SelectedDatesCollection.cs source code in C# .NET

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Code:

                         / DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / xsp / System / Web / UI / WebControls / SelectedDatesCollection.cs / 1 / SelectedDatesCollection.cs
                        

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

namespace System.Web.UI.WebControls { 
 
    using System;
    using System.Collections; 
    using System.Security.Permissions;


    ///  
    /// Encapsulates the collection of  within a  control.
    ///  
    [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)] 
    public sealed class SelectedDatesCollection : ICollection {
 
        private ArrayList dateList;


        ///  
        /// Initializes a new instance of the  class
        ///    with the specified date list. 
        ///  
        public SelectedDatesCollection(ArrayList dateList) {
            this.dateList = dateList; 
        }


        ///  
        ///    Gets the item count of the collection.
        ///  
        public int Count { 
            get {
                return dateList.Count; 
            }
        }

 
        /// 
        /// Gets a  referenced by the specified ordinal index value in the collection. 
        ///  
        public DateTime this[int index] {
            get { 
                return(DateTime) dateList[index];
            }
        }
 

        ///  
        /// Adds the specified  to the end of the collection. 
        /// 
        public void Add(DateTime date) { 
            int index;
            if (!FindIndex(date.Date, out index)) {
                dateList.Insert(index, date.Date);
            } 
        }
 
 
        /// 
        /// Removes all  controls from the collection. 
        /// 
        public void Clear() {
            dateList.Clear();
        } 

 
        ///  
        ///    Returns a value indicating whether the collection contains the specified
        ///       date. 
        /// 
        public bool Contains(DateTime date) {
            int index;
            return FindIndex(date.Date, out index); 
        }
 
 
        /// 
        ///  
        private bool FindIndex(DateTime date, out int index) {
            int n = Count;
            int Min = 0;
            int Max = n; 
            while (Min < Max) {
                index = (Min + Max ) / 2; 
                if (date == this[index]) { 
                    return true;
                } 
                if (date < this[index]) {
                    Max = index;
                }
                else { 
                    Min = index + 1;
                } 
            } 
            index = Min;
            return false; 

        }

 
        /// 
        /// Returns an enumerator of all  controls within the collection. 
        ///  
        public IEnumerator GetEnumerator() {
            return dateList.GetEnumerator(); 
        }


        ///  
        /// Copies contents from the collection to a specified  with a
        ///    specified starting index. 
        ///  
        public void CopyTo(Array array, int index) {
            for (IEnumerator e = this.GetEnumerator(); e.MoveNext();) 
                array.SetValue(e.Current, index++);
        }

 
        /// 
        ///    Gets the object that can be used to synchronize access to the collection. In 
        ///       this case, it is the collection itself. 
        /// 
        public Object SyncRoot { 
            get { return this;}
        }

 
        /// 
        ///    Gets a value indicating whether the collection is read-only. 
        ///  
        public bool IsReadOnly {
            get { return false;} 
        }


        ///  
        ///    Gets a value indicating whether access to the collection is synchronized
        ///       (thread-safe). 
        ///  
        public bool IsSynchronized {
            get { return false;} 
        }


 
        /// 
        ///    Removes the specified date from the collection. 
        ///  
        public void Remove(DateTime date) {
            int index; 
            if (FindIndex(date.Date, out index)) {
                dateList.RemoveAt(index);
            }
        } 

 
        ///  
        /// Sets the contents of the  to span
        ///    across the specified date range. 
        /// 
        public void SelectRange(DateTime fromDate, DateTime toDate) {
            dateList.Clear();
            if (fromDate <= toDate) { 
                // The while loop below is safe that it is not attempting to add
                // day beyond the last supported date because toDate can happen 
                // to be the last supported date. 
                dateList.Add(fromDate);
                DateTime date = fromDate; 
                while (date < toDate) {
                    date = date.AddDays(1);
                    dateList.Add(date);
                } 
            }
        } 
    } 
}

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