c# - 在 asp.net web 表单中获取消息的网页导航被取消

Question

当我将 aspx 页面下载为图像格式时，下载图像中出现以下错误消息，但本地主机每个人都认为只有在上传到实时服务器时才能正常工作，然后下载下载的文件，但内部文件消息不是我的 aspx 数据显示.

网页导航已取消

下面是我下载的带有消息的图片文件

我正在尝试使用 win 窗体 WebBrowser 控件截取网页屏幕，下面是我的代码

下面是将 URL 分配给文本框以供下载的代码

  protected void Page_Load(object sender, EventArgs e)
{

   txtweburl.Text = "http://example.com/dicdownload.aspx?VisitedId=DIC_V00025";

 }

下面是使用线程生成屏幕的代码

  protected void btnscreenshot_click(object sender, EventArgs e)
  {
    //  btnscreenshot.Visible = false;
    allpanels.Visible = true;
    Thread thread = new Thread(GenerateThumbnail);
    thread.SetApartmentState(ApartmentState.STA);
    thread.Start();
    thread.Join();

}

private void GenerateThumbnail()
{
    //  btnscreenshot.Visible = false;
    WebBrowser webrowse = new WebBrowser();
    webrowse.ScrollBarsEnabled = false;
    webrowse.AllowNavigation = true;
    string url = txtweburl.Text.Trim();
    webrowse.Navigate(url);
    webrowse.Width = 1400;
    webrowse.Height = 50000;

    webrowse.DocumentCompleted += webbrowse_DocumentCompleted;
    while (webrowse.ReadyState != WebBrowserReadyState.Complete)
    {
        System.Windows.Forms.Application.DoEvents();
    }
}

在下面的代码中，我在下载删除相同文件后保存图像文件

        private void webbrowse_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
    // btnscreenshot.Visible = false;
    string folderPath = Server.MapPath("~/ImageFiles/");

    WebBrowser webrowse = sender as WebBrowser;
    //Bitmap bitmap = new Bitmap(webrowse.Width, webrowse.Height);

    Bitmap bitmap = new Bitmap(webrowse.Width, webrowse.Height, PixelFormat.Format16bppRgb565);

    webrowse.DrawToBitmap(bitmap, webrowse.Bounds);


    string Systemimagedownloadpath = System.Configuration.ConfigurationManager.AppSettings["Systemimagedownloadpath"].ToString();
    string fullOutputPath = Systemimagedownloadpath + Request.QueryString["VisitedId"].ToString() + ".png";
    MemoryStream stream = new MemoryStream();
    bitmap.Save(fullOutputPath, System.Drawing.Imaging.ImageFormat.Jpeg);


    // You should put more appropriate MIME type as per your file time - perhaps based on extension
    Response.ContentType = "application/octate-stream";
    Response.AddHeader("content-disposition", "attachment;filename=" + Request.QueryString["VisitedId"].ToString() + ".png");
    // Start pushing file to user, IIS will do the streaming.
    Response.TransmitFile("~/ImageFiles/" + Request.QueryString["VisitedId"].ToString() + ".png");
    Response.Flush();//Won't get error with Flush() so use this Instead of End()
    var filePath = Server.MapPath("~/ImageFiles/" + Request.QueryString["VisitedId"].ToString() + ".png");
    if (File.Exists(filePath))
    {
        File.Delete(filePath);
    }


}

本地主机一切正常，但在实时下载带有该消息的图像时

我也检查了以下解决方案

https://support.microsoft.com/en-in/help/967941/navigation-is-canceled-when-you-browse-to-web-pages-that-are-in-differ

IIS configuration: Navigation to the webpage was canceled when converting page to PDF using SautinSoft.PdfVision

Answer 1

在我的情况下，我们必须进行三个设置，然后我的下载部分才能正常工作

1) SSL证书

2) 我的网络团队将最低版本的 IIS 升级到 IIS10

3) 设置IIS为64位版本