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ProgressForm progressForm = new ProgressForm();
progressForm.Show(); //点击按钮弹出progressForm
worker = new BackgroundWorker();
worker.WorkerReportsProgress = true;
worker.WorkerSupportsCancellation = true;
worker.DoWork += new DoWorkEventHandler(worker_DoWork); //加载事件
worker.RunWorkerCompleted += new RunWorkerCompletedEventHandler(worker_RunWorkerCompleted);
worker.RunWorkerCompleted += new RunWorkerCompletedEventHandler(progressForm.OnProcessCompleted);
worker.RunWorkerAsync();