Rendering Modes
The Chart for Blazor supports two modes for rendering its data. You can set the desired rendering mode through the RenderAs parameter the TelerikChart exposes. It takes a member of the Telerik.Blazor.RenderingMode enum and depending on the result you are trying to achieve, you can choose one of the following:
SVG
The default rendering mode of the Chart is SVG (Scalable Vector Graphics) and it is recommended for general use.
Using vector graphics ensures that:
- The browser zoom does not degrade the image.
- The prints are crisp regardless of the resolution.
In addition, the SVG Chart provides accessibility features such as general description and aria label templates out of the box.
Bar Chart rendered as SVG
<TelerikChart Width="700px" Height="400px">
<ChartSeriesItems>
<ChartSeries Type="ChartSeriesType.Bar" Name="Product 1" Data="@series1Data">
</ChartSeries>
<ChartSeries Type="ChartSeriesType.Bar" Name="Product 2" Data="@series2Data">
</ChartSeries>
</ChartSeriesItems>
<ChartCategoryAxes>
<ChartCategoryAxis Categories="@xAxisItems"></ChartCategoryAxis>
</ChartCategoryAxes>
<ChartTitle Text="Quarterly revenue per product"></ChartTitle>
<ChartLegend Position="ChartLegendPosition.Right">
</ChartLegend>
</TelerikChart>
@code {
public List<object> series1Data = new List<object>() { 10, 2, 5, 6 };
public List<object> series2Data = new List<object>() { 5, 8, 2, 7 };
public string[] xAxisItems = new string[] { "Q1", "Q2", "Q3", "Q4" };
}
Canvas
When performance is critical (for example when rendering large dashboards and frequently updated charts) it is recommended to use Canvas (bitmap).
The browser does not have to maintain a live DOM tree for the Chart which results in:
- Quicker screen updates.
- Lower memory usage.
On the downside, rendering a fixed resolution bitmap results in:
- Blurry images on zoom.
- Poorer print quality.
- No built-in accessibility features.
Bar Chart rendered as Canvas
<TelerikChart RenderAs="@RenderingMode.Canvas" Width="700px" Height="400px">
<ChartSeriesItems>
<ChartSeries Type="ChartSeriesType.Bar" Name="Product 1" Data="@series1Data">
</ChartSeries>
<ChartSeries Type="ChartSeriesType.Bar" Name="Product 2" Data="@series2Data">
</ChartSeries>
</ChartSeriesItems>
<ChartCategoryAxes>
<ChartCategoryAxis Categories="@xAxisItems"></ChartCategoryAxis>
</ChartCategoryAxes>
<ChartTitle Text="Quarterly revenue per product"></ChartTitle>
<ChartLegend Position="ChartLegendPosition.Right">
</ChartLegend>
</TelerikChart>
@code {
public List<object> series1Data = new List<object>() { 10, 2, 5, 6 };
public List<object> series2Data = new List<object>() { 5, 8, 2, 7 };
public string[] xAxisItems = new string[] { "Q1", "Q2", "Q3", "Q4" };
}