使用DotNetZip 1.9無法將其讀取為zip文件

Question

我正在使用一個應用程序，它將從服務器上下載.zip文件並在使用DotNetZip 1.9下載完成后將其解壓縮。

該應用程序正在正確下載zip文件，但是當它進入讀取.zip文件的部分時，將引發異常“無法將其作為zip文件讀取”（位於http://pastebin.com/NTrtMgR9的完整異常）。

是什么讓我失望，甚至引發異常，文件仍正確解壓縮...

這是我的資料來源：

private void btnDownload_Click(object sender, EventArgs e)
{
    if (!Directory.Exists(HardCorpsPath))
    {
        //MessageBox.Show("Downloading HardCorps Mod Pack (Full)", "Downloading", MessageBoxButtons.OK, MessageBoxIcon.Information);
        zipFileName = "HardCorps";

        HCDownloadURL = String.Format("http://www.survivaloperations.net/client/hardcorps/{0}.zip", zipFileName);
        HCZipPath = Path.Combine(Arma2OAPath, @"HardCorps.zip");

        WebClient Download_Client = new WebClient();//Declaring the webclient as Download_Client
        Download_Client.DownloadFileCompleted += new AsyncCompletedEventHandler(Completed);//the event handler
        Download_Client.DownloadProgressChanged += new DownloadProgressChangedEventHandler(ProgressChanged);// " "
        Download_Client.DownloadFileAsync(new Uri(HCDownloadURL.Trim().ToString()), HCZipPath);// " "

        //extract 
        using (var zipFile = ZipFile.Read(HCZipPath))
        {
            zipFile.ExtractAll(Arma2OAPath, ExtractExistingFileAction.OverwriteSilently);
        }
    }
    else
    {
        MessageBox.Show("Directory Validated!");
        //Read users HardCorpsPath\version.txt and compare to server version.txt
        //if server version > user version, download patch.zip where "patch" == the number version of the server's version.txt (ex: 1001.zip)
        //On download complete, extract to HardCorpsPath and overwrite silently
    }
}//close Download Button

和我的ProgressChanged / Completed方法：

private void ProgressChanged(object sender, DownloadProgressChangedEventArgs e)
{
    pbDownloader.Value = e.ProgressPercentage;//setting the progressbar value as downloadprogress
}

private void Completed(object sender, AsyncCompletedEventArgs e)
{
    using (var zipFile = ZipFile.Read(String.Format(HCZipPath)))
    {
        zipFile.ExtractAll(Arma2OAPath, ExtractExistingFileAction.OverwriteSilently);
    }

    MessageBox.Show("Downloading Successful ", "Download_Completed", MessageBoxButtons.OK, MessageBoxIcon.Information);//just a messagebox          
    pbDownloader.Value = (0);//resetting the progressbar  
}

HCZipPath是一個字符串變量（如果有任何區別）

Answer 1

在btnDownload_Click方法中，您嘗試在下載文件之前提取文件。 您調用Download_Client.DownloadFileAsync開始下載，並且您已經正確設置了DownloadFileCompleted事件的處理程序（嘗試再次進行提取）。 取出DownloadFileAsync方法調用下面的代碼（以防止發生異常）。 正在提取文件，因為您是使用Completed方法（這是正確的方法）提取文件的。