Click here to Skip to main content
Click here to Skip to main content

Speedup MSChart Clear Data Points

, 30 Apr 2012
Rate this:
Please Sign up or sign in to vote.
Problem StatementClearing data points in MSChart is known to be very slow.http://connect.microsoft.com/VisualStudio/feedback/details/596212/performance-problem-in-mschart-datapointcollection-clear SolutionHowever, there is a work around for this problem.Suggested work around from link stated

Problem Statement

Clearing data points in MSChart is known to be very slow. http://connect.microsoft.com/VisualStudio/feedback/details/596212/performance-problem-in-mschart-datapointcollection-clear

Solution

However, there is a work around for this problem. Suggested work around from link stated above is as below:

    public void ClearPointsQuick()
    {
        Points.SuspendUpdates();
        while (Points.Count > 0)
            Points.RemoveAt(Points.Count - 1);
        Points.ResumeUpdates();
        Points.Clear(); //NOTE 1
    }

Extension method implementation is as below:

    internal static class MSChartExtension
    {
        public static void ClearPoints(this Series sender)
        {
            sender.Points.SuspendUpdates();
            while (sender.Points.Count > 0)
                sender.Points.RemoveAt(sender.Points.Count - 1);
            sender.Points.ResumeUpdates();
            sender.Points.Clear(); //NOTE 1
        }
    }

(NOTE 1) I added one additional line Points.Clear() at the end of the function to ensure the chart axis updated correctly on next plot. Without adding this line, I observed that previous axis settings will be used when plotting new data points right after calling ClearPoints().

See Also

MSChart Extension: An extension package for MSChart component which contains this fixes and others features.

Revision History

31/03/2012: Added additional line to force axis update on next plot (NOTE 1).
12/03/2012: Initial released.

License

This article, along with any associated source code and files, is licensed under The MIT License

About the Author

Code Artist
Software Developer (Senior)
Malaysia Malaysia

Comments and Discussions

 
-- There are no messages in this forum --
| Advertise | Privacy | Mobile
Web04 | 2.8.140721.1 | Last Updated 30 Apr 2012
Article Copyright 2012 by Code Artist
Everything else Copyright © CodeProject, 1999-2014
Terms of Service
Layout: fixed | fluid