使用進度欄復制不起作用

Question

我有點小問題。 我正在嘗試使用狀態欄將表單的內容從A點復制到B的表單。 現在復制可以正常工作，但是狀態欄什么也沒做。任何人都有線索嗎？

public partial class Form4A : Form
{
    public Form4A()
    {
        InitializeComponent();
        OtherSettings();
        BackgroundWorker.RunWorkerAsync(); // Starts wow copying
    }

    private void BackgroundWorker_DoWork(object sender, DoWorkEventArgs e)
    {
        string SourcePath = RegistryRead.ReadOriginalPath();
        string DestinationPath = RegistryRead.ReadNewPath();

        if (!Directory.Exists(SourcePath))
        {
            for (int i = 1; i <= 100; i++)
            {
                //Now Create all of the directories
                foreach (string dirPath in Directory.GetDirectories(SourcePath, "*",
                    SearchOption.AllDirectories))
                    Directory.CreateDirectory(dirPath.Replace(SourcePath, DestinationPath));

                //Copy all the files
                foreach (string newPath in Directory.GetFiles(SourcePath, "*.*",
                    SearchOption.AllDirectories))
                    File.Copy(newPath, newPath.Replace(SourcePath, DestinationPath));


                BackgroundWorker.ReportProgress(i);
            }
        }
    }
    private void backgroundWorker_ProgressChanged(object sender, ProgressChangedEventArgs e)
    {
        // Change the value of the ProgressBar to the BackgroundWorker progress.
        progressBar1.Value = e.ProgressPercentage;
        // Set the text.
        this.Text = e.ProgressPercentage.ToString();
    }

}

Answer 1

您說： if (!Directory.Exists(DestinationPath)) 。 這意味着，如果存在目標路徑，則將永遠不會執行循環。 在測試代​​碼之前，請確保刪除DestinationPath！

編輯：

if (Directory.Exists(SourcePath)) {
    //Now Create all of the directories 
    string[] allDirectories = Directory.GetDirectories(SourcePath, "*", SearchOption.AllDirectories);
    string[] allFiles = Directory.GetFiles(SourcePath, "*.*", SearchOption.AllDirectories);
    int numberOfItems = allDirectories.Length + allFiles.Length;
    int progress = 0;

    foreach (string dirPath in allDirectories) {
        Directory.CreateDirectory(dirPath.Replace(SourcePath, DestinationPath));
        progress++;
        BackgroundWorker.ReportProgress(100 * progress / numberOfItems);
    }

    //Copy all the files 
    foreach (string newPath in allFiles) {
        File.Copy(newPath, newPath.Replace(SourcePath, DestinationPath));
        progress++;
        BackgroundWorker.ReportProgress(100 * progress / numberOfItems);
    }
}