Question

我遇到问题，我在button_click方法中使用backgroundWorker1.RunWorkerAsync()，并且还使用backgroundWorker1_DoWork()，backgroundWorker1_ProgressChanged()事件，所有事件都在触发，但进度条没有刷新。这是我的代码：

private void btnMove_Click(object sender, EventArgs e)
        {

            try
           {

               backgroundWorker1.RunWorkerAsync();

                for (int i = 0; i < gdFiles.Rows.Count - 1; i++)
                {
                    // my process
                 }

              catch (Exception ex)
            {

            }

        }
     }

事件是

private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
        {
            for (int i = 1; i <= 100; i++)
            {

                backgroundWorker1.ReportProgress(i);
                Thread.Sleep(100);
            }
        }


        private void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e)
        {
            progressBar1.Value = e.ProgressPercentage;
            progressBar1.Refresh();
        }

任何人都可以帮忙吗.....

Answer 1

检查backgroundWorker1.WorkerReportsProgress的值，应将其设置为true。 Bellow工作和测试的例子：

public partial class Form1 : Form
{
    private BackgroundWorker bw = new BackgroundWorker();

    public Form1()
    {
        InitializeComponent();

        bw.WorkerReportsProgress = true;
        bw.WorkerSupportsCancellation = true;
        bw.DoWork += new DoWorkEventHandler(bw_DoWork);
        bw.ProgressChanged += new ProgressChangedEventHandler(bw_ProgressChanged);
        bw.RunWorkerCompleted += new RunWorkerCompletedEventHandler(bw_RunWorkerCompleted);
    }

    void bw_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
    {

    }

    void bw_ProgressChanged(object sender, ProgressChangedEventArgs e)
    {
        progressBar1.Value = e.ProgressPercentage;
    }

    void bw_DoWork(object sender, DoWorkEventArgs e)
    {
        for (int i = 1; i <= 100; i++)
        {

            bw.ReportProgress(i);
            Thread.Sleep(100);
        }
    }

    private void button1_Click(object sender, EventArgs e)
    {
        bw.RunWorkerAsync();
    }
}

Answer 2

我试图复制你的问题，但我的工作正常。确保backgroundWorker1.ReposrtsProgress设置为 True 。请参阅以下代码：

   'private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
    {
        for (int i = 1; i <= 100; i++)
        {

            backgroundWorker1.ReportProgress(i);
            Thread.Sleep(100);
        }
    }

    private void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e)
    {
        progressBar1.Value = e.ProgressPercentage;
        progressBar1.Refresh();
    }

    private void button1_Click(object sender, EventArgs e)
    {
        backgroundWorker1.RunWorkerAsync();
    }`

另外，我认为你的“过程”应该在DoWork中。

Answer 3

您不应该将文件移动逻辑移动到DoWork部分吗？ BackgroundWorker的想法是从UI线程中删除繁重的东西。

进度条没有刷新c＃

3 个答案: