如何从.aspx页面生成PDF

Question

i want to create PDF, from a currently running .aspx page and i successfully done this. But problem is that when i login through a login page and go for to create a PDF of a report_page(i can access this report_page only when i successfully login) and click on button to generate a PDF of currently running report_page then here PDF is generating of a login page rather than report_page. And here i have another report_page which need not to login to generate report when i am generating report through this report_page(not need to login) and try to convert it to PDF then it is working correctly means here PDF is generated of report_page.

here i paste my code please check it and give me solution for this:

 protected void btn_print_Click(object sender, EventArgs e)
    {
        try
        {
            string url = HttpContext.Current.Request.Url.AbsoluteUri;
            int width = 850;
            int height = 550;
            Thumbnail1 thumbnail = new Thumbnail1(url, 990, 1000, width, height);
            Bitmap image = thumbnail.GenerateThumbnail();
            image.Save(Server.MapPath("~") + "/Dwnld/Thumbnail.bmp");
            imagepath = Server.MapPath("~").ToString() + "\\Dwnld\\" + "Thumbnail.bmp";
            imagepath1 = Server.MapPath("~").ToString() + "\\Dwnld\\" + "Thumbnail.pdf";
            convetToPdf();
        }
        catch (Exception)
        {

            throw;
        }
    }



string imagepath = null;
    string imagepath1 = null;
    public void convetToPdf()
    {
        PdfDocument doc = new PdfDocument();
        System.Drawing.Size size = PageSizeConverter.ToSize(PdfSharp.PageSize.A4);
        PdfPage pdfPage = new PdfPage();
        pdfPage.Orientation = PageOrientation.Landscape;
        doc.Pages.Add(pdfPage);
        //  XSize size = PageSizeConverter.ToSize(PdfSharp.PageSize.A4)
        XGraphics xgr = XGraphics.FromPdfPage(doc.Pages[0]);
        XImage img = XImage.FromFile(imagepath);
        xgr.DrawImage(img, 0, 0);
        doc.Save(imagepath1);
        xgr.Dispose();
        img.Dispose();
        doc.Close();
        Response.ContentType = "Application/pdf";
        //Get the physical path to the file.
        string FilePath = imagepath1;
        //Write the file directly to the HTTP content output stream.
        Response.WriteFile(FilePath);
        Response.End();
    }
    public class Thumbnail1
    {
        public string Url { get; set; }
        public Bitmap ThumbnailImage { get; set; }
        public int Width { get; set; }
        public int Height { get; set; }
        public int BrowserWidth { get; set; }
        public int BrowserHeight { get; set; }

        public Thumbnail1(string Url, int BrowserWidth, int BrowserHeight, int ThumbnailWidth, int ThumbnailHeight)
        {
            this.Url = Url;
            this.BrowserWidth = BrowserWidth;
            this.BrowserHeight = BrowserHeight;
            this.Height = ThumbnailHeight;
            this.Width = ThumbnailWidth;
        }
        public Bitmap GenerateThumbnail()
        {
            Thread thread = new Thread(new ThreadStart(GenerateThumbnailInteral));
            thread.SetApartmentState(ApartmentState.STA);
            thread.Start();
            thread.Join();
            return ThumbnailImage;
        }
        private void GenerateThumbnailInteral()
        {
            WebBrowser webBrowser = new WebBrowser();
            webBrowser.ScrollBarsEnabled = false;
            webBrowser.Navigate(this.Url);
            webBrowser.DocumentCompleted += new WebBrowserDocumentCompletedEventHandler(WebBrowser_DocumentCompleted);
            while (webBrowser.ReadyState != WebBrowserReadyState.Complete) System.Windows.Forms.Application.DoEvents();
            webBrowser.Dispose();
        }
        private void WebBrowser_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
        {
            WebBrowser webBrowser = (WebBrowser)sender;
            webBrowser.ClientSize = new Size(this.BrowserWidth, this.BrowserHeight);
            webBrowser.ScrollBarsEnabled = false;
            this.ThumbnailImage = new Bitmap(webBrowser.Bounds.Width, webBrowser.Bounds.Height);
            webBrowser.BringToFront();
            webBrowser.DrawToBitmap(ThumbnailImage, webBrowser.Bounds);
            this.ThumbnailImage = (Bitmap)ThumbnailImage.GetThumbnailImage(Width, Height, null, IntPtr.Zero);
        }
    }
    protected void CreateThumbnailImage(object sender, EventArgs e)
    {

    }

Answer 1

The issue is that you are requesting the page-to-be-generated in a separate request which does not include your login cookie/session. It is requesting it as though it was a completely separate browser would.

The only way I can think is that if you have basic authentication turned on in IIS you can change the url to be: http://myThumbnailUser:myThumbnailPassw0rd@www.mydomain.com/path/to/page/to/be/rendered.aspx .

You could try and attach the method that does all the generation to the page unload event to allow you to get the response stream, pump it into the WebBrowser control and thenuse that to generate your PDF.

protected void btn_print_Click(object sender, EventArgs e)
{
    try
    {
        int width = 850;
        int height = 550;

        this.Page.Unload += delegate {
            Thumbnail1 thumbnail = new Thumbnail1(this.Page, 990, 1000, width, height);
            Bitmap image = thumbnail.GenerateThumbnail();
            image.Save(Server.MapPath("~") + "/Dwnld/Thumbnail.bmp");
            imagepath = Server.MapPath("~").ToString() + "\\Dwnld\\" + "Thumbnail.bmp";
            imagepath1 = Server.MapPath("~").ToString() + "\\Dwnld\\" + "Thumbnail.pdf";
            convetToPdf();
        }
    }
    catch (Exception)
    {

        throw;
    }
}

...

public Thumbnail1(Page page, int BrowserWidth, int BrowserHeight, int ThumbnailWidth, int ThumbnailHeight)
    {
        this.Page = page;
        this.BrowserWidth = BrowserWidth;
        this.BrowserHeight = BrowserHeight;
        this.Height = ThumbnailHeight;
        this.Width = ThumbnailWidth;
    }

...

private void GenerateThumbnailInteral()
    {
        WebBrowser webBrowser = new WebBrowser();
        webBrowser.ScrollBarsEnabled = false;
        webBrowser.Navigate(this.Url);
        webBrowser.DocumentStream = this.Page.Response.GetResponseStream()
        webBrowser.ClientSize = new Size(this.BrowserWidth, this.BrowserHeight);
        webBrowser.ScrollBarsEnabled = false;
        this.ThumbnailImage = new Bitmap(webBrowser.Bounds.Width, webBrowser.Bounds.Height);
        webBrowser.BringToFront();
        webBrowser.DrawToBitmap(ThumbnailImage, webBrowser.Bounds);
        this.ThumbnailImage = (Bitmap)ThumbnailImage.GetThumbnailImage(Width, Height, null, IntPtr.Zero);
    }

That also might work..