Guide to drop documents in Azure documentDB (new CosmosDB)

Several months ago, I started managing a non-relational DocumentDB database (new CosmosDB) on Azure. I had to delete some records, then I encountered some difficulties. The use of partitions and selecting the correct partition by ID was very important. So, I created the following Windows console application sample with c# which collects the document IDs based on a query and then deletes the documents for these IDs.

Initially we install the libraries Microsoft.Azure.DocumentDB and Newtonsoft.Json.

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In order to connect the DocumentDB database with the Windows console application, you need the credentials (uri + primary key), which are on the “keys” Tab on Azure.

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Next, you initialize the documentDB uri, primary key, name of the collection and the name of the database.

private const string connectionEndpointUri ="https://dropdocuments.documents.azure.com:443/";
private const string primaryKey = "Kl9XbLDeSPjcmoJra7tKkHblfamvhmxFdzcw7LN3Pl44ENCdBYHax6krgmqGgqfpRbUEj73Rml0YAOR2ALJBZg==";
private static string databaseId = @"DatabaseName";
private static string collectionId = @"CollectionName";
private Uri collectionLink = UriFactory.CreateDocumentCollectionUri(databaseId, collectionId);

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