BindingCollection.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Framework / MS / Internal / Data / BindingCollection.cs / 1305600 / BindingCollection.cs
                        

                        
                            //---------------------------------------------------------------------------- 
//
// 
//    Copyright (C) Microsoft Corporation.  All rights reserved.
//  
//
// Description: Defines BindingList object, a list of binds. 
// 
// Specs:       http://avalon/connecteddata/M5%20Specs/UIBind.mht
// 
//---------------------------------------------------------------------------

using System;
using System.Collections; 
using System.Collections.Generic;
using System.Collections.ObjectModel; 
using System.Diagnostics; 
using System.Windows;
using System.Windows.Markup; 
using System.Windows.Data;
using MS.Utility;
using MS.Internal;
 
namespace MS.Internal.Data
{ 
 
/// 
///  A list of bindingss, used by MultiBinding classes. 
/// 
internal class BindingCollection : Collection
{
 
    //-----------------------------------------------------
    // 
    //  Constructors 
    //
    //----------------------------------------------------- 

    ///  Constructor 
    internal BindingCollection(BindingBase owner, BindingCollectionChangedCallback callback)
    { 
        Invariant.Assert(owner != null && callback != null);
        _owner = owner; 
        _collectionChangedCallback = callback; 
    }
 
    // disable default constructor
    private BindingCollection()
    {
    } 

 
 
    //------------------------------------------------------
    // 
    //  Protected Methods
    //
    //-----------------------------------------------------
 
    #region Protected Methods
 
    ///  
    /// called by base class Collection<T> when the list is being cleared;
    /// raises a CollectionChanged event to any listeners 
    /// 
    protected override void ClearItems()
    {
        _owner.CheckSealed(); 
        base.ClearItems();
        OnBindingCollectionChanged(); 
    } 

    ///  
    /// called by base class Collection<T> when an item is removed from list;
    /// raises a CollectionChanged event to any listeners
    /// 
    protected override void RemoveItem(int index) 
    {
        _owner.CheckSealed(); 
        base.RemoveItem(index); 
        OnBindingCollectionChanged();
    } 

    /// 
    /// called by base class Collection<T> when an item is added to list;
    /// raises a CollectionChanged event to any listeners 
    /// 
    protected override void InsertItem(int index, BindingBase item) 
    { 
        if (item == null)
            throw new ArgumentNullException("item"); 
        ValidateItem(item);
        _owner.CheckSealed();

        base.InsertItem(index, item); 
        OnBindingCollectionChanged();
    } 
 
    /// 
    /// called by base class Collection<T> when an item is added to list; 
    /// raises a CollectionChanged event to any listeners
    /// 
    protected override void SetItem(int index, BindingBase item)
    { 
        if (item == null)
            throw new ArgumentNullException("item"); 
        ValidateItem(item); 
        _owner.CheckSealed();
 
        base.SetItem(index, item);
        OnBindingCollectionChanged();
    }
 
    #endregion Protected Methods
 
 
    //------------------------------------------------------
    // 
    //  Private Methods
    //
    //------------------------------------------------------
 
    void ValidateItem(BindingBase binding)
    { 
        // for V1, we only allow Binding as an item of BindingCollection. 
        if (!(binding is Binding))
            throw new NotSupportedException(SR.Get(SRID.BindingCollectionContainsNonBinding, binding.GetType().Name)); 
    }

    void OnBindingCollectionChanged()
    { 
        if (_collectionChangedCallback != null)
            _collectionChangedCallback(); 
    } 

    //----------------------------------------------------- 
    //
    //  Private Fields
    //
    //------------------------------------------------------ 

    BindingBase _owner; 
    private BindingCollectionChangedCallback _collectionChangedCallback; 
}
 
// the delegate to use for getting BindingListChanged notifications
internal delegate void BindingCollectionChangedCallback();

} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.

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