>Hi All, I'm looking at using custom sections in app.config files and came across this code on the web
>
>
>public abstract class BaseConfigurationSection<T> : ConfigurationSection
> where T : ConfigurationSection, new()
> {
> public static T Open()
> {
> Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
> if (config.Sections[typeof(T).Name] == null)
> {
> T instance = new T();
> config.Sections.Add(typeof(T).Name, instance);
> config.Save(ConfigurationSaveMode.Full);
> }
> return config.Sections[typeof(T).Name] as T;
> }
>
> public void Save()
> {
> Configuration configuration = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
> T section = (T)configuration.Sections[typeof(T).Name];
> CopyProperties(this, section);
> configuration.Save(ConfigurationSaveMode.Full);
> }
>
> private static void CopyProperties(ConfigurationElement source, ConfigurationElement destination)
> {
> foreach (PropertyInfo property in source.GetType().GetProperties())
> {
> if (property.IsDefined(typeof(ConfigurationPropertyAttribute), false))
> {
> if (typeof(ConfigurationElement).IsAssignableFrom(property.PropertyType))
> {
> CopyProperties(
> (ConfigurationElement)property.GetValue(source, null),
> (ConfigurationElement)property.GetValue(destination, null));
> }
> else
> {
> object value = property.GetValue(source, null);
> property.SetValue(destination, value, null);
> }
> }
> }
> }
>
> }
>>
>Using this a base class you can then create your own custom sections as shown below
>
>
>
>public class MySection : BaseConfigurationSection<MySection>
> {
> public MySection()
> {
>
> }
>
> [ConfigurationProperty("Destination", DefaultValue = "Some place", IsRequired = true)]
> public string Destination
> {
> get
> {
> return (string)this["Destination"];
> }
> set
> {
> this["Destination"] = value;
> }
> }
>
> [ConfigurationProperty("DialCode", DefaultValue = "01932", IsRequired = true)]
> public string DialCode
> {
> get
> {
> return (string)this["DialCode"];
> }
> set
> {
> this["DialCode"] = value;
> }
> }
>}
>>
>All this seems to work fine, but I want to inherit from "MySection" and am unsure as to how to do it - I've tried the normal way of subclassing
>
>class MySection2:MySection
>{
>}
>>
>but get errors about cannot implicitly convert MySection to MySection2 and so on - is what am trying possible ?
Your concrete MySection class is 'bound' to a MySection element in config.Sections so I'm not sure what you wish to achieve by sub-classing?
Also, the code seems a bit odd. Seems to me that calling Save() without some prior call to MySection.Open() will throw an exception since the section would not exist....
