Thursday, April 18, 2013

await and async keywords in .net

.NET 4.5 has new keywords await and async:

The .NET Framework 4.5 introduced an asynchronous programming concept referred to as a task. The await keyword is syntactical shorthand for indicating that a piece of code should asynchronously wait on some other piece of code. The async keyword represents a hint that you can use to mark methods as task-based asynchronous methods. A scenario like a report method should be executed asynchronously an dinside the method, fetching DB information should be synchronized. Here's how it should display

private async Task ShowReport()
 {
        var result = await DB.ExecuteNonQuery(<<some SP>>);
    // Code to handle the report display
}

Above, bolded words are key. It's saying ShowReport() will execute as async, but DB operation inside it will be synchronized

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