Question

我想在我的列表中进行异步循环，并在paraller中执行方法Execute。我很想知道如何实现这一目标。

这是我的清单：

public class MakeRequest
        {   
            public string file_READYTOTEST { get; set; }
            public string file_DONEFILE { get; set; }
            public string Inventory_name { get; set; }
            public string  TimeOutFP { get; set; }
            public Server server { get; set; }

        }

在最后我有很多元素被其他foreach添加到这个列表

IList<MakeRequest> makeRequestList;
    makeRequestList.Add(new MakeRequest { file_DONEFILE = DONEFILE, file_READYTOTEST = READYTOTEST, Inventory_name = file, server = SAMaddress, TimeOutFP = IO.TimeOutFP } );

并且拥有该对象列表我需要进行一些计算

说明：

file_DONEFILE = final file name to be saved (string)
file_READYTOTEST = file which will be opened to do some operation then result save to file_DONEFILE (string)
Inventory_name = my inventory item (string)
server = server ip (string)
Timeout = path of file (string)

当我在同步中执行时，我正在执行这样的操作：

 foreach (MakeRequest item in makerequest)
                {
                    Execute(item.file_READYTOTEST, item.file_DONEFILE, item.Inventory_name, IO.TimeOutFP, item.server);
                }

这是我的方法：

//Create a soap webrequest to [Url]
        public static HttpWebRequest CreateWebRequest(string ServerIP)
        {
            HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create(ServerIP);
            webRequest.Headers.Add(@"SOAP:Action");
            webRequest.ContentType = "text/xml;charset=\"utf-8\"";
            webRequest.Accept = "text/xml";
            webRequest.Method = "POST";
            return webRequest;
        }

        public static void Execute(string xmlFileRequest, string xmlFileResult, string InventoryElement, string TimeOutFile, Server server)
        {
            HttpWebRequest request = CreateWebRequest(server.ServerIP);
            var soapEnvelopeXml = new XmlDocument();
            soapEnvelopeXml.Load(xmlFileRequest);
            using (Stream stream = request.GetRequestStream())
            {
                soapEnvelopeXml.Save(stream);
            }
            try
            {
                using (WebResponse response = request.GetResponse())

                {
                    using (var rd = new StreamReader(response.GetResponseStream()))
                    {
                        string soapResult = rd.ReadToEnd();

                        var xdoc = new XmlDocument();
                        xdoc.LoadXml(soapResult);
                        xdoc.Save(xmlFileResult);
                    }
                }
            }
            catch (WebException e)
            {
                using (StreamWriter sw = File.AppendText(TimeOutFile))
                {
                    sw.WriteLine(InventoryElement);
                }
            }
        }

你能帮我解决一下我如何让它异步。

更新NR 2关于进一步讨论的主题：

    foreach (MakeRequest item in makeRequestList)
                {
    //1) no definition for run ...
                    Task.Run(() => Execute(item.file_READYTOTEST, item.file_DONEFILE, item.Inventory_name, IO.TimeOutFP, item.server));
                }

    //2. I want to wait on all threads to end before Console.Writeline("All...
                Task.WaitAll(task);

    Console.Writeline("All Tasks have been done")
    Console.Readline()

//other piece of code:
    //3. Catch case: (where to define locker?)

        }
                    catch (WebException e)
                    {
        lock(locker)
        {
                        using (StreamWriter sw = File.AppendText(TimeOutFile))
                        {
                            sw.WriteLine(InventoryElement);
                        }
                    }
        }

更新NR 3关于进一步讨论的主题：

  List<Task> mytasks = new List<Task>();
        foreach (MakeRequest item in makeRequestList)
        {

            Task myFirstTask = Task.Factory.StartNew(() => Execute(item.file_READYTOTEST, item.file_DONEFILE, item.Inventory_name, IO.TimeOutFP, item.server) );
            mytasks.Add(myFirstTask);
        }

        Task.WaitAll(mytasks.ToArray());

Console.writeline("Something");
Console.readline();

Answer 1

您可以使用Task将其设为异步：

foreach (MakeRequest item in makerequest)
{
    Task.Run( () => Execute(item.file_READYTOTEST, item.file_DONEFILE, item.Inventory_name, IO.TimeOutFP, item.server) );
}

Answer 2

如果你的工作框架大于或等于3.5，你可以使用线程类运行到另一个循环。

Thread threadObj = null;
foreach (MakeRequest item in makerequest)
{
    threadObj = new Thread(new ThreadStart(()=>Execute(item.file_READYTOTEST, item.file_DONEFILE, item.Inventory_name, IO.TimeOutFP, item.server) ));
}

静态foreach方法

2 个答案: