CalendarDateRange.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Framework / System / Windows / Controls / CalendarDateRange.cs / 1305600 / CalendarDateRange.cs
                        
                        
                            //---------------------------------------------------------------------------- 
//
// Copyright (C) Microsoft Corporation.  All rights reserved.
//
//--------------------------------------------------------------------------- 

using System; 
using System.ComponentModel; 

namespace System.Windows.Controls 
{
    /// 
    /// Specifies a DateTime range class which has a start and end.
    ///  
    public sealed class CalendarDateRange : INotifyPropertyChanged
    { 
        #region Data 
        private DateTime _end;
        private DateTime _start; 
        #endregion Data

        /// 
        /// Initializes a new instance of the CalendarDateRange class. 
        /// 
        public CalendarDateRange() : 
            this(DateTime.MinValue, DateTime.MaxValue) 
        {
        } 

        /// 
        /// Initializes a new instance of the CalendarDateRange class which creates a range from a single DateTime value.
        ///  
        /// 
        public CalendarDateRange(DateTime day) : 
            this(day, day) 
        {
        } 

        /// 
        /// Initializes a new instance of the CalendarDateRange class which accepts range start and end dates.
        ///  
        /// 
        ///  
        public CalendarDateRange(DateTime start, DateTime end) 
        {
            _start = start; 
            _end = end;
        }

        #region Public Events 

        public event PropertyChangedEventHandler PropertyChanged; 
 
        #endregion
 
        #region Public Properties

        /// 
        /// Specifies the End date of the CalendarDateRange. 
        /// 
        public DateTime End 
        { 
            get
            { 
                return CoerceEnd(_start, _end);
            }

            set 
            {
                DateTime newEnd = CoerceEnd(_start, value); 
                if (newEnd != End) 
                {
                    OnChanging(new CalendarDateRangeChangingEventArgs(_start, newEnd)); 
                    _end = value;
                    OnPropertyChanged(new PropertyChangedEventArgs("End"));
                }
            } 
        }
 
        ///  
        /// Specifies the Start date of the CalendarDateRange.
        ///  
        public DateTime Start
        {
            get
            { 
                return _start;
            } 
 
            set
            { 
                if (_start != value)
                {
                    DateTime oldEnd = End;
                    DateTime newEnd = CoerceEnd(value, _end); 

                    OnChanging(new CalendarDateRangeChangingEventArgs(value, newEnd)); 
 
                    _start = value;
 
                    OnPropertyChanged(new PropertyChangedEventArgs("Start"));

                    if (newEnd != oldEnd)
                    { 
                        OnPropertyChanged(new PropertyChangedEventArgs("End"));
                    } 
                } 
            }
        } 

        #endregion Public Properties

        #region Internal Events 

        internal event EventHandler Changing; 
 
        #endregion Internal Events
 
        #region Internal Methods

        /// 
        /// Returns true if any day in the given DateTime range is contained in the current CalendarDateRange. 
        /// 
        ///  
        ///  
        internal bool ContainsAny(CalendarDateRange range)
        { 
            return (range.End >= this.Start) && (this.End >= range.Start);
        }

        #endregion Internal Methods 

        #region Private Methods 
 
        private void OnChanging(CalendarDateRangeChangingEventArgs e)
        { 
            EventHandler handler = this.Changing;
            if (handler != null)
            {
                handler(this, e); 
            }
        } 
 
        private void OnPropertyChanged(PropertyChangedEventArgs e)
        { 
            PropertyChangedEventHandler handler = this.PropertyChanged;
            if (handler != null)
            {
                handler(this, e); 
            }
        } 
 
        /// 
        /// Coerced the end parameter to satisfy the start <= end constraint 
        /// 
        /// 
        /// 
        /// If start <= end the end parameter otherwise the start parameter 
        private static DateTime CoerceEnd(DateTime start, DateTime end)
        { 
            return (DateTime.Compare(start, end) <= 0) ? end : start; 
        }
 
        #endregion Private Methods
    }
}

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

Network programming in C#, Network Programming in VB.NET, Network Programming in .NET
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
CalendarDateRange.cs source code in C# .NET

Source code for the .NET framework in C#

Code:

Link Menu
