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JsonDataSource.FillAsync() Method

Populates JsonDataSource with data in an asynchronous manner.

Namespace: DevExpress.DataAccess.Json

Assembly: DevExpress.DataAccess.v22.2.dll

NuGet Package: DevExpress.DataAccess


public Task FillAsync()


Type Description

A task that populates the data source.


Use this method to populate a JSON data source in an individual task asynchronously. Unlike the Fill() method call, FillAsync does not lock other actions performed concurrently. For instance, the user interface remains operational while the data source is populated.

Call the FillAsync method with the await operator.

Handle the FillError event, or catch the JsonDataSourceException exception, to process the case when the FillAsync method failed to populate the data source.


The code sample below creates a JsonDataSource and populates it with data in an asynchronous manner.

using System.Threading;
using System.Threading.Tasks;
using DevExpress.DataAccess;
using DevExpress.DataAccess.Json;
// ...
// Create a new JSON source.
var jsonSource = new UriJsonSource() {
    Uri = new Uri(@"")
// Assign the JSON source to the data source.
var datasource = new JsonDataSource() {
    JsonSource = jsonSource
await datasource.FillAsync();
report.DataSource = datasource;
See Also