C#：多线程并行执行任务并控制并行数量_c# 控制同时执行的task数量-优快云博客

本文链接：https://blog.youkuaiyun.com/wucong60/article/details/85325641

本文介绍如何使用MSFT.ParallelExtensionsExtras库进行并行任务调度，包括下载安装方法及示例代码，展示了如何通过LimitedConcurrencyLevelTaskScheduler限制并发级别执行多个在线查询。

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点击这里下载，或者使用nuget下载

Install-Package MSFT.ParallelExtensionsExtras -Version 1.2.0

下载完成后，下面是用法：

        public IActionResult GetPastData()
        {
            var list = _jsonSerializeHelper.Deserialize<IEnumerable<CustomStrategy>>("customStrategy.json").GetAwaiter().GetResult().ToList();

            LimitedConcurrencyLevelTaskScheduler lcts = new LimitedConcurrencyLevelTaskScheduler(10);
            TaskFactory factory = new TaskFactory(lcts);

            var list1 = new List<string>() {
                //"2018-01",
                //"2018-02",
                //"2018-03",
                //"2018-04",
                //"2018-05",
                //"2018-06",
                //"2018-07",
                //"2018-08",
                //"2018-09",
                "2018-10",
                //"2018-11",
            }.SelectMany(t => list.Select(strategy => new CustomOnlineQueryCondition()
            {
                BeginDate = t,
                EndDate = t,
                Con1 = "CODE_TS",
                Context1 = string.Join(",", strategy.Codes),
                Currency = strategy.Currency,
                I_E_Flag = strategy.I_E_Flag,
                Con2 = strategy.Con2,
                Context2 = strategy.Context2,
            })).ToList();

            //var task = list1.Select(x => _customOnlineQueryHtmlHelper.Execute(x)).ToList();



            var taskList = new List<Task>();

            foreach (var i in list1)
            {
                var task = factory.StartNew(() =>
                  {
                      _customOnlineQueryHtmlHelper.Execute(i);
                      Console.WriteLine("Current ThreadId {0}", Thread.CurrentThread.ManagedThreadId);
                  });
                taskList.Add(task);
            }

            Task.WaitAll(taskList.ToArray());

            return Json(list.ToArray());
        }