创建一个集合（.NET）

一个集合可以通过使用 DocumentClient 类的 CreateDocumentCollectionAsync 方法来创建。集合是 JSON 文档和关联的 JavaScript 应用程序逻辑的容器。

async Task CreateCollection(DocumentClient client)
{
    var databaseName = "<your database name>";
    var collectionName = "<your collection name>";

    DocumentCollection collectionInfo = new DocumentCollection();
    collectionInfo.Id = collectionName;

    // Configure collections for maximum query flexibility including string range queries.
    collectionInfo.IndexingPolicy = new IndexingPolicy(new RangeIndex(DataType.String) { Precision = -1 });

    // Here we create a collection with 400 RU/s.
    await client.CreateDocumentCollectionAsync(UriFactory.CreateDatabaseUri(databaseName),
        collectionInfo, new RequestOptions { OfferThroughput = 400 });
}

或者你可以检查集合是否存在并在必要时创建它：

async Task CreateDocumentCollectionIfNotExists(DocumentClient client)
{
    var databaseName = "<your database name>";
    var collectionName = "<your collection name>";
    try
    {
        await client.ReadDocumentCollectionAsync(UriFactory.CreateDocumentCollectionUri(databaseName, collectionName));
    }
    catch (DocumentClientException e)
    {
        // If the document collection does not exist, create a new collection
        if (e.StatusCode == HttpStatusCode.NotFound)
        {
            DocumentCollection collectionInfo = new DocumentCollection();
            collectionInfo.Id = collectionName;

            // Configure collections for maximum query flexibility including string range queries.
            collectionInfo.IndexingPolicy = new IndexingPolicy(new RangeIndex(DataType.String) { Precision = -1 });

            // Here we create a collection with 400 RU/s.
            await client.CreateDocumentCollectionAsync(UriFactory.CreateDatabaseUri(databaseName),
                collectionInfo, new RequestOptions { OfferThroughput = 400 });
        }
        else
        {
            // Rethrow
            throw;
        }
    }
}