how to show curve name in cursor tooltip when cursor on it in zedgraph with c#

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Hi,
I need to show curve name in cursor tooltip when cursor on it in zedgraph. I can show x and y values of the curve which is under the cursor with

zedGraphControl1.IsShowPointValues = true;

function.But I also need curve name. How can I accomplish using c# ?
Please help :(

Posted 5-May-11 21:34pm

Member 7755322

Updated 5-May-11 21:43pm

v2

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Sergey Alexandrovich Kryukov 6-May-11 9:59am

Tag it! It must be Forms.
--SA

2 solutions

Solution 2

I think the regular technique of using System.Windows.Forms.ToolTip. You can do it all just using System.Windows.Forms.ToolTip.SetTooltip.

(I hope you're using System.Windows.Forms? Please, always tag it in your question.)

For more advanced case, see my past answer:
how to make combobox tooltips disaper once mouse is hovered away from a item in combo[^].

—SA

Posted 6-May-11 4:04am

Sergey Alexandrovich Kryukov

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Olivier Levrey · Accepted Answer · 2011-05-05T22:09:00

Solution 1

To customize the tooltip text, you must subscribe the PointValueEvent:

C#

{
    zedGraphControl1.PointValueEvent += new ZedGraph.ZedGraphControl.PointValueHandler(zedGraphControl1_PointValueEvent);
    ...
}

string zedGraphControl1_PointValueEvent(
    ZedGraph.ZedGraphControl sender, ZedGraph.GraphPane pane,
    ZedGraph.CurveItem curve, int iPt)
{
    return return "X = " + curve[iPt].X.ToString() + " Y = " + curve[iPt].Y.ToString() + " Name = " + curve.Label.Text;
}

Posted 5-May-11 22:09pm

Olivier Levrey

Updated 5-May-11 22:32pm

v4

Comments

Member 7755322 6-May-11 4:24am

Thank you, yes it is what I want :) but this time, curve point values disappeared. How can we show x value,y value and curve name together?

Olivier Levrey 6-May-11 4:32am

I updated my answer to print x and y as well. Please see.
If this solves your problem, then you can accept my answer :)

Member 7755322 6-May-11 4:38am

you are the best! thank you :)

Olivier Levrey 6-May-11 4:39am

You are welcome :)

Sergey Alexandrovich Kryukov 6-May-11 10:05am

I hope it works, my 5, but I think the simple and not intrusive regular Tooltip technique will do.
Please see my answer.
--SA

Olivier Levrey 6-May-11 10:10am

Thank you SA.
ZegGraph control already contains a ToolTip. The event I used in this answer just returns the string to display inside it.

Sergey Alexandrovich Kryukov 6-May-11 11:30am

All right.
--SA