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Cosmos DB¶

Use Cosmos DB bindings and SDK patterns from isolated worker functions.

flowchart TD
    A[Trigger] --> B[Function]
    B --> C[Binding or SDK]
    C --> D[Azure service]

Topic/Command Groups¶

Cosmos DB trigger/input bindings¶

[Function("CosmosReader")]
public void CosmosReader(
    [CosmosDBTrigger(
        databaseName: "appdb",
        containerName: "orders",
        Connection = "CosmosConnection",
        LeaseContainerName = "leases")] string[] documents)
{
}

Cosmos DB output binding¶

[Function("WriteOrder")]
[CosmosDBOutput("appdb", "orders", Connection = "CosmosConnection")]
public Order WriteOrder([HttpTrigger(AuthorizationLevel.Function, "post", Route = "orders")] HttpRequestData req)
{
    return new Order { Id = Guid.NewGuid().ToString(), Status = "created" };
}

Review Matrix¶

Review area	Page-specific check
Scope	Confirm the guidance applies to Cosmos DB.
Source basis	Validate the recommendation against the Microsoft Learn sources in this page.
Evidence	Capture command output, portal state, metrics, logs, or screenshots before treating the result as proven.

See Also¶

Sources¶