A pie chart
represents one or more values as slices of a circular surface in
3D or 2D views. Donut charts are identical to pie charts
except for the fact that a hole is cut out of the center of the
circular surface, creating a donut shape. .netCHARTING supports multiple
or donuts on one chart in addition to a single pie or
donut per chart. Chart series can each render as a slice
for a single pie or multiple series can be drawn with their own
pie for each series. Pie and donut charts are excellent
for displaying data comparatively, showing the specific values
for each slice, or automatically calculated percentages.
This pie chart demonstrates a single
series with multiple elements in 3D view. Variable
transparency support enables you to control if the inner
structure, or wire frame, is visible. In this
example a small amount of transparency is used to
enhance the appearance of the pie.
This pie is showing the same chart in 2D
view. While 3D charts add visual eye candy, 2D charts are
easier to read accurately. For this reason a shading
effect is implemented to enhance the visuals of 2D pies while
maintaining the ease of information communication afforded with
a 2D chart.
The donut chart is particularly
compelling in 3D views. Here it is shown with
partial transparency so the wire frame structure is
visible. Donut charts can also be exploded (where
each section of the donut is separated instead of joined
to the adjacent section).
Multiple pie or donut charts can be
rendered within a single chart area. In this case
4 pie charts are shown with the exploded view style.