c#不支持一个STA线程上针对多个句柄的WaitAll

qq_35169207 2017-05-03 05:15:45

代码如下，在 WaitHandle.WaitAll(doneEvents);时报错。用的是WPF写的项目，整个解决方案中国找不到用STAThread修饰的地方。大神还请指教

  public bool DoDownLoad(List<DownloadFile> downloadFiles)

        {



            try

            {

                //cpu核心数为线程数  

                int processorCount = Environment.ProcessorCount>=5? Environment.ProcessorCount:5;

                ManualResetEvent[] startEvents = new ManualResetEvent[processorCount];

                ManualResetEvent[] doneEvents = new ManualResetEvent[processorCount];

                ThreadParam[] Params = new ThreadParam[processorCount];

                Thread[] threads = new Thread[processorCount];

                for (int i = 0; i < processorCount; ++i)

                {

                    startEvents[i] = new ManualResetEvent(false);

                    doneEvents[i] = new ManualResetEvent(false);

                    Params[i] = new ThreadParam

                    {

                        MId = i, //线程ID  

                        MStartEvent = startEvents[i], //启动下载事件  

                        MDoneEvent = doneEvents[i] //完成下载事件  

                    };

                    threads[i] = new Thread(new ParameterizedThreadStart(AsyncDownloadFile));

                    threads[i].Start(Params[i]);

                }



                //始终只有Environment.ProcessorCount多个线程在下载一个文件,你可以根据实际情况修改  

                for (int i = 0; i < downloadFiles.Count; ++i)

                {

                    DownloadFile f = downloadFiles[i];



                    //分配线程下载任务  

                    CutFile(Params, f.MFileSize);



                    for (int j = 0; j < processorCount; ++j)

                    {

                        Params[j].MUrl = f.MUrl;//文件下载地址

                        Params[j].MFileName = f.MFileName;//文件名称

                        Params[j].MDoneEvent.Reset(); //清空下载完成  

                        Params[j].MStartEvent.Set(); //启动线程  

                    }

                    //等待下载中...  

                    WaitHandle.WaitAll(doneEvents);



                    //将临时文件合并为完整文件  

                    MergeFile(Params);

                }

                return true;

            }

            catch (Exception err)

            {

                return false;

            }

...全文

616 2 打赏收藏转发到动态举报

写回复

用AI写文章

2 条回复

切换为时间正序

请发表友善的回复…

发表回复

xuggzu 2017-05-04

打赏
举报

wpf不允许修改sta，楼主可以建个线程再去调用wait。

郑州高新区WPF小王子 2017-05-03

打赏
举报

在WPF 项目中的App.g.i.cs 中： [System.STAThreadAttribute()]


 /// <summary>
        /// Application Entry Point.
        /// </summary>
        [System.STAThreadAttribute()]
        [System.Diagnostics.DebuggerNonUserCodeAttribute()]
        [System.CodeDom.Compiler.GeneratedCodeAttribute("PresentationBuildTasks", "4.0.0.0")]
        public static void Main() {
            WpfApplication1.App app = new WpfApplication1.App();
            app.InitializeComponent();
            app.Run();
        }