Question

我有一个图像，我想用c＃写入itext Pdf文件。这是我的代码，用于从图表生成图像并写入itext pdf文件。

Document pdfDoc = new Document(PageSize.A4, 10f, 10f, 10f, 0f);

    using (MemoryStream stream = new MemoryStream())
    {
        pdfDoc.Open();
        pieChart.SaveImage(stream, ChartImageFormat.Png);
        iTextSharp.text.Image chartImage = iTextSharp.text.Image.GetInstance(stream.GetBuffer());
        chartImage.ScalePercent(75f);
        pdfDoc.Add(chartImage);
    }
        pdfDoc.Close();

现在根据我的要求，我必须使用另存为对话框打开此pdf文件。这是我尝试打开此pdf文件的代码..

Stream myStream;
SaveFileDialog saveFileDialog1 = new SaveFileDialog();

        saveFileDialog1.Filter = "Pdf files (*.pdf)|*.pdf|All files (*.*)|*.*";
        saveFileDialog1.FilterIndex = 0;
        saveFileDialog1.RestoreDirectory = true;

        if (saveFileDialog1.ShowDialog() == DialogResult.OK)
        {
            if ((myStream = saveFileDialog1.OpenFile()) != null)
            {
                // Code to write the stream goes here.
                PdfWriter.GetInstance(pdfDoc, myStream);
                myStream.Close();
            }
        }

但我无法获取pdf文件.Dialogue Box即将推出，但我无法获取pdf文件。请帮我解决这个问题。提前谢谢。

Answer 1

您需要将流字节数据保存到文件中......

Stream myStream;
SaveFileDialog saveFileDialog1 = new SaveFileDialog();

        saveFileDialog1.Filter = "Pdf files (*.pdf)|*.pdf|All files (*.*)|*.*";
        saveFileDialog1.FilterIndex = 0;
        saveFileDialog1.RestoreDirectory = true;

        if (saveFileDialog1.ShowDialog() == DialogResult.OK)
        {
            if ((myStream = saveFileDialog1.OpenFile()) != null)
            {
                // Code to write the stream goes here.
                PdfWriter.GetInstance(pdfDoc, myStream);
                myStream.Close();

using (FileStream file = new FileStream(saveFileDialog1.FileName, FileMode.Create, System.IO.FileAccess.Write,FileShare.ReadWrite)) {
   byte[] bytes = new byte[myStream.Length];
   ms.Read(bytes, 0, (int)myStream.Length);
   file.Write(bytes, 0, bytes.Length);
   myStream.Close();
}

            }
        }

您可以使用streamwriter编写流数据...

将MemoryStream写入WInform中的SaveAs对话框

1 个答案: