Start and End when zooming

[Ola Mallaug]

I have a line chart with values on the Y-Axis and Time on the X-Axis.

When I zoom in on the X-Axis, I would like to know start time and end time on the X-Axis.

I suspect this can be obtained from "PrimaryXAxis.VisibleRange" or "PrimaryXAxis.ZoomedRange"

The problem is that I don't know how to convert the number from these into a date/time.

Any suggestions?

[Baby Palanidurai]

Hi Ola, 

Greetings from Syncfusion. 

We have analyzed your query. Your requirement has been achieved by visibleRangeChanged event. This event will trigger whenever range is changed during the zooming. In this event, we can get the min and max range from the primary x axis VisibleRange object.  And you can convert it to the date time from the number in this event.  

For more information about visibleRangeChanged Event, kindly find the below documentation link, 

https://help.syncfusion.com/windowsforms/chart/chart-control-events#visiblerangechanged-event 

Please find the below code snippet to achieve this requirement, 

this.chart1.VisibleRangeChanged += Chart1_VisibleRangeChanged; 

private void Chart1_VisibleRangeChanged(object sender, EventArgs e) 

        { 

            //Maximum value of x axis while zooming 

            var maxValue = chart1.PrimaryXAxis.VisibleRange.Max; 

            //Mimimum value of x axis while zooming 

            var minValue = chart1.PrimaryXAxis.VisibleRange.Min; 

            //convert double value to DateTime value 

            DateTime max = DateTime.FromOADate(maxValue); 

            DateTime min = DateTime.FromOADate(minValue); 

            MessageBox.Show("Max:" + max + "\n" + "Min:" + min); 

        } 

Screenshot: 

 

Sample link: http://www.syncfusion.com/downloads/support/directtrac/general/ze/chartRange-1887357911 

Kindly revert us, if you have any concerns. 

Regards, 

Baby. 

[Ola Mallaug]

Thank you very much. The best part of Syncfusion is good service always!

[Baby Palanidurai]

Hi Ola,

Most welcome. Kindly revert us, if you need further assistance. We are always happy in assisting you.

Regards,
Baby.