使用BackgroundWorker時，出現(xiàn)ProgressChanged延遲的現(xiàn)象，即我在西面代碼的Completed事件中拋出完成時的messageBox，但是因為ProgressChanged的延遲，我的ProgressBar進度條還沒滿就彈出了對話框，然后progressBar才滿……這問題請幫我分析下。 雖說是AsyncOperation.Post()插入消息會延遲，但是ProgressChanged消息是在Completed消息之前插入的啊，至少執(zhí)行上應(yīng)該保持隊列去執(zhí)行消息吧???? 代碼如下： View Code public partial class BackgroundWorker_Test : Form { private BackgroundWorker worker2 = null; public BackgroundWorker_Test() { InitializeComponent(); worker2 = new BackgroundWorker(); worker2.DoWork += backgroundWorker2_DoWork; worker2.ProgressChanged += backgroundWorker2_ProgressChanged; worker2.RunWorkerCompleted += RunWorkerCompleted; worker2.WorkerSupportsCancellation = true; worker2.WorkerReportsProgress = true; } private void btn_Cancel_Click(object sender, EventArgs e) { if (worker2.IsBusy) { worker2.CancelAsync(); } } private void btn_Start_Click(object sender, EventArgs e) { if (!worker2.IsBusy) { this.progressBar1.Value = 0; worker2.RunWorkerAsync(); } else { MessageBox.Show("正在執(zhí)行操作，請稍后"); } } private void backgroundWorker2_DoWork(object sender, DoWorkEventArgs e) { BackgroundWorker worker2 = sender as BackgroundWorker; int sum = 0; try { for (int i = 1; i