How to execute an Azure table storage query async? client version 4.0.1

Question

Want to execute queries Async on Azure Storage Client Version 4.0.1

There is NO method ExecuteQueryAsync()..

I am missing something? Should we continue to use th

Answer 1

When table query contains take clause specified solution will return more items than requested by query. Small change of while expression will solve that problem.

public static async Task> ExecuteQueryAsync(this CloudTable table, TableQuery query, CancellationToken ct = default(CancellationToken), Action> onProgress = null) where T : ITableEntity, new()
{
    var runningQuery = new TableQuery()
    {
        FilterString = query.FilterString,
        SelectColumns = query.SelectColumns
    };

    var items = new List();
    TableContinuationToken token = null;

    do
    {
        runningQuery.TakeCount = query.TakeCount - items.Count;

        TableQuerySegment seg = await table.ExecuteQuerySegmentedAsync(runningQuery, token);
        token = seg.ContinuationToken;
        items.AddRange(seg);
        if (onProgress != null) onProgress(items);

    } while (token != null && !ct.IsCancellationRequested && (query.TakeCount == null || items.Count < query.TakeCount.Value));

    return items;
}

EDITED: Thanks to a suggestion from PaulG, corrected the issue with result count when query contains take clause and ExecuteQuerySegmentedAsync returns items in several passes.