Question

我应该如何知道应用程序是否正在运行或处理某些内容？让我们说我正在尝试将大量数据写入文件，那时应用程序没有响应。我想知道应用程序的当前状态。

Answer 1

使用BackgroundWorker组件处理后台线程中的大数据。通过ProgressChanged活动通知用户进度。

样品：

public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
        backgroundWorker1.WorkerReportsProgress = true;
    }

    private void WriteDataButton_Click(object sender, EventArgs e)
    {
        backgroundWorker1.RunWorkerAsync();
    }

    private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
    {
         for (int i = 1; i <= numberOfIterations; i++)
         {
             // write part of data
             backgroundWorker1.ReportProgress(i * 100 / numberOfIterations);
         }    
    }

    // This event handler updates the progress. 
    private void backgroundWorker1_ProgressChanged(
                object sender, ProgressChangedEventArgs e)
    {
        progressBar1.Value = e.ProgressPercentage;
    }

    // This event handler deals with the results of the background operation. 
    private void backgroundWorker1_RunWorkerCompleted(
                object sender, RunWorkerCompletedEventArgs e)
    {
        MessageBox.Show("Huge data was written");
    }
}

申请是否有效

1 个答案: