Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Sys / System / Configuration / DictionarySectionHandler.cs / 1305376 / DictionarySectionHandler.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Configuration { using System.Collections; using System.Collections.Specialized; using System.Xml; using System.Globalization; ////// Simple dictionary config factory /// config is a dictionary mapping key->value /// /// <add key="name" value="text"> sets key=text /// <remove key="name"> removes the definition of key /// <clear> removes all definitions /// /// public class DictionarySectionHandler : IConfigurationSectionHandler { ////// Given a partially composed config object (possibly null) /// and some input from the config system, return a /// further partially composed config object /// public virtual object Create(Object parent, Object context, XmlNode section) { Hashtable res; // start res off as a shallow clone of the parent if (parent == null) res = new Hashtable(StringComparer.OrdinalIgnoreCase); else res = (Hashtable)((Hashtable)parent).Clone(); // process XML HandlerBase.CheckForUnrecognizedAttributes(section); foreach (XmlNode child in section.ChildNodes) { // skip whitespace and comments, throws if non-element if (HandlerBase.IsIgnorableAlsoCheckForNonElement(child)) continue; // handle, , tags if (child.Name == "add") { HandlerBase.CheckForChildNodes(child); String key = HandlerBase.RemoveRequiredAttribute(child, KeyAttributeName); String value; if (ValueRequired) value = HandlerBase.RemoveRequiredAttribute(child, ValueAttributeName); else value = HandlerBase.RemoveAttribute(child, ValueAttributeName); HandlerBase.CheckForUnrecognizedAttributes(child); if (value == null) value = ""; res[key] = value; } else if (child.Name == "remove") { HandlerBase.CheckForChildNodes(child); String key = HandlerBase.RemoveRequiredAttribute(child, KeyAttributeName); HandlerBase.CheckForUnrecognizedAttributes(child); res.Remove(key); } else if (child.Name.Equals("clear")) { HandlerBase.CheckForChildNodes(child); HandlerBase.CheckForUnrecognizedAttributes(child); res.Clear(); } else { HandlerBase.ThrowUnrecognizedElement(child); } } return res; } /// /// Make the name of the key attribute configurable by derived classes. /// protected virtual string KeyAttributeName { get { return "key";} } ////// Make the name of the value attribute configurable by derived classes. /// protected virtual string ValueAttributeName { get { return "value";} } // internal virtual bool ValueRequired { get { return false; } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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