WinForms Chart control - Show labels between ticks

By default the WinForms Chart control shows labels centrally below the ticks.

Is there any way to change that so that the labels are shown between the ticks instead, as per this image:

回答1:

I think the only way to do this would be to use custom labels. That means taking over the job of adding the labels from the control and doing it manually yourself, which may or may not be suitable in your case.

The "Labeling Axes Using Custom Labels" section of the MSDN documentation describes this in more detail:

Use custom labels to provide custom text for axes. Custom labels are implemented using the CustomLabels collection property. If you use custom labels, the chart area does not display axis labels from data points.

When using CustomLabel objects, you must set the ToPosition and FromPosition properties of each CustomLabel object, and these properties must specify the width of the label's text area. Do not assign the same value to both of these properties because they represent a range. To position a custom label directly beneath a data point and its associated tick mark, set the FromPosition property to the value of that data point's axis minus half of the tick mark interval, and set the ToPosition property to the value of that data point's axis plus half of the tick mark interval. For example, if an axis has an interval of 1 (1, 2, 3,…), and you want to use a custom label at X=2, then set the ToPosition and FromPosition properties to 1.5 and 2.5, respectively.

The RowIndex property specifies on which row the custom label is displayed. If a custom label is used in the first label row, the chart area does not display any labels from the axis scale. The only labels permitted in the second row and beyond are custom labels.

In your case you don't want the labels to be directly below the tick mark, so in the example in the quoted text above you'd set your position ToPosition to 2 and your FromPosition to 3.

Looking at your specific graph, if the x-axis values are DateTimes, you'll need to check if the To/From Positions will work with DateTimes. If not, you may need to convert the values to serial numbers (you could use e.g. DateTime.ToOADate() to do this) before using them for the x-axis. That won't effect what's displayed as you will be replacing those labels with your own ones anyway, which you can then format as you wish.

回答2:

The regular Labels will always show with the DataPoints. But you can show the tick marks between.

Depending on the datatype and Interval you can set an MajorTickMark.IntervalOffset:

chart1.ChartAreas[0].AxisX.MajorTickMark.IntervalOffset =
                     chart1.ChartAreas[0].AxisX.Interval / 2f;

Note: For this to work you need to set the Interval. By default it is set to 0.0, so you need to set it to some other value! Most of the tome a value of 1 will be fine.

The harder altenative would be to use CustomLabels for that.. Much more work for the same result. Not really recommended. You can see an example here