MultiSelector.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 / System / Windows / Controls / Primitives / MultiSelector.cs / 1305600 / MultiSelector.cs
                        

                        
                            //---------------------------------------------------------------------------- 
//
// Copyright (C) Microsoft Corporation.  All rights reserved.
//
//--------------------------------------------------------------------------- 

using System; 
using System.ComponentModel; 
using System.Collections;
using System.Collections.ObjectModel; 

namespace System.Windows.Controls.Primitives
{
 
    /// 
    /// Extends the Selector class by adding a multi selection support. 
    ///  
    public abstract class MultiSelector : Selector
    { 
        /// 
        /// Returns whether or not multiple items can be selected
        /// 
        protected bool CanSelectMultipleItems 
        {
            get { return base.CanSelectMultiple; } 
            set { base.CanSelectMultiple = value; } 
        }
 
        /// 
        /// Returns the collection of currently Selected Items.
        /// Note, this is not the set of items that are pending selection.
        /// Exceptions: 
        /// While IsUpdatingSelectedItems, using the indexer, Insert, and RemoveAt will throw InvalidOperationExceptions.
        /// If CanSelectMultiple is false then Adding one item to SelectedItems is valid but adding items after that is invalid and will result in an InvalidOperationException. 
        ///  
        [Bindable(true), Category("Appearance"), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
        public IList SelectedItems 
        {
            get
            {
                return SelectedItemsImpl; 
            }
        } 
 
        #region BulkSelection
 
        /// 
        /// Starts a new selection transaction, setting IsUpdatingSelectedItems to true.
        /// Exceptions: InvalidOperationException if IsUpdatingSelectedItems is true.
        ///  
        protected void BeginUpdateSelectedItems()
        { 
            ((SelectedItemCollection)SelectedItems).BeginUpdateSelectedItems(); 
        }
 
        /// 
        /// Commits a selection transaction, populating or removing items from the SelectedItems collection and resets IsUpdatingSelectedItems to false.
        /// Exceptions: InvalidOperationException if IsUpdatingSelectedItems is false
        ///  
        protected void EndUpdateSelectedItems()
        { 
            ((SelectedItemCollection)SelectedItems).EndUpdateSelectedItems(); 
        }
 
        /// 
        /// Returns true if SelectedItems is being updated using the deferred update behavior.
        /// Otherwise, it is false and updating SelectedItems is immediate.
        /// Calling BeginUpdateSelectedItems will set this value to become true. 
        /// Calling EndUpdateSelectedItems will cause the deferred selections to be submitted and this value to become false.
        ///  
        protected bool IsUpdatingSelectedItems 
        {
            get 
            {
                return ((SelectedItemCollection)SelectedItems).IsUpdatingSelectedItems;
            }
        } 

        ///  
        ///     Select all the items 
        /// Exceptions: InvalidOperationExcpetion if CanSelectMultipleItems is false
        ///  
        public void SelectAll()
        {
            if (CanSelectMultipleItems)
            { 
                SelectAllImpl();
            } 
            else 
            {
                throw new NotSupportedException(SR.Get(SRID.MultiSelectorSelectAll)); 
            }
        }

        ///  
        ///     Clears all of the selected items.
        ///  
        public void UnselectAll() 
        {
            UnselectAllImpl(); 
        }

        #endregion BulkSelection
 
    }
 
} 


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

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