进度栏未在C＃中刷新

Question

我有一个问题，我使用backgroundWorker1.RunWorkerAsync()在button_click方法，以及使用backgroundWorker1_DoWork() backgroundWorker1_ProgressChanged()事件也，所有的事件触发，但进度条不清爽。 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();
        }

有人可以帮忙吗.....

Answer 1

检查backgroundWorker1.WorkerReportsProgress的值，应将其设置为true。 波纹管工作和测试示例：

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

我已经尝试过复制您的问题，但最终效果良好。 确保backgroundWorker1.ReposrtsProgress设置为True 。 参见下面的代码：

   '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，我认为您的“过程”应该在DoWork内部。

Answer 3

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