示例#1
0
        /// <summary>
        ///   Raises the Changing event. </summary>
        /// <param name="e">
        ///   The arguments object associated with the Changing event. </param>
        /// <remarks>
        ///   This method should be invoked prior to making a change to the profile so that the
        ///   Changing event is raised, giving a chance to the handlers to prevent the change from
        ///   happening (by setting e.Cancel to true). This method calls each individual handler
        ///   associated with the Changing event and checks the resulting e.Cancel flag.
        ///   If it's true, it stops and does not call of any remaining handlers since the change
        ///   needs to be prevented anyway. </remarks>
        /// <seealso cref="Changing" />
        /// <seealso cref="OnChanged" />
        protected virtual void OnChanging(ProfileChangingArgs e)
        {
            if (Changing == null)
            {
                return;
            }

            foreach (ProfileChangingHandler handler in Changing.GetInvocationList())
            {
                handler(this, e);

                // If a particular handler cancels the event, stop
                if (e.Cancel)
                {
                    break;
                }
            }
        }
示例#2
0
        /// <summary>
        ///   Raises either the Changing or Changed event. </summary>
        /// <param name="changing">
        ///   If true, the Changing event is raised otherwise it's Changed. </param>
        /// <param name="changeType">
        ///   The type of change being made. </param>
        /// <param name="section">
        ///   The name of the section that was involved in the change or null if not applicable. </param>
        /// <param name="entry">
        ///   The name of the entry that was involved in the change or null if not applicable.
        ///   If changeType is equal to Other, entry is the name of the property involved in the change.</param>
        /// <param name="value">
        ///   The value that was changed or null if not applicable. </param>
        /// <returns>
        ///   The return value is based on the event raised.  If the Changing event was raised,
        ///   the return value is the opposite of ProfileChangingArgs.Cancel; otherwise it's true.</returns>
        /// <remarks>
        ///   This method may be used by derived classes as a convenient alternative to calling
        ///   OnChanging and OnChanged.  For example, a typical call to OnChanging would require
        ///   four lines of code, which this method reduces to two. </remarks>
        /// <seealso cref="Changing" />
        /// <seealso cref="Changed" />
        /// <seealso cref="OnChanging" />
        /// <seealso cref="OnChanged" />
        protected bool RaiseChangeEvent(bool changing, ProfileChangeType changeType, string section, string entry, object value)
        {
            if (changing)
            {
                // Don't even bother if there are no handlers.
                if (Changing == null)
                {
                    return(true);
                }

                ProfileChangingArgs e = new ProfileChangingArgs(changeType, section, entry, value);
                OnChanging(e);
                return(!e.Cancel);
            }

            // Don't even bother if there are no handlers.
            if (Changed != null)
            {
                OnChanged(new ProfileChangedArgs(changeType, section, entry, value));
            }
            return(true);
        }