebApplication Pin
Member 348500310-Apr-15 4:33
memberMember 348500310-Apr-15 4:33 
GeneralRe: Not work in WebApplication Pin
Member 112799398-May-15 7:25
memberMember 112799398-May-15 7:25 
QuestionVS10 Saves Setting to Project.dll.config Pin
Member 462571327-Mar-12 5:24
memberMember 462571327-Mar-12 5:24 
GeneralReason for my vote of 5 This solved a problem that I've been... Pin
jtdavies8-Feb-12 8:54
memberjtdavies8-Feb-12 8:54 
GeneralReason for my vote of 5 Nice, I like it, and I am bookmarkin... Pin
FDW3-Nov-11 1:06
memberFDW3-Nov-11 1:06 
GeneralReason for my vote of 5 It is very good :) Pin
Caner Korkmaz23-Aug-11 0:14
memberCaner Korkmaz23-Aug-11 0:14 
GeneralReason for my vote of 5 Bookmarked for future ref. Pin
KeithAMS2-Jun-11 22:40
memberKeithAMS2-Jun-11 22:40 
Reason for my vote of 5
Bookmarked for future ref.
QuestionPossible in .NET 1.1? Pin
KeithAMS27-Oct-11 23:28
memberKeithAMS27-Oct-11 23:28 
AnswerRe: Possible in .NET 1.1? Pin
fmsalmeida28-Oct-11 3:18
memberfmsalmeida28-Oct-11 3:18 
GeneralGood Tip Pin
KeithAMS2-Jun-11 22:40
memberKeithAMS2-Jun-11 22:40 
GeneralRe: Good Tip Pin
fmsalmeida3-Jun-11 2:32
memberfmsalmeida3-Jun-11 2:32 
GeneralExplain why.... Pin
EngleA27-May-11 3:28
memberEngleA27-May-11 3:28 
GeneralRe: Explain why.... Pin
fmsalmeida27-May-11 4:16
memberfmsalmeida27-May-11 4:16 
QuestionToo complex? Pin
Riz Thon23-May-11 20:03
memberRiz Thon23-May-11 20:03 
AnswerRe: Too complex? Pin
fmsalmeida24-May-11 4:10
memberfmsalmeida24-May-11 4:10 

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