復(fù)制文件夾(異步)時(shí),我需要顯示進(jìn)度.
我可以使用單個(gè)文件副本來執(zhí)行此操作,但不能使用文件夾來執(zhí)行此操作…我只想像Windows一樣顯示整個(gè)副本的進(jìn)度.

這是我復(fù)制文件夾的代碼：

private void DirectoryCopy(string sourceDirName, string destDirName, bool copySubDirs, CancellationToken cancellationToken)
{
    cancellationToken.ThrowIfCancellationRequested();
    DirectoryInfo dir = new DirectoryInfo(sourceDirName);

    DirectoryInfo[] dirs = dir.GetDirectories();
    // If the destination directory doesn't exist, create it.
    if (!Directory.Exists(destDirName))
    {
        Directory.CreateDirectory(destDirName);
    }

    if (!Directory.Exists(destDirName))
    {
        throw new DirectoryNotFoundException(
            "Source directory does not exist or could not be found: "
              sourceDirName);
    }

    // Get the files in the directory and copy them to the new location.
    FileInfo[] files = dir.GetFiles();
    foreach (FileInfo file in files)
    {
        string temppath = Path.Combine(destDirName, file.Name);
        file.CopyTo(temppath, false);
    }

    // If copying subdirectories, copy them and their contents to new location.
    if (copySubDirs)
    {
        foreach (DirectoryInfo subdir in dirs)
        {
            string temppath = Path.Combine(destDirName, subdir.Name);
            DirectoryCopy(subdir.FullName, temppath, copySubDirs, cts.Token);
        }
    }
}

然后通過一個(gè)按鈕調(diào)用它：

await Task.Run(() => DirectoryCopy(
    srcFolder, 
    @"\\"   hostname   @"\C$\"   destFolder   @"\", 
    true, 
    cts.Token
));

我該如何實(shí)現(xiàn)？

告訴我有關(guān)我的問題的信息不足,我將更新我的帖子.

解決方法:

您可以使用IProgress接口.

例如,

private async Task DirectoryCopy(string sourceDirName, string destDirName, bool copySubDirs, CancellationToken cancellationToken,IProgress<int> progress)
{
    // Do work
    var percentageProgress = 0;
    // percentageProgress = Calculate percentage
    progress.Report(percentageProgress);
}

在客戶端(相信您的按鈕單擊事件),

var progressIndicator = new Progress<int>(ShowProgress);
await UploadPicturesAsync(sourceDirName,destDirName,copySubDirs,token,progressIndicator);

其中ShowProgress定義為

void ShowProgress(int value)
{
// Update UI
}

您也可以在IProgress here和here上閱讀更多內(nèi)容