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扩展方法中的Azure存储表ExecuteQuerySegmentedAsync调用错误

azure-table-storage azure-storage asp.net-core azure c#

1

John Donnelly · 技术社区 · 9 年前

下面的扩展方法无法在我的ASP中编译。NETCore项目和VisualStudio将ExecuteQuerySegmentedAsync方法作为问题重点。错误(代码下面)引用了我不想要的方法签名。我想要这个 here .

internal static class CloudTableExtensions
{
        public static async Task<IList<DynamicTableEntity>> ExecuteQueryAsync(this CloudTable table,
            TableQuery query, CancellationToken cancellationToken = default(CancellationToken))
    {
        var items = new List<DynamicTableEntity>();
        TableContinuationToken token = null;
        do
        {
            var seg = await table.ExecuteQuerySegmentedAsync(query, token, cancellationToken);

            token = seg.ContinuationToken;
            items.AddRange(seg);


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


        return items;
    }
}

错误为: Error CS0411 The type arguments for method 'CloudTable.ExecuteQuerySegmentedAsync<T, TResult>(TableQuery<T>, EntityResolver<TResult>, TableContinuationToken)' cannot be inferred from the usage. Try specifying the type arguments explicitly.

1 回复 | 直到 9 年前

1

2

Thomas 9 年前

这个 WindowsAzure.Storage 7.1.3-Preview ASP的nuget包。NET核心1.0.0 不包含 ExecuteQuerySegmentedAsync 函数。也许你应该在 github repo .

否则,如果需要传递取消令牌,可以使用 this :

internal static class CloudTableExtensions
{
    public static async Task<IList<DynamicTableEntity>> ExecuteQueryAsync(this CloudTable table,
        TableQuery query, CancellationToken cancellationToken = default(CancellationToken))
    {
        var items = new List<DynamicTableEntity>();
        TableContinuationToken token = null;
        do
        {
            var seg =
                await
                    table.ExecuteQuerySegmentedAsync(query, token, new TableRequestOptions(), new OperationContext(),
                        cancellationToken);

            token = seg.ContinuationToken;
            items.AddRange(seg);


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


        return items;
    }
}