CanExecuteRoutedEventArgs.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 / Core / CSharp / System / Windows / Input / Command / CanExecuteRoutedEventArgs.cs / 1305600 / CanExecuteRoutedEventArgs.cs
                        

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

using System; 
using System.Windows; 
using System.Windows.Input;
 
namespace System.Windows.Input
{
    /// 
    ///     Event handler associated with the CanExecute events. 
    /// 
    public delegate void CanExecuteRoutedEventHandler(object sender, CanExecuteRoutedEventArgs e); 
 
    /// 
    ///     Event arguments for the CanExecute events. 
    /// 
    public sealed class CanExecuteRoutedEventArgs : RoutedEventArgs
    {
        #region Constructors 

        ///  
        ///     Initializes a new instance of this class. 
        /// 
        /// The command that is being executed. 
        /// The parameter that was passed when executing the command.
        internal CanExecuteRoutedEventArgs(ICommand command, object parameter)
        {
            if (command == null) 
            {
                throw new ArgumentNullException("command"); 
            } 

            _command = command; 
            _parameter = parameter;
        }

        #endregion 

        #region Public Properties 
 
        /// 
        ///     The command that could be executed. 
        /// 
        public ICommand Command
        {
            get { return _command; } 
        }
 
        ///  
        ///     The parameter passed when considering executing the command.
        ///  
        public object Parameter
        {
            get { return _parameter; }
        } 

        ///  
        ///     Whether the command with the specified parameter can be executed. 
        /// 
        public bool CanExecute 
        {
            get { return _canExecute; }
            set { _canExecute = value; }
        } 

        ///  
        ///     Whether the input event (if any) that caused the command 
        ///     should continue its route.
        ///  
        public bool ContinueRouting
        {
            get { return _continueRouting; }
            set { _continueRouting = value; } 
        }
 
        #endregion 

        #region Protected Methods 

        /// 
        ///     Calls the handler.
        ///  
        /// Handler delegate to invoke
        /// Target element 
        protected override void InvokeEventHandler(Delegate genericHandler, object target) 
        {
            CanExecuteRoutedEventHandler handler = (CanExecuteRoutedEventHandler)genericHandler; 
            handler(target as DependencyObject, this);
        }

        #endregion 

        #region Data 
 
        private ICommand _command;
        private object _parameter; 
        private bool _canExecute;       // Defaults to false
        private bool _continueRouting;  // Defaults to false

        #endregion 
    }
} 
 


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

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