In my example let us create a custom section named mails. It has the mails collection to send messages.
<configuration>
<configSections>
<section name="Mails" type="Samples.XProg.MailsSection, ConfigurationCollectionAttribute" />
</configSections>
<Mails>
<sendlist>
<clear />
<add name="mail1" mail="mail1@noip.com" />
<add name="mail2" mail="mail2@noip.com" />
</sendlist>
</Mails>
</configuration>
using System;using System.Configuration;namespace Samples.XProg{class TestMailConfigurationSection{static void Main(string[] args)
{MailsSection mails = ConfigurationManager.GetSection("MailsSection") as MailsSection;
Console.WriteLine("Mails list:");for (int i = 0; i < mails.SendList.Count; i++)
{Console.WriteLine("Name={0} Mail{1}", mails.SendList[i].Name, mails.SendList[i].Mail);}
Console.ReadLine();
}
}
public class MailsSection : ConfigurationSection
{[ConfigurationProperty("sendlist", IsDefaultCollection = false)]
[ConfigurationCollection(typeof(SendListCollection), AddItemName = "add", ClearItemsName = "clear", RemoveItemName = "remove")]
public SendListCollection SendList{get
{ return (SendListCollection)base["sendlist"];;
}
}
}
public class SendListCollection : ConfigurationElementCollection
{public UrlsCollection(){}
public override ConfigurationElementCollectionType CollectionType
{get
{return ConfigurationElementCollectionType.AddRemoveClearMap;}
}
protected override ConfigurationElement CreateNewElement()
{return new UrlConfigElement();
}
protected override Object GetElementKey(ConfigurationElement element)
{return ((UrlConfigElement)element).Name;}
public MailElement this[int index]
{get
{return (MailElement)BaseGet(index);}
set
{if (BaseGet(index) != null)
{BaseRemoveAt(index);
}
BaseAdd(index, value);}
}
new public MailElement this[string Name]
{get
{return (MailElement)BaseGet(Name);}
}
public int IndexOf(MailElement mail)
{return BaseIndexOf(mail);}
public void Add(MailElement mail)
{BaseAdd(mail);
}
protected override void BaseAdd(ConfigurationElement element)
{BaseAdd(element, false);}
public void Remove(MailElement mail)
{if (BaseIndexOf(mail) >= 0)BaseRemove(mail.Name);
}
public void RemoveAt(int index)
{BaseRemoveAt(index);
}
public void Remove(string name)
{BaseRemove(name);
}
public void Clear()
{BaseClear();
}
}
public class MailElement : ConfigurationElement
{public MailElement(String name, String mail){this.Name = name;this.Mail = mail;}
public MailElement (){}
[ConfigurationProperty("name", IsRequired = true, IsKey = true)]
public string Name
{get
{return (string)this["name"];
}
set
{this["name"] = value;
}
}
[ConfigurationProperty("mail", DefaultValue = "http://www.microsoft.com", IsRequired = true)]
public string Mail
{get
{return (string)this["mail"];
}
set
{this["mail"] = value;
}
}
}
}
