c# - 对多个任务使用 Task.WhenAll 时在 foo.Start() 上出错

Question

我收到此错误消息“可能无法在 Promise 风格的任务上调用 Start。”所以我注释掉了 .Start() .我再次尝试并收到此错误“可能无法在已完成的任务上调用开始。”那么我该怎么做才能使这项工作正常进行呢？

                var dashboardDailyAgeAnalysis = DailyAgeAnalysesTotalRowsCountAsync(v.BookItOutAccountId, v.ClientMgntAccountNumber, yesterdayDate);
                var dashboardDailyBalance = DailyBalanceTotalRowsCountAsync(v.BookItOutAccountId, v.ClientMgntAccountNumber, yesterdayDate);
                var dashboardDailyInventory = DailyInventoryTotalRowsCountAsync(v.BookItOutAccountId, v.ClientMgntAccountNumber, yesterdayDate);

               // dashboardDailyAgeAnalysis.Start();
               // dashboardDailyBalance.Start();
               // dashboardDailyInventory.Start();

                await Task.WhenAll(
                    dashboardDailyAgeAnalysis, dashboardDailyBalance, dashboardDailyInventory
                );

                // Do something with these results.
                var result1 = dashboardDailyAgeAnalysis.Result;
                var result2 = dashboardDailyBalance.Result;
                var result3 = dashboardDailyInventory.Result;

Answer 1

        await Task.WhenAll(
            dashboardDailyAgeAnalysis, dashboardDailyBalance, dashboardDailyInventory
        );

        // Do something with these results.
        var result1 = await dashboardDailyAgeAnalysis;
        var result2 = await dashboardDailyBalance;
        var result3 = await dashboardDailyInventory;