Yes, exactly that ...

Did I miss something?

Enrico

It has just occurred to me. Are you mousing over the line and the tooltip isn't showing up, or tha markers?

-Graham

Hi Graham,

No, there are no errors at all in my Output. A single Enumerator item looks like this:

public class DataElement
{
  private String _DateString = "";
  private Double _DateValue = 0;
  private Double _Data = 0;

  public DataElement(String dateString, Double dateValue, Double data)
  {
    _DateString = dateString;
    _DateValue = dateValue;
    _Data = data;
  }

  public String DateString
  {
    get { return _DateString; }
    set { _DateString = value; }
  }

  public Double DateValue
  {
    get { return _DateValue; }
    set { _DateValue = value; }
  }

  public DateTime DateValueDt
  {
    get { return DateTime.FromOADate(_DateValue); }
  }

  public Double Data
  {
    get { return _Data; }
    set { _Data = value; }
  }

  public Object Value
  {
    get { return _Data; }
  }

  public override string ToString()
  {
    return _DateString + ":" +
      _DateValue.ToString() + ":" + _Data.ToString();
  }
}

As you can see, this is a very simple container class. It worked amazingly nice in a sample with the LineSeries together with a CategoryXAxis. When I switched to ScatterLineSeries and NumericXAxis however, the ToolTip stopped working. If I can provide any further information, please ask. I will try to post them as soon as possible.

Thank you very much for your reply and your attempts to help.

Enrico