# Doughnut Charts

You can add doughnut charts to your spreadsheet using Spread for ASP.NET. Learn more in documentation.

## Content



The doughnut chart can be a pie plot such as the one shown in this figure.

![Doughnut Chart, example of Pie plot](https://cdn.mescius.io/document-site-files/images/346c9178-0ed8-4fb9-908b-1565b22fb408/artwork/plottypes-donut1.png)

Each point in a pie series has a single data value. Each point is visualized as a pie slice.

The [HoleSize](/spreadnet/api/latest/online-asp/FarPoint.Web.Chart/FarPoint.Web.Chart.PiePlotArea.HoleSize.html) property is used to create the doughnut chart. If this property is not set when using the [PieSeries](/spreadnet/api/latest/online-asp/FarPoint.Web.Chart/FarPoint.Web.Chart.PieSeries.html) class, the chart would be a pie chart.

A pie series can be assigned a border and fill effect for the pie slices. Assigning null for a border or fill effect indicates that the property is null.

Each point can be assigned a border, fill effect, and a detachment distance for the pie slice. Detachment distance is measured relative to pie radius (0 = no detachment, 1 = detachment is length of pie radius). The detachment distance ([PieDetachments](/spreadnet/api/latest/online-asp/FarPoint.Web.Chart/FarPoint.Web.Chart.PieSeries.PieDetachments.html) property) is used to create an exploded doughnut chart.

For more information on the pie series object in the API, refer to the [PieSeries](/spreadnet/api/latest/online-asp/FarPoint.Web.Chart/FarPoint.Web.Chart.PieSeries.html) class.