Hello,
i create a simple Line Chart in a Web-Application. Now i want to add Tooltips for each DataPoint. The Problem is when i want to create a Line Chart with over 20000 DataPoints, first the Browser
load the Application very slow, second the CPU Usage came from 5% to 30% and third when i move the Mouse over an DataPoint the CPU Usage become 50%.
Firefox works very slow but it works. The IE8 crashed with each Mouse over.
I sampled two Methods to add Tooltips, but both bring the same results :
first :
ncwc:NChartControl
ID="NChartControl1"
runat="server">
ncwc:NChartControl>
Dim CH As NCartesianChart = NChartControl1.Charts(0)
Dim line As NLineSeries = CType(CH.Series(b), NLineSeries)
line.Values.AddRange(CType(yValues(b), ArrayList))
line.XValues.AddRange(CType(xValues(b), ArrayList))
For i As Integer = 0 To line.Values.Count - 1
Dim DateVal As DateTime = Convert.ToDateTime(line.XValues(i))
Dim tt As String = String.Format("X: {0}, Y: {1}", CStr(DateVal), line.Values(i))
line.InteractivityStyles.Add(i, New NInteractivityStyle(tt))
Next
second :
ncwc:NChartControl
id="nChartControl1"
runat="server"
AjaxEnabled="True"
AsyncAutoRefreshEnabled="False"
AsyncCallbackTimeout="10000"
AsyncRequestWaitCursorEnabled="False"
OnQueryAjaxTools="nChartControl1_QueryAjaxTools">
ncwc:NChartControl>
Dim CH As NCartesianChart = NChartControl1.Charts(0)
Dim line As NLineSeries = CType(CH.Series(b), NLineSeries)
line.Values.AddRange(CType(yValues(b), ArrayList))
line.XValues.AddRange(CType(xValues(b), ArrayList))
For i As Integer = 0 To line.Values.Count - 1
Dim DateVal As DateTime = Convert.ToDateTime(line.XValues(i))
Dim tt As String = String.Format("X: {0}, Y: {1}", CStr(DateVal), line.Values(i))
line.InteractivityStyles.Add(i, New NInteractivityStyle(True, Nothing, tt))
Next
Protected Sub nChartControl1_QueryAjaxTools(ByVal sender As Object, ByVal e As EventArgs)
nChartControl1.AjaxTools.Add(New NAjaxTooltipTool(True))
End Sub
I hope anyone understand my problem and can help me, because in this Case the Tooltips are very important ...
thanks Marc
PS: sorry for my bad english
