CODEWITHSUNDEEP
.netasynchronouswebclient
kad81
kad81

Reputation: 10950

.NET Async Get Request - Don't care about Response

I want to send a request to a web service and I don't care about the response. The service performs operations in a database--I'm calling it from a simple .NET 4.0 console application that will be set to run on a schedule. This works:

using (var client = new WebClient()) {
    client.UseDefaultCredentials = true;
    client.DownloadString(uri);
}

but blocks the thread until the response is received. I'd rather do:

using (var client = new WebClient()) {
    client.UseDefaultCredentials = true;
    client.DownloadStringAsync(uri);
}

but this simply doesn't seem to be sending the request (the database operations are not performed). Is there are really simple solution?

Thanks.

Upvotes: 0

Views: 176

Answers (1)

Jon Skeet
Jon Skeet

Reputation: 1503310

Yes, the async version will fail as you're disposing of the client immediately.

You could either not dispose of the client:

var client = new WebClient();
client.UseDefaultCredentials = true;
client.DownloadStringAsync(uri);

... or (better) attach an event to dispose of it when it completes:

var client = new WebClient();
client.UseDefaultCredentials = true;
client.DownloadStringCompleted += delegate { client.Dispose(); };
client.DownloadStringAsync(uri);

(You should check whether you need to subscribe to any other events to dispose of it on failure - I can't remember offhand whether the event is still fired in that case.)

Upvotes: 4

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