多次下载同一个文件。 WebClient中发生超时异常

Question

使用WebClient下载文件时。它第一次下载但第二次下载时发生超时异常。

文件名在标题中contentDisposition使用webClient.OpenRead(filePath);然后使用此名称保存。下面显示了使用代码

using (WebClient webClient = new WebClient())
{
    try
    {
        webClient.OpenRead(filePath);
        string cpString = webClient.ResponseHeaders["Content-Disposition"];
        ContentDisposition contentDisposition = new ContentDisposition(cpString);
        string filename = contentDisposition.FileName;
        localPath = Path.Combine(fullpath, filename);
        if (File.Exists(localPath))
        {
            int count = 1;

            string fileNameOnly = Path.GetFileNameWithoutExtension(localPath);
            string extension = Path.GetExtension(localPath);
            string path = Path.GetDirectoryName(localPath);
            string newlocalPath = localPath;

            while (File.Exists(newFullPath))
            {
                string tempFileName = string.Format("{0}({1})", fileNameOnly, count++);
                newlocalPath= Path.Combine(path, tempFileName + extension);
            }
           webClient.DownloadFile(filePath, newlocalPath);
        }
        else webClient.DownloadFile(filePath, localPath);
    }
    catch (Exception)
    {
        throw;
    }
    finally
    {
        if (webClient != null)
        {
            webClient.Dispose();
        }
    }
}

这是一种正确的方法吗？如果您为此提出解决方案，我将不胜感激。