DictionarySectionHandler
Provides key/value pair configuration information from a configuration section.
using System.Collections;
using System.Xml;
namespace System.Configuration
{
public class DictionarySectionHandler : IConfigurationSectionHandler
{
protected virtual string KeyAttributeName => "key";
protected virtual string ValueAttributeName => "value";
internal virtual bool ValueRequired => false;
public virtual object Create(object parent, object context, XmlNode section)
{
Hashtable hashtable = (parent != null) ? ((Hashtable)((Hashtable)parent).Clone()) : new Hashtable(StringComparer.OrdinalIgnoreCase);
HandlerBase.CheckForUnrecognizedAttributes(section);
foreach (XmlNode childNode in section.ChildNodes) {
if (!HandlerBase.IsIgnorableAlsoCheckForNonElement(childNode)) {
if (childNode.Name == "add") {
HandlerBase.CheckForChildNodes(childNode);
string key = HandlerBase.RemoveRequiredAttribute(childNode, KeyAttributeName);
string text = ValueRequired ? HandlerBase.RemoveRequiredAttribute(childNode, ValueAttributeName) : HandlerBase.RemoveAttribute(childNode, ValueAttributeName);
HandlerBase.CheckForUnrecognizedAttributes(childNode);
hashtable[key] = (text ?? "");
} else if (childNode.Name == "remove") {
HandlerBase.CheckForChildNodes(childNode);
string key2 = HandlerBase.RemoveRequiredAttribute(childNode, KeyAttributeName);
HandlerBase.CheckForUnrecognizedAttributes(childNode);
hashtable.Remove(key2);
} else if (childNode.Name.Equals("clear")) {
HandlerBase.CheckForChildNodes(childNode);
HandlerBase.CheckForUnrecognizedAttributes(childNode);
hashtable.Clear();
} else {
HandlerBase.ThrowUnrecognizedElement(childNode);
}
}
}
return hashtable;
}
}
}