進度欄未在C＃中刷新

Question

我有一個問題，我使用backgroundWorker1.RunWorkerAsync()在button_click方法，以及使用backgroundWorker1_DoWork() backgroundWorker1_ProgressChanged()事件也，所有的事件觸發，但進度條不清爽。 這是我的代碼：

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();
        }

有人可以幫忙嗎.....

Answer 1

檢查backgroundWorker1.WorkerReportsProgress的值，應將其設置為true。 波紋管工作和測試示例：

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

我已經嘗試過復制您的問題，但最終效果良好。 確保backgroundWorker1.ReposrtsProgress設置為True 。 參見下面的代碼：

   '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，我認為您的“過程”應該在DoWork內部。

Answer 3

您不應該將文件移動邏輯移到DoWork部分嗎？ BackgroundWorker的想法是從UI線程中刪除繁重的工作。