Hi,

You could set series' tooltips to the X,Y values of each point. If you implement the Series interface yourself, you can generate them automatically from GetLabel(LabelKinds.ToolTip) implementation.

These appear when mouse hovers over a point from the series, and not for segment points in between. If you need the latter, you'll need to show them via custom tooltip.

Regards,
Slavcho
Mindfusion

Hi,

E.g. try these two approaches in LineChart example:

var yValues = new List<double> { 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24 };
var yTooltips = yValues.Select(y => y.ToString()).ToList();
lineChart.Series.Add(
	new Series2D(
		new List<double> { 0,1,2,3,4,5,6,7,8,9,10,11 },
		yValues, yTooltips
	)
	{
		Title = "Series 2",
		SupportedLabels = LabelKinds.ToolTip /*| LabelKinds.InnerLabel*/
	});

lineChart.Series.Add(
	new YTooltip(
		new Series2D(
			new List<double> { 0,1,2,3,4,5,6,7,8,9,10,11 },
			new List<double> { 1,2,3,4,5,6,7,8,9,10,11,12 },
			labels
		)
		{ Title = "Series 1" }));

class YTooltip : Series
{
	public LabelKinds SupportedLabels =>
		series.SupportedLabels | LabelKinds.ToolTip;

	public string GetLabel(int index, LabelKinds kind)
	{
		if (kind == LabelKinds.ToolTip)
			return series.GetValue(index, 1).ToString();

		return series.GetLabel(index, kind);
	}

	public YTooltip(Series series)
	{
		Debug.Assert(series.Dimensions >= 2);
		this.series = series;
	}

	public int Size => series.Size;

	public int Dimensions => series.Dimensions;

	public string Title => series.Title;

	public double GetValue(int index, int dimension)
	{
		return series.GetValue(index, dimension);
	}

	public bool IsEmphasized(int index) { return series.IsEmphasized(index); }

	public bool IsSorted(int dimension) { return false; }

	public event EventHandler DataChanged;

	Series series;
} 

Regards,
Slavcho
Mindfusion