Custom app.config section with a simple list of “add” elements

by

Full example with code based on OP config file:

<configuration>
    <configSections>
        <section name="registerCompanies" 
                 type="My.MyConfigSection, My.Assembly" />
    </configSections>
    <registerCompanies>
        <add name="Tata Motors" code="Tata"/>
        <add name="Honda Motors" code="Honda"/>
    </registerCompanies>
</configuration>

Here is the sample code to implement a custom config section with collapsed collection

using System.Configuration;
namespace My {
public class MyConfigSection : ConfigurationSection {
    [ConfigurationProperty("", IsRequired = true, IsDefaultCollection = true)]
    public MyConfigInstanceCollection Instances {
        get { return (MyConfigInstanceCollection)this[""]; }
        set { this[""] = value; }
    }
}
public class MyConfigInstanceCollection : ConfigurationElementCollection {
    protected override ConfigurationElement CreateNewElement() {
        return new MyConfigInstanceElement();
    }

    protected override object GetElementKey(ConfigurationElement element) {
        //set to whatever Element Property you want to use for a key
        return ((MyConfigInstanceElement)element).Name;
    }
}

public class MyConfigInstanceElement : ConfigurationElement {
    //Make sure to set IsKey=true for property exposed as the GetElementKey above
    [ConfigurationProperty("name", IsKey = true, IsRequired = true)]
    public string Name {
        get { return (string) base["name"]; }
        set { base["name"] = value; }
    }

    [ConfigurationProperty("code", IsRequired = true)]
    public string Code {
        get { return (string) base["code"]; }
        set { base["code"] = value; }
    } } }

Here is an example of how to access the configuration information from code.

var config = ConfigurationManager.GetSection("registerCompanies") 
                 as MyConfigSection;

Console.WriteLine(config["Tata Motors"].Code);
foreach (var e in config.Instances) { 
   Console.WriteLine("Name: {0}, Code: {1}", e.Name, e.Code); 
}

More Related Contents:

  1. C# DLL config file
  2. What is App.config in C#.NET? How to use it?
  3. How to read AppSettings values from a .json file in ASP.NET Core
  4. Change default app.config at runtime
  5. Get connection string from App.config
  6. App.Config change value
  7. Equivalent to ‘app.config’ for a library (DLL)
  8. How to implement a ConfigurationSection with a ConfigurationElementCollection
  9. Encrypt connection string in app.config
  10. How to create custom config section in app.config? [duplicate]
  11. Relocating app.config file to a custom path
  12. How to programmatically modify WCF app.config endpoint address setting?
  13. Use XML includes or config references in app.config to include other config files’ settings
  14. Can a unit test project load the target application’s app.config file?
  15. ConfigurationManager doesn’t save settings
  16. Variables within app.config/web.config
  17. Can a class library have an App.config file?
  18. Is ConfigurationManager.AppSettings available in .NET Core 2.0?
  19. How to get a List collection of values from app.config in WPF?
  20. Update app.config system.net setting at runtime
  21. Consume a SOAP web service without relying on the app.config
  22. How to enable configSource attribute for Custom Configuration Section in .NET?
  23. Changing App.config at Runtime
  24. Read from App.config in a Class Library project
  25. How to find path of active app.config file?
  26. How to modify my App.exe.config keys at runtime?
  27. Its all about CLR Hosting [closed]
  28. byte + byte = int… why?
  29. How can I ignore unknown enum values during json deserialization?
  30. How exactly do static fields work internally? [duplicate]

Leave a Comment