Container.ReadManyItemsAsync<T> Method

Reference

Definition

Namespace:: Microsoft.Azure.Cosmos

Assembly:: Microsoft.Azure.Cosmos.Client.dll

Package:: Microsoft.Azure.Cosmos v3.39.0

Source:: Container.cs

Important

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Reads multiple items from a container using Id and PartitionKey values.

public abstract System.Threading.Tasks.Task<Microsoft.Azure.Cosmos.FeedResponse<T>> ReadManyItemsAsync<T> (System.Collections.Generic.IReadOnlyList<(string id, Microsoft.Azure.Cosmos.PartitionKey partitionKey)> items, Microsoft.Azure.Cosmos.ReadManyRequestOptions readManyRequestOptions = default, System.Threading.CancellationToken cancellationToken = default);

abstract member ReadManyItemsAsync : System.Collections.Generic.IReadOnlyList<ValueTuple<string, Microsoft.Azure.Cosmos.PartitionKey>> * Microsoft.Azure.Cosmos.ReadManyRequestOptions * System.Threading.CancellationToken -> System.Threading.Tasks.Task<Microsoft.Azure.Cosmos.FeedResponse<'T>>

Public MustOverride Function ReadManyItemsAsync(Of T) (items As IReadOnlyList(Of ValueTuple(Of String, PartitionKey)), Optional readManyRequestOptions As ReadManyRequestOptions = Nothing, Optional cancellationToken As CancellationToken = Nothing) As Task(Of FeedResponse(Of T))

Type Parameters

T

Parameters

items: IReadOnlyList<ValueTuple<String,PartitionKey>>

List of item.Id and PartitionKey

readManyRequestOptions: ReadManyRequestOptions

Request Options for ReadMany Operation

cancellationToken: CancellationToken

(Optional) CancellationToken representing request cancellation.

Returns

Task<FeedResponse<T>>

A Task containing a FeedResponse<T> which wraps the typed items.

Examples

public class ToDoActivity{
    public string id {get; set;}
    public string status {get; set;}
}

IReadOnlyList<(string, PartitionKey)> itemList = new List<(string, PartitionKey)>
{
    ("Id1", new PartitionKey("pkValue1")),
    ("Id2", new PartitionKey("pkValue2")),
    ("Id3", new PartitionKey("pkValue3"))
};

FeedResponse<ToDoActivity> feedResponse = this.Container.ReadManyItemsAsync<ToDoActivity>(itemList);

Remarks

ReadManyItemsAsync<T>(IReadOnlyList<ValueTuple<String,PartitionKey>>, ReadManyRequestOptions, CancellationToken) is meant to perform better latency-wise than a query with IN statements to fetch a large number of independent items.

Applies to

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