Question

I’m new at YouTube Data API as well as C#. I want to search the video and display the result into a listview and I did but I can’t did it asynchronously. I’ve searched and try a lot but end up with nothing.

http://google-gdata.googlecode.com/svn/docs/folder48/Multithreadedoperations.html

Please help me.

Answer 1

Most WebService API’s (especially RESTful ones) do not provide an async way to retrieve results, since in general, they try to remain stateless: I believe that the Youtube API is no exception.

Instead you will need to lean on traditional methods for simulating async requests, such as one of the following:

• Make smaller, paged requests, and only fire them off as your users scroll through the results and you have none left to display. This means there is less work to do on each request and your UI will be less likely to lock.
• Even if you do this, you may want to use a dedicated thread to take care of fetching the results and feeding them back to the thread responsible for updating your UI. This will ensure your UI remains responsive whatever the latency of the server.
• Alternatively, use an event based framework (a framework that implements the reactor pattern) to make the requests. Under such frameworks you fire off a request and get a callback with the results, allowing you to do other things in the meantime. Under this model you trade off the need for mutexes to protect shared data (used when threading) against the (arguably) added complexity of the callback model.

[edit: for .NET I see that might not be such a good candidate for the reactor based approach]

There is nothing special about YouTube in this regard: you might employ the same techniques when fetching large result sets from most API’s.