The crosshairs aren't important, I need the hittest's XValue and YValue to make sense.

I've attached a screenshot of two charts, with the only difference between them
being one is of charttype 'Column' and the other of 'Bar'.

I've plotted som X Y values from the hittest.XValue and hittest.YValue functions, as you can see the xy values
on the bar chart doesn't make sense.

 Here's the code I used

 
  Private Sub XamChart1_MouseDown(ByVal sender As Object, ByVal e As System.Windows.Input.MouseEventArgs) Handles XamChart1.MouseDown

        Dim h As Infragistics.Windows.Chart.HitTestArgs = XamChart1.HitTest(e)
        Dim x As Double = e.MouseDevice.GetPosition(LayoutRoot).X - 5
        Dim y As Double = e.MouseDevice.GetPosition(LayoutRoot).Y - 10

        Dim lbl As New Label
        lbl.Content = "<- X:" & Math.Round(h.XValue, 2) & " - Y:" & Math.Round(h.YValue, 2)
        lbl.Margin = New Thickness(x, y, 0, 0)
        LayoutRoot.Children.Insert(0, lbl)

 
   End Sub
 
   Private Sub Bind()

        Dim ds As New System.Data.DataSet
        ds.ReadXml("C:\TestXMLBinding\TestXMLBinding\Data\ScatterplotData.xml")

        Dim axisX As New Infragistics.Windows.Chart.Axis
        axisX.AxisType = Infragistics.Windows.Chart.AxisType.PrimaryX
        axisX.Label.Format = "{0:n3}"
        Name = "X"
        XamChart1.Axes.Add(axisX)

        Dim axisY As New Infragistics.Windows.Chart.Axis
        axisY.AxisType = Infragistics.Windows.Chart.AxisType.PrimaryY
        axisY.Label.Format = "{0:n1}"
        Name = "Y"
        XamChart1.Axes.Add(axisY)


        Dim s As Infragistics.Windows.Chart.Series = New Infragistics.Windows.Chart.Series
        s.DataSource = ds.Tables(0)
        s.DataMapping = "label=x;value=y"
        s.ChartType = Infragistics.Windows.Chart.ChartType.Bar
        s.AxisX = "X"
        s.AxisY = "Y"

        XamChart1.Series.Add(s)

    End Sub
 
 
 

although the ordinal axes (X in column chart, Y in bar chart) are displaying "100, 120, etc," these are just labels; they do not represent a numeric value on the axis.  they could just as easily say "john, paul, george, and ringo."  so the values HitTest is returning are correct.  i think what you need to do is round to the nearest integer, then get the point back from your datasource using that value as an index.

if you want the X and Y axes to both represent a numeric scale, try using a Scatter or ScatterLine series.

Hi David,

I am experiencing a similar issue. I have a line chart with dates on x- axis. I want to track the mouse move and display the x-axis date and y-axis value anywhere on the chart. I tried using hittest xvalue and yvalue. But xvalue is returning the point location and not the label. I tried using datapoint.label, but that just returns the labels for a valid data point and not any point on chart.

Please advise.