The chart controls can obtain data from one of the ASP.NET data source controls (such as EntityDataSource) on the server side. Use this to provide large amounts of data from the database to the widget, and if you do not need to get data from third-party sources. To assign a data source to a chart, set the chart's BootstrapWebClientUIWidget.DataSourceID property.
Performing AJAX requests is inevitable if your server stores data in JSON. However, instead of configuring these requests manually, you can assign the URL of your data storage to the BootstrapWebClientUIWidget.DataSourceUrl property and the chart control automatically performs the requests required to obtain data from the storage. The URL can specify an absolute or relative path to the resource.