DataBindingCollection.cs :  » 2.6.4-mono-.net-core » System.Web » System » Web » UI » C# / CSharp Open Source

//
// System.Web.UI.DataBindingCollection.cs
//
// Duncan Mak  (duncan@ximian.com)
//
// (C) Ximian, Inc.
// Copyright (C) 2005-2010 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//

using System.ComponentModel;
using System.Collections;
using System.Security.Permissions;

namespace System.Web.UI{

  // CAS - no InheritanceDemand here as the class is sealed
  [AspNetHostingPermission (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  public sealed class DataBindingCollection : ICollection, IEnumerable
  {
    static readonly object changedEvent = new object ();
    Hashtable list;
    ArrayList removed;

    EventHandlerList events = new EventHandlerList ();
    
    public event EventHandler Changed {
      add { events.AddHandler (changedEvent, value); }
      remove { events.RemoveHandler (changedEvent, value); }
    }
    
    public DataBindingCollection ()
    {
      list = new Hashtable ();
      removed = new ArrayList ();
    }

    public int Count {
      get { return list.Count; }
    }

    public bool IsReadOnly {
      get { return list.IsReadOnly; }
    }

    public bool IsSynchronized {
      get { return list.IsSynchronized; }
    }

    public DataBinding this [string propertyName] {
      get { return list [propertyName] as DataBinding; }
    }

    public string [] RemovedBindings {
      get { return (string []) removed.ToArray (typeof (string)); }
    }

    public object SyncRoot {
      get { return list.SyncRoot; }
    }

    public void Add (DataBinding binding)
    {
      list.Add (binding.PropertyName, binding);
      RaiseChanged ();
    }

    public void Clear ()
    {
      list.Clear ();
    }

    public void CopyTo (Array array, int index)
    {
      list.Values.CopyTo (array, index);
    }

    public IEnumerator GetEnumerator ()
    {
      return list.GetEnumerator ();
    }

    public void Remove (DataBinding binding)
    {
      string key = binding.PropertyName;
      Remove (key);
    }

    public void Remove (string propertyName)
    {
      removed.Add (propertyName);
      list.Remove (propertyName);
      RaiseChanged ();
    }

    public void Remove (string propertyName,
            bool addToRemovedList)
    {
      if (addToRemovedList)
        removed.Add (String.Empty); // LAMESPEC
      else
        removed.Add (propertyName);

      list.Remove (propertyName);
    }

    public bool Contains (string propertyName)
    {
      return list.Contains (propertyName);
    }

    internal void RaiseChanged ()
    {
      EventHandler eh = events [changedEvent] as EventHandler;
      if (eh != null)
        eh (this, EventArgs.Empty);
    }
  }
}