DispatcherExceptionEventArgs.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 / Base / System / Windows / Threading / DispatcherExceptionEventArgs.cs / 1305600 / DispatcherExceptionEventArgs.cs
                        

                        
                            //---------------------------------------------------------------------------- 
//
// 
//    Copyright (C) Microsoft Corporation.  All rights reserved.
//  
//
// Description: Arguments for the events that convey an exception that was 
//              raised while executing code via the Dispatcher. 
//
// History: 
//  07/22/2003 : KenLai - Created
//  05/25/2005 : WeibZ -  Rename it
//
//--------------------------------------------------------------------------- 

using System.Diagnostics; 
using System; 

namespace System.Windows.Threading 
{
    /// 
    ///   Arguments for the events that convey an exception that was raised
    ///   while executing code via the dispatcher. 
    /// 
    public sealed class DispatcherUnhandledExceptionEventArgs : DispatcherEventArgs 
    { 
        //-----------------------------------------------------
        // 
        //  Constructors
        //
        //-----------------------------------------------------
 
        // Initialize a new event argument.
        internal DispatcherUnhandledExceptionEventArgs(Dispatcher dispatcher) 
            : base(dispatcher) 
        {
        } 

        //------------------------------------------------------
        //
        //  Public Properties 
        //
        //----------------------------------------------------- 
 
        /// 
        ///     The exception that was raised while executing code via the 
        ///     dispatcher.
        /// 
        public Exception Exception
        { 
            get
            { 
                return _exception; 
            }
        } 

        /// 
        ///     Whether or not the exception event has been handled.
        ///     Other handlers should respect this field, and not display any 
        ///     UI in response to being notified.  Passive responses (such as
        ///     logging) can still be done. 
        ///     If no handler sets this value to true, default UI will be shown. 
        /// 
        public bool Handled 
        {
            get
            {
                return _handled; 
            }
            set 
            { 
                // Only allow to be set true.
                if (value == true) 
                {
                    _handled = value;
                }
            } 
        }
 
        //------------------------------------------------------ 
        //
        //  Internal Methods 
        //
        //------------------------------------------------------

        ///  
        ///     Initialize the preallocated args class for use.
        ///  
        ///  
        ///     This method MUST NOT FAIL because it is called from an exception
        ///     handler: do not do any heavy lifting or allocate more memory. 
        ///     This initialization step is separated from the constructor
        ///     precisely because we wanted to preallocate the memory and avoid
        ///     hitting a secondary exception in the out-of-memory case.
        ///  
        /// 
        ///     The exception that was raised while executing code via the 
        ///     dispatcher 
        /// 
        ///  
        ///     Whether or not the exception has been handled
        /// 
        internal void Initialize(Exception exception, bool handled)
        { 
            Debug.Assert(exception != null);
            _exception = exception; 
            _handled = handled; 
        }
 
        //-----------------------------------------------------
        //
        //  Private Fields
        // 
        //------------------------------------------------------
 
        private Exception _exception; 
        private bool _handled;
    } 

    /// 
    ///   Delegate for the events that convey the state of the UiConext
    ///   in response to various actions that involve items. 
    /// 
    public delegate void DispatcherUnhandledExceptionEventHandler(object sender, DispatcherUnhandledExceptionEventArgs e); 
} 


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

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