Async/await keywords in ASP.NET are used to simplify asynchronous programming, allowing developers to write non-blocking code without explicitly managing threads. They enable a more natural way of expressing concurrency and help avoid potential deadlocks or race conditions.
In an application where multiple time-consuming operations need to be performed concurrently, such as downloading large files or querying databases, async/await can be effectively utilized. For example, consider a web service that retrieves data from multiple external APIs:
public async Task<IEnumerable<string>> GetDataFromApisAsync()
var api1Task = GetApi1DataAsync();
var api2Task = GetApi2DataAsync();
await Task.WhenAll(api1Task, api2Task);
return new List<string> { await api1Task, await api2Task };
private async Task<string> GetApi1DataAsync() { /* ... */ }
private async Task<string> GetApi2DataAsync() { /* ... */ }
Here,
GetDataFromApisAsync
initiates two asynchronous tasks for fetching data from different APIs. The method then awaits their completion using
Task.WhenAll
, ensuring both tasks finish before returning the combined results. This approach allows the application to perform other tasks while waiting for API responses, improving overall responsiveness and throughput.
