Question

I’m looking to set the y-axis for a MSChart to be midnight to midnight, in either regular time format(i.e. – “1:30 AM”) or military time. I figured out I can specify the y-axis format using ChartArea.AxisY.LabelStyle = new LabelStyle() { Format = “HH:mm” }, but cannot figure out what to set the minimum/maximum values to be.

Has anyone employed this format?

Answer 1

There are a few things you need to do to get this working properly.

MSChart accepts DateTime objects as Y values. You can emulate durations by doing this for each of your data points (assuming they are timespans or something convertible into a TimeSpan):

TimeSpan testSpan = TimeSpan.FromMinutes(5);

YourChart.Series(0).Points.AddY(new DateTime(testSpan.Ticks))

That will convert it into a datetime starting from the the beginning of CLR time (e.g. 1/1/0001 12:05:00 AM).

Then just use the label format “HH:mm” on the Y-axis.

<asp:ChartArea Name="VsChartArea">      
    <AxisY Minimum="0">
        <LabelStyle Format="HH:mm" />
    </AxisY>
</asp:ChartArea>

That should make it look like this:

To setup a custom interval (5 minutes):

<AxisY Minimum="0" IntervalType="Minutes" Interval="5">

Hope this helps!