To get the code, you need to go to code.google.com/p/google-gdata and follow the instructions on the source list.

Note that this

The following is changed:

Release 1.0.5 includes support for the GoogleBatch protocol extensions. Refer to the code.google.com documentation for details on this in general. This is not a generic GoogleBase support checkin, as the creation of GoogleBase XML is currently just that. There are no helper classes yet to do this. But this will be solved shortly.

In the C# libraries batch support is implemented as basic support on the AtomFeed and AtomEntry. Those objects have a new member, called BatchData. Setting this data controls the operations executed on the batchfeed, and this object also holds the return values for from the server.

To create a feed useful to talk to the batch service, you need to know the service URI for this. Here is a code snippet that retrieves that URI.

FeedQuery query = new FeedQuery(); Service service = new Service("gbase", "mytestapplication"); NetworkCredential nc = new NetworkCredential(userName, passWord); service.Credentials = nc;

// setup the google web key GDataGAuthRequestFactory authFactory = service.RequestFactor as GDataGAuthRequestFactory; authFactory.GoogleWebKey = "yourkey";

query.Uri = new Uri("http://base.google.com/base/feeds/items"); AtomFeed baseFeed = service.Query(query);

// this should have a batch URI if (baseFeed.Batch != null) { ....

Note, that to talk to GoogleBase, you also need a web developer key, you can see above that, once you have that key, you only need to set the GoogleWebKey property on the service to use it.

Now to set the default operation you want the batchfeed to do, you use code similiar to this:

batchFeed.BatchData = new GDataBatchFeed(); batchFeed.BatchData.Type = GDataBatchOperationType.delete;

If you do not set this, the feed will default to insert as it's operation type.

You would then go and add entries to your feed. If you want the entry to behave differently than the feed itself, you set the BatchData object on the entry.

entry.BatchData = new GDataBatchEntry(); entry.BatchData.Type = GDataBatchOperationType.insert; entry.BatchData.Id = "some id";

To finally do the batch, you just call the new service method for this purpose:

AtomFeed resultFeed = service.Batch(batchFeed, new Uri(baseFeed.Batch));

To verify that the operations were successfull, you need to iterate over the returned entries:

foreach (AtomEntry resultEntry in resultFeed.Entries ) { GDataBatchEntry data = resultEntry.BatchData; switch (data.Stutus.Code) { case 200:.... } }

For more details check the online documentation for batch and look into the unittests/gbase.cs file.