draw own lines in chart

[gunde99]

Hello!

Is it possible to draw a short vertical line (not gridline) in a line-chart at a specific Y-value? I found a component StiVerticalLinePrimitive but how do I set it's Left and Top attributes dynamically, depending on the Y-value which I get from a datasource and the charts data. See below:

chart.JPG (13.19 KiB) Viewed 2561 times

[HighAley]

Hello.

Is it possible to draw a short vertical line (not gridline) in a line-chart at a specific Y-value? I found a component StiVerticalLinePrimitive but how do I set it's Left and Top attributes dynamically, depending on the Y-value which I get from a datasource and the charts data.

Unfortunately, there is no such feature and StiVerticalLinePrimitive will not help you.
But you could use Constant Lines property of the chart. And set it's value from code or, for example, in before print event of the chart.

Code: Select all

this.Item3.AxisValue = "5";

Thank you.

[gunde99]

Thank you for your reply. That looks great but I have two more questions.

1. Is the constans line always called "Item3"? If not, how can I find the name in my charts?

2. This is all well if I know the X-axis-value but in my case I know the Y-axis-value. Could you please post a script example on how to extract the corresponding X-value from the chart's datasource?

[HighAley]

Hello.

1. Is the constans line always called "Item3"? If not, how can I find the name in my charts?

If you add constant line in Designer and it's name is Item3 then this name will be the same and you could use it.

2. This is all well if I know the X-axis-value but in my case I know the Y-axis-value. Could you please post a script example on how to extract the corresponding X-value from the chart's datasource?

It's impossible to get value from the chart. You could get it from Data Source if you know y-axis-value.

Thank you.

[gunde99]

If you add constant line in Designer and it's name is Item3 then this name will be the same and you could use it.

That's my problem. I can't find any name-property and I don't see the name anywhere else in the designer.

chart2.JPG (46.96 KiB) Viewed 2543 times

[HighAley]

Hello.

But you could find it in the code tab.

ConstantLineName.png (25.77 KiB) Viewed 2542 times

Thank you.

[gunde99]

My code looks empty:

(the report.mrt-file you gave me)

chart3.JPG (54.14 KiB) Viewed 2540 times

Am I missing something?

[HighAley]

Hello.

You should enable showing of the Auto Generated code.

AutoGeneratedCode.png (21.34 KiB) Viewed 2537 times

Thank you.

[gunde99]

Ah, there it is! Thank you!

[HighAley]

Hello.

We are always glad to help you.
Let us know if you'll need any additional help.

Thank you.