MapControl.UpdateMode Property
Gets or sets the update mode used by the MapControl.
Syntax
public MapControlUpdateMode UpdateMode { get; set; }Property Value
Remarks
The update mode determines when a MapControl, and the View it displays, is updated. The MapControl manages update requests from several different sources - the built-in tools, running animations, when datasets have read new data, paint events from the GUI, and also explicit calls to UpdateView or View.Update. Depending on the value of this property, the control decides whether to update the view immediately, reschedule an update at a later time, or to ignore a request completely.
Scheduled updates
The default value for this property is Scheduled. In this mode, the map control is smart and only updates the view when needed. The interval between two updates is always at least that specified by the UpdateInterval property - if update requests are received too quickly, the control will reschedule the request at a later time.
This update mode is the default because it allows a high frame rate during for instance mouse interactions, but also avoids updating the view unnecessarily, thereby reducing CPU/GPU usage and possibly improving battery time.
Timer updates
In this mode, the control will update itself at regular intervals. The update rate is determined by the UpdateInterval property. All other updates will be ignored except for UpdateView with True as a parameter.
It is useful in cases where you want a slow periodic update, with the ability to call UpdateView when you need an update in between the periodic updates. Tool updates will however still be ignored. You can implement your own tool and use UpdateView.
If you need periodic updates and want the tools to work, you should probably use Scheduled instead, and then implement your own timer to do the extra regular updates.
Immediate mode
In this mode the control will update as soon as it can after UpdateView or View.Update is called, when new data has been read by a dataset, or when the control receives a GUI paint event. The control will not limit the update rate in this mode.
This mode is available for backward compatibility reasons - using Scheduled is almost always a better choice.
Platforms
Windows, Linux, Android