Question

我在多个线程上调用特定函数，如下所示：

int q = 0;
        for (int j = 0; j < number; j++)
        {
            int copy = q;
            int copy1 = j;
            if (!display_status[copy1].Equals("NO") && (selection == "ALL" || (selection == "ALL-LAE" && license[copy1] != "") || (selection == "ALL-NON LAE" && license[copy1] == "") || (selection == "AVIONICS -ALL" && trade[copy1] == "Avionics") || (selection == "AVIONICS-NON LAE" && trade[copy1] == "Avionics" && license[copy1] == "") || (selection == "AVIONICS-LAE" && trade[copy1] == "Avionics" && license[copy1] != "") || (selection == "AIRFRAME-ALL" && trade[copy1] == "Airframes") || (selection == "AIRFRAME-NON LAE" && trade[j] == "Airframes" && license[j] == "") || (selection == "AIRFRAME-LAE" && trade[j] == "Airframes" && license[j] != "")))
            {
                int numberofprojects = numberc;
                string[] nameofproj = listc[0].ToArray();                    
                string[] name = list[0].ToArray();//list of manpower names
                string man_name = name[copy1];//Name of manpower
                List<string>[] lista = new List<string>[5];
                string[] status = listc[13].ToArray();
                thread[copy] = new Thread(() => {new_value[copy]=graph1threader(man_name,numberofprojects, nameofproj, status);});
                thread[copy].Start();
                q++;

            }
        }

graphthreader1（）似乎没有返回任何值，因为即使在调用函数之后，new_value的所有元素都保持值0。可能是什么原因？这个问题有一个简单的解决方案吗？

Answer 1

最可能的原因是graph1threader还没有完成，你可以通过调用thread[copy].Join()解决这个问题的一种方法，但很可能这会破坏使用线程的目的，另一种方式将通过仅在循环结束时加入第一个线程，但这取决于您希望用代码实现的目标。

在接受参数和返回值的方法上使用Thread.Start（）

1 个答案: