Thanks. It worked.  I have one more problem.  I need the dates on the Gantt Charts to be the same as the ones in the line chart below. Is there any way in which I can customize the dates to be the same. I tried to make the X Axis common but the datatype for the line charts in set to String and Gantt Charts only require Time.  Is there a way in which I can change it from String to Time. What should I change to get the Axis datatype for the line charts to be Time?  If I change the datatype to Time directly,  the line graph does not show up.   

Oh. Actually I don't want to change the dates in the line charts. Those are very specific and  so I was hoping that I would  be able to modify the Gantt Chart Axis. Is there a way where I can customize the X Axis for the Gantt Charts? Can I set the axis and then draw the gantt data based on that customized  axis? I need the same dates as those in the line chart.  

Moreover,  how can I modify the tooltip for the Gantt Data? When it was an individual data I could do it but not that it is a composite chart I am a bit confused. 

Is it possible to add some text in the tooltip. I need to add a small description in the tooltips. If I say custom tooltip it changes the tooltip for both the line and the gantt chart. I have the description of the tooltip in an Arraylist. How can I bind it into the Gantt Data? I was planning of putting the description in the GanttItem Label.

So what you're trying to do is use a string X axis with the gantt chart. Unfortunately, that will not work.

As for tooltips, you can modify the tooltip output string if you use a custom label formatter:

//this goes in Form_Load
Hashtable labelHash = new Hashtable();
labelHash.Add("CUSTOM", new LabelRenderer());
ultraChart1.LabelHash = labelHash;
ultraChart1.Tooltips.FormatString = "<CUSTOM>";

public class LabelRenderer:IRenderLabel
{
 public string ToString(Hashtable context)
 {
  //examine context hashtable to get various environment variables within
  //do processing
  //return final string that will be on the tooltip
 }
}

The contents of the context hashtable are different for different data points, so the best way to see those contents is to place a break point in the ToString method and explore the hashtable through the debugger.

If you're using DataItemOver, you don't really need to use a label renderer. You can set the tooltip explicitly in that event:

private void ultraChart1_DataItemOver(object sender, Infragistics.UltraChart.Shared.Events.ChartDataEventArgs e)
{
   GanttItem item = e.Primitive.DataPoint as GanttItem;
   int index = (int) e.Primitive.Tags["TIME_ENTRY_INDEX"];
   string tooltip = item.Times[index].Label;
   ultraChart1.Tooltips.FormatString = tooltip;
}

It's also a good idea to reset the format string back to what it was in DataItemOut event, since you are changing the tooltip for the entire chart.

I'm having a difficult time picturing this behavior and I've never heard of random points appearing in the line. Can you attach a screenshot and/or provide a sample project to reproduce this problem?

Keeping the last point in the line or any collection can be simply done by using a for loop instead of foreach. Something like (for int i=0; i<points.Length-1; i++). This will leave the last item alone.

I have one more problem coming up. I am observing that on one of the lines in my line chart, there are random points drawing in which have no value or tooltip. I surely dont have them in my dataset. I have heard that they can be eliminated using the fill scene graph. But is there any other way in which I can remove those null point. Doing them in the fill scene graph is messing up my ps.icons for different lines. 

Here is how I am getting rid of them

foreach (DataPoint goodPoint in line.points)

{

if (goodPoint != null)

{

if (goodPoint.Value != null)

{

goodPoint.DataPoint.Label);

dp2[i] = goodPoint;

i++;

}

}

}

But then this is deleting the last point on that polyline which is actually  point.

So I am writing the following code to get the last point of the line.

My different lines have different icons. This line is somehow taking the icon from other lines.  I am trying to draw a character icon on this line. Here is the code where I am drawing the icons again (I have declared them when I am creating the respective layers itself.)

foreach (Primitive p1 in scene)

{

if (p1 is PointSet)

{

PointSet ps = p1 as PointSet;

bool bAllGood = true;

foreach (DataPoint dp in ps.points)

{

if (dp.Empty)

bAllGood = false;

}

bool resistance_point = false;

if (bAllGood)

{

resistance_point = ps.character.ToString().Contains("R");

if (resistance_point)

{

ps.icon = SymbolIcon.Character;

ps.character = 'R';

ps.font = new Font(FontFamily.GenericSansSerif, (float)13.0);

}

else

{

ps.icon = SymbolIcon.Circle;

}

}

}

}

Your help is deeply appreciated.

Thanks,

Ketaki

I was able to use the UltraTooltipManager for the tool tips.  Thanks

Thanks a lot. That worked, but the text lines I am putting inside the tooltip are all centered. Can I have them formatted. I am wondering if I can add the UltraToolTipManager to the top chart. Can you please tell me how can I achieve this one? I have never worked with the UltratooltipManager 

I am not understanding how I am supposed to add the UltratooltipManager in place of  the default tooltips. Moreover How do I put my text for formatting in the UltratooltipManager.