Blazor Area Chart

An Area Chart represents the change in a one or more values over time and is great fit for both Blazor WebAssembly (WASM) and Server-side dashboard applications. Areas in the chart are created by plotting a series of data points over time, connecting those data points with line segments, and then filling in the area between the line and the x-axis with color.

Example of Blazor Area chart.

The Area chart is a data bound component which also provides the flexibility to bind axes and series to various data sources separately or together.

More about chart data binding in Blazor.

You can customize all aspects of the Area chart – from the series color and opacity, to its labels content, font, size, position, line styles and even missing values.

The Area chart supports different styles for the lines between its data points – Normal (straight line), Step (horizontal and vertical lines) and Smooth (fitted curve).

The Area chart supports displaying dates on the x-axis which aggregates the data points that fall within its scope to a single data point that gets rendered.

The Area Chart can render more than one axis in each dimension and you can associate each series with its own axes. This lets you associate data series with different axes, and position them to the left, right, top or bottom of the chart.

The Area chart lets you stack different series in one data category on top of each other to showcase cumulative effects.

Example with chart stacked series in Blazor.

If some values are missing from the Area series data, you have options to configure how those missing values to be visualized by the component:

• Zero (the line goes to 0 value mark)
• Interpolate - the line will go through the interpolated value of the missing data points and connect to the next data point with a value.
• Gap - behaves the same way as Zero because a line chart cannot have a gap in its filled area.

You can also mix different types of series in a single chart to create more compelling visuals – such as column charts and line charts, or area charts.

The Area Chart renders in the browser to preserve server resources. It has SVG markup and <canvas> rendering modes to improve performance further, and it can even animate during rendering for a smoother user experience.

The Label Format Strings in UI for Blazor Area Charts, are culture aware so your users see, for example, the expected number formats with the decimal and thousands separators they are used to.

The Telerik Blazor Area Chart component has several built-in themes such as Default (our own styling), Material (based on the Material Design guidelines), Bootstrap (which looks like the Bootstrap styling to integrate better) and Fluent (based on Microsoft Fluent UI). Each theme predefines several series colors, so your data is visualized according to your design guidelines. You can further customize any of the out-of-the box themes, style a specific chart component or create new theme to match your colors and branding by using the Telerik SASS ThemeBuilder application.

The Telerik UI for Blazor Area Chart component supports right-to-left configuration. The RTL functionality is supported by most of our components to accommodate users who communicate in a right-to-left language script, such as Arabic and Hebrew.

Learn more in our Blazor Right-to-Left Support documentation