// Gives event subscriber a chance to prevent // the dialog from closing, based on // the current state of the app and the button // used to commit. Note that we don't // have full access at this stage to // the full dialog state. internal int RaiseClosingEvent(int id) { EventHandler <TaskDialogClosingEventArgs> handler = Closing; if (handler != null) { TaskDialogButtonBase customButton = null; TaskDialogClosingEventArgs e = new TaskDialogClosingEventArgs(); // Try to identify the button - is it a standard one? TaskDialogStandardButtons buttonClicked = MapButtonIdToStandardButton(id); // If not, it had better be a custom button... if (buttonClicked == TaskDialogStandardButtons.None) { customButton = GetButtonForId(id); // ... or we have a problem. if (customButton == null) { throw new InvalidOperationException(LocalizedMessages.TaskDialogBadButtonId); } e.CustomButton = customButton.Name; e.TaskDialogResult = TaskDialogResult.CustomButtonClicked; } else { e.TaskDialogResult = (TaskDialogResult)buttonClicked; } // Raise the event and determine how to proceed. handler(this, e); if (e.Cancel) { return((int)HResult.False); } } // It's okay to let the dialog close. return((int)HResult.Ok); }
// Gives event subscriber a chance to prevent // the dialog from closing, based on // the current state of the app and the button // used to commit. Note that we don't // have full access at this stage to // the full dialog state. internal int RaiseClosingEvent(int id) { EventHandler<TaskDialogClosingEventArgs> handler = Closing; if (handler != null) { TaskDialogButtonBase customButton = null; TaskDialogClosingEventArgs e = new TaskDialogClosingEventArgs(); // Try to identify the button - is it a standard one? TaskDialogStandardButtons buttonClicked = MapButtonIdToStandardButton(id); // If not, it had better be a custom button... if (buttonClicked == TaskDialogStandardButtons.None) { customButton = GetButtonForId(id); // ... or we have a problem. if (customButton == null) { throw new InvalidOperationException(LocalizedMessages.TaskDialogBadButtonId); } e.CustomButton = customButton.Name; e.TaskDialogResult = TaskDialogResult.CustomButtonClicked; } else { e.TaskDialogResult = (TaskDialogResult)buttonClicked; } // Raise the event and determine how to proceed. handler(this, e); if (e.Cancel) { return (int)HResult.False; } } // It's okay to let the dialog close. return (int)HResult.Ok; }