如何在影像繪制后創建pdfc#-有解無憂

我正在使用 PdfSharp 創建一些 pdf 檔案我試圖在保存 pdf 并強制下載用戶之后撰寫影像，但在顯示框下載和打開檔案之后，pdf 為空

var foo = new PrivateFontCollection();
    foo.AddFontFile(HttpContext.Current.Server.MapPath("~/assets/css/base/fonts/Coustom.ttf"));
    var Font_6 = new Font((FontFamily)foo.Families[0], 6f);
    StringFormat rf = new StringFormat();
    rf.LineAlignment = StringAlignment.Far;
    rf.Alignment = StringAlignment.Far;

    Brush _RedColor = new SolidBrush(Color.FromArgb(63, 110, 123));
    System.Drawing.Image imgBackground = System.Drawing.Image.FromFile(Server.MapPath("../assets/EmptyDoc/Letterhead-FA-A4.jpg"));

    int _X = 2300;
    int _Y = 450;

    using (Graphics graphics = Graphics.FromImage(imgBackground))
    {
        graphics.DrawString("TEST", Font_6, _RedColor, new PointF((_X - 40), (_Y)), rf);
    }
    imgBackground.Save(Response.OutputStream, System.Drawing.Imaging.ImageFormat.Png);
    PdfDocument document = new PdfDocument();
    PdfPage page = document.AddPage();
    XGraphics gfx = XGraphics.FromPdfPage(page);



    byte[] fileContents = null;
    MemoryStream memoryStream = new MemoryStream();

    document.Save(memoryStream, true);
    fileContents = memoryStream.ToArray();

    Response.Clear();
    Response.ContentType = "application/force-download";
    Response.AddHeader("content-disposition", "attachment;    filename=TEST.pdf");
    Response.BinaryWrite(fileContents);

uj5u.com熱心網友回復：

使用 PdfSharp，您可以添加如下影像：

using (FileStream stream = new FileStream(pngFile, FileMode.Open, FileAccess.ReadWrite, FileShare.Read))
   {
       XImage image = XImage.FromStream(stream);
       XGraphics graphics = XGraphics.FromPdfPage(this.currentPage);
       graphics.DrawImage(image, 0 , 0, 200, 100);
   }

您只需要將 pngFile 替換為繪圖檔案的完整路徑。

編輯：

閱讀您的代碼后，您可以嘗試在該行之后添加XGraphics gfx = XGraphics.FromPdfPage(page);：

XImage image = XImage.FromStream(strm);
XGraphics graphics = XGraphics.FromPdfPage(page);
graphics.DrawImage(image, 0 , 0, 200, 100);

然后更換

imgBackground.Save(Response.OutputStream, System.Drawing.Imaging.ImageFormat.Png);

經過

MemoryStream strm = new MemoryStream();
imgBackground.Save(strm, System.Drawing.Imaging.ImageFormat.Png);

似乎該功能不接受您的Stream，所以嘗試使用MemoryStream

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標籤：C＃pdf网络表格pdfsharp

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