如何使用背景工作器?我知道它有三种方法。在我的程序中,我有一个发送消息的方法。通常是很晚,程序有时根本不发送信息,以响应按钮按下。有时,与我所期望的相比,它已经晚到了5秒,程序冻结了。我想用BackgroundWorker按预期发送消息,并允许程序在任何时候正常运行。我有在按钮处理程序中发送消息的代码。现在我该把这个等价的代码放哪儿呢?我希望所有这一切仍由按钮按下处理。这是合适的处理程序吗?backgroundWorker1.RunWorkerAsync();在以下方面:private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e) {}我要把我的代码放到按钮处理程序中?在此之前:carga.progressBar1.Minimum = 0;carga.progressBar1.Maximum = 100;Carga是我使用ProgressBar的另一种形式。在这种情况下,我如何使用背景工作器?
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public Form1(){ InitializeComponent(); backgroundWorker1.DoWork += backgroundWorker1_DoWork; backgroundWorker1.ProgressChanged += backgroundWorker1_ProgressChanged; backgroundWorker1.RunWorkerCompleted += backgroundWorker1_RunWorkerCompleted; //Tell the user how the process went backgroundWorker1.WorkerReportsProgress = true; backgroundWorker1.WorkerSupportsCancellation = true; //Allow for the process to be cancelled} //Start Processprivate void button1_Click(object sender, EventArgs e){ backgroundWorker1.RunWorkerAsync();}//Cancel Processprivate void button2_Click(object sender, EventArgs e){ //Check if background worker is doing anything and send a cancellation if it is if (backgroundWorker1.IsBusy) { backgroundWorker1.CancelAsync(); }}private void backgroundWorker1_DoWork(object sender, System.ComponentModel.DoWorkEventArgs e){ for (int i = 0; i < 100; i++) { Thread.Sleep(1000); backgroundWorker1.ReportProgress(i); //Check if there is a request to cancel the process if (backgroundWorker1.CancellationPending) { e.Cancel = true; backgroundWorker1.ReportProgress(0); return; } } //If the process exits the loop, ensure that progress is set to 100% //Remember in the loop we set i < 100 so in theory the process will complete at 99% backgroundWorker1.ReportProgress(100);}private void backgroundWorker1_ProgressChanged(object sender, System.ComponentModel.ProgressChangedEventArgs e){ progressBar1.Value = e.ProgressPercentage;}private void backgroundWorker1_RunWorkerCompleted(object sender, System.ComponentModel.RunWorkerCompletedEventArgs e){ if (e.Cancelled) { lblStatus.Text = "Process was cancelled"; } else if (e.Error != null) { lblStatus.Text = "There was an error running the process. The thread aborted"; } else { lblStatus.Text = "Process was completed"; }}
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