Home/ Questions/Q 4014156
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-20T09:27:45+00:00

So I’m starting to play with the Microsoft Chart control for the first time

  • 0

So I’m starting to play with the Microsoft Chart control for the first time and I ran into an issue.

I’m returning a database query into a List object and using that list object to fill the X and Y axes of my chart as seen below. (_runData is a “List(of DatabaseTableName)” style Object filled with the results of my query.

Primary_Chart.Series(0).Points.DataBindXY(_runData, "DateTime", _runData, "UPPER_PRESSURE")

My Datetime field is returning as a Serial Number (i.e. 40116.76111) so I want to format the X Axis to display the field more readably. Enter my problem code.

Chart_Obj.ChartAreas(0).AxisX.LabelStyle.Format = "MM"

This code changes my axis to display MM instead of the Serial Number. I have experimented with other Formatting type and the result is that my Axis Labels change to read exactly as whatever I put after the = sign.

What am I missing here?
Thanks a ton.

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    You need to set the XValueType on the series to DateTime or Date so that the charts know to display the values as datetimes rather than doubles.

    Primary_Chart.Series(0).XValueType = ChartValueType.DateTime

    For more details see http://msdn.microsoft.com/en-us/library/system.web.ui.datavisualization.charting.series.xvaluetype.aspx

    • 0