void Chart1_MouseMove(object sender, MouseEventArgs e)
{
ChartGroup grp = Chart1.ChartGroups.Group0;
ps = grp.ChartData.PointStylesList[0];
// if both are changed to valid values, then something needs to be highlighted
int seriesIndex = -1, pointIndex = -1;
// check if the mouse is in the PlotArea.
if (Chart1.ChartRegionFromCoord(e.X, e.Y) == ChartRegionEnum.PlotArea)
{
int dist = 0;
// find the closest XCoord.
if (grp.CoordToDataIndex(e.X, e.Y, CoordinateFocusEnum.XCoord, ref seriesIndex, ref pointIndex, ref dist))
{
// if there are multiple series in the chart, then find the closest series.
if (grp.CoordToSeriesIndex(e.X, e.Y, PlotElementEnum.Series, ref seriesIndex, ref dist))
{
ps.PointIndex = pointIndex;
ps.SeriesIndex = seriesIndex;
label3.Text = tlist[pointIndex].ToString();
label4.Text = ylist[pointIndex].ToString();
}
}
if (seriesIndex == -1 || pointIndex == -1)
{
ps.PointIndex = -1;
ps.SeriesIndex = -1;
}
}
}