I am trying to evaluate the performance of the RadChart in a Silverlight environment. My current chart is a simple line chart. The problem comes when there are numerous datapoints. It is relatively speedy with numbers under 10, but we currently have 400 and there could be more. I had seen in one post that SuspendNotifications and ResumeNotifications was expected to solve this problem, but I haven't had any luck. I've placed the code below that I am using on the VB side to populate the chart. Any assistance would be wonderful. Within the example mData is simply holding the collection of values.
--Johnny
Dim seriesData As New DataSeries
Dim point As DataPoint
seriesData.SuspendNotifications()
For Each row In mData
point =
New DataPoint
point.XValue = row.XVal.ToOADate
point.YValue = row.YVal
seriesData.Add(point)
Next
seriesData.Definition =
New LineSeriesDefinition()
TryCast(seriesData.Definition, LineSeriesDefinition).ShowPointMarks = False
seriesData.Definition.ShowItemLabels =
False
seriesData.Definition.ShowItemToolTips = True
seriesData.Definition.Appearance.StrokeThickness = 1
Chart.DefaultView.ChartArea.AxisX.IsDateTime =
True
Chart.DefaultView.ChartLegend.Visibility = Windows.Visibility.Collapsed
Chart.DefaultView.ChartArea.AxisX.LabelRotationAngle = 90
Chart.DefaultView.ChartArea.AxisX.IsDateTime =
True
Chart.DefaultView.ChartArea.AxisX.DefaultLabelFormat = "MM/dd/yy hh:mm:ss"
Chart.Visibility = Windows.Visibility.Visible
Chart.AnimationSettings.ItemDelay = System.TimeSpan.Zero
StyleManager.SetTheme(Chart,
New SummerTheme)
Chart.DefaultView.ChartArea.DataSeries.Add(seriesData)
seriesData.ResumeNotifications()
1 Answer, 1 is accepted
We must admit that the latest official version of the control introduced a performance issue that becomes problematic when the control is populated with large amount of data. Our developers have already addressed the issue and you can download the fixed binaries from the "Latest Internal Build" section in your Client.Net account.
About the SuspendNotifications / ResumeNotifcations usage -- generally these methods are not part of the public API and are now called internally by the control itself when necessary. That said, speaking about general performance -- we will be working on UI and data virtualization for the Q1 2010 release and we hope that we will be able to achieve noticeable improvements in the loading speed of the control.
Regards,
Manuel
the Telerik team
Instantly find answers to your questions on the new Telerik Support Portal.
Watch a video on how to optimize your support resource searches and check out more tips on the blogs.