C# 如何使用iTextSharp将TIFF字节数组转换为PDF字节数组?
我一直在尝试在我的Web应用程序的浏览器上显示TIFF图像。但由于浏览器不支持TIFF,我尝试将TIFF字节数组转换为PDF字节数组,我唯一可以使用的第三方库是C# 如何使用iTextSharp将TIFF字节数组转换为PDF字节数组?,c#,itext,C#,Itext,我一直在尝试在我的Web应用程序的浏览器上显示TIFF图像。但由于浏览器不支持TIFF,我尝试将TIFF字节数组转换为PDF字节数组,我唯一可以使用的第三方库是iTextSharp 但是我一直在做一些错误的事情,MemoryStream在我身上出错,或者生成的PDF被破坏 守则: using System; using System.Drawing; using System.Drawing.Imaging; using System.IO; using System.Linq; using i
iTextSharp
但是我一直在做一些错误的事情,MemoryStream
在我身上出错,或者生成的PDF被破坏
守则:
using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Linq;
using iTextSharp.text;
using iTextSharp.text.pdf;
namespace TiffToPDFApplication
{
public class UsingiTextSharp
{
/// <summary>
///
/// </summary>
/// <param name="path"></param>
public string TiffToPdfConverter(string path, string targetLoc, string fileName)
{
string fileNameWithLoc = String.Empty;
string fileNameWithLoc2 = String.Empty;
if (fileName == String.Empty)
{
string[] pathArr = path.Split('\\');
string[] fileArr = pathArr.Last().Split('.');
fileName = fileArr[0];
}
fileName = fileName + ".pdf";
if (File.Exists(path))
{
try
{
FileStream fileStream = File.OpenRead(path);
byte[] tiffByteArray = new byte[fileStream.Length];
fileStream.Read(tiffByteArray, 0, tiffByteArray.Length);
fileStream.Close();
convertImage(tiffByteArray);
// Convert to PDF Byte Array
byte[] pdfbyteArray = ConvertToPDFArray(tiffByteArray);
//FileName and Location
fileNameWithLoc = targetLoc + "\\" + fileName;
// Writing File to the Local Location
using (Stream file = File.OpenWrite(fileNameWithLoc))
{
file.Write(pdfbyteArray, 0, pdfbyteArray.Length);
}
}
catch(Exception ex)
{
throw ex;
}
}
return fileNameWithLoc;
}
/// <summary>
///
/// </summary>
/// <param name="inboundFaxBytes"></param>
/// <returns></returns>
public static byte[] ConvertToPDFArray(byte[] inboundFaxBytes)
{
byte[] imagePdfBytes = null;
try
{
using (MemoryStream ms = new MemoryStream())
{
Bitmap faxDocBitmap;
ms.Write(inboundFaxBytes, 0, inboundFaxBytes.Length);
faxDocBitmap = new Bitmap(ms);
iTextSharp.text.Document document = new iTextSharp.text.Document(PageSize.A4, 50, 50, 50, 50);
iTextSharp.text.pdf.PdfWriter writer = iTextSharp.text.pdf.PdfWriter.GetInstance(document, ms);
int totalPages = faxDocBitmap.GetFrameCount(System.Drawing.Imaging.FrameDimension.Page);
//document.SetPageSize(PageSize.A4);
document.Open();
PdfContentByte cb = writer.DirectContent;
for (int page = 0; page < totalPages; ++page)
{
faxDocBitmap.SelectActiveFrame(System.Drawing.Imaging.FrameDimension.Page, page);
iTextSharp.text.Image img = iTextSharp.text.Image.GetInstance(faxDocBitmap, System.Drawing.Imaging.ImageFormat.Bmp);
img.ScalePercent(72f / img.DpiX * 100, 72f / img.DpiY * 100);
img.SetAbsolutePosition(0, 0);
// Memory Stream is not expandable
cb.AddImage(img);
document.NewPage();
}
document.Close();
imagePdfBytes = ms.ToArray();
ms.Dispose();
}
}
catch (Exception e)
{
throw e;
}
return imagePdfBytes;
}
}
}
使用系统;
使用系统图;
使用系统、绘图、成像;
使用System.IO;
使用System.Linq;
使用iTextSharp.text;
使用iTextSharp.text.pdf;
命名空间TiffToPDFApplication
{
使用文本夏普的公共类
{
///
///
///
///
公共字符串TiffToPdfConverter(字符串路径、字符串targetLoc、字符串文件名)
{
string fileNameWithLoc=string.Empty;
string fileNameWithLoc2=string.Empty;
如果(文件名==String.Empty)
{
字符串[]pathArr=path.Split('\\');
字符串[]fileArr=pathArr.Last().Split('.');
fileName=fileArr[0];
}
文件名=文件名+“.pdf”;
if(File.Exists(path))
{
尝试
{
FileStream FileStream=File.OpenRead(路径);
byte[]tiffByteArray=新字节[fileStream.Length];
读取(tiffByteArray,0,tiffByteArray.Length);
fileStream.Close();
convertImage(tiffByteArray);
//转换为PDF字节数组
字节[]pdfbyteArray=ConvertToPDFArray(tiffByteArray);
//文件名和位置
fileNameWithLoc=targetLoc+“\\”+文件名;
//正在将文件写入本地位置
使用(Stream file=file.OpenWrite(fileNameWithLoc))
{
Write(pdfbyteArray,0,pdfbyteArray.Length);
}
}
捕获(例外情况除外)
{
掷骰子;
}
}
返回fileNameWithLoc;
}
///
///
///
///
///
公共静态字节[]ConvertToPDFArray(字节[]inboundFaxBytes)
{
字节[]imagePdfBytes=null;
尝试
{
使用(MemoryStream ms=new MemoryStream())
{
位图;
ms.Write(inboundFaxBytes,0,inboundFaxBytes.Length);
faxDocBitmap=新位图(毫秒);
iTextSharp.text.Document Document=新的iTextSharp.text.Document(PageSize.A4,50,50,50);
iTextSharp.text.pdf.PdfWriter writer=iTextSharp.text.pdf.PdfWriter.GetInstance(文档,ms);
int totalPages=faxDocBitmap.GetFrameCount(System.Drawing.Imaging.FrameDimension.Page);
//文件。设置页面大小(页面大小为A4);
document.Open();
PdfContentByte cb=writer.DirectContent;
对于(int page=0;page
如果有人能指出我做错了什么,那就太好了
提前谢谢 实际上,我对MemoryStream做了一些修补,并对ConvertToPDFArray方法进行了更改,使其正常工作:
/// <summary>
///
/// </summary>
/// <param name="inboundFaxBytes"></param>
/// <returns></returns>
public static byte[] ConvertToPDFArray(byte[] inboundFaxBytes)
{
byte[] imagePdfBytes = null;
try
{
using (MemoryStream ms = new MemoryStream())
{
iTextSharp.text.Document document = new iTextSharp.text.Document(PageSize.A4, 50, 50, 50, 50);
MemoryStream msBmp = new MemoryStream();
msBmp.Write(inboundFaxBytes, 0, inboundFaxBytes.Length);
Bitmap faxDocBitmap = new Bitmap(msBmp);
iTextSharp.text.pdf.PdfWriter writer = iTextSharp.text.pdf.PdfWriter.GetInstance(document, ms);
int totalPages = faxDocBitmap.GetFrameCount(System.Drawing.Imaging.FrameDimension.Page);
//document.SetPageSize(PageSize.A4);
document.Open();
PdfContentByte cb = writer.DirectContent;
for (int page = 0; page < totalPages; ++page)
{
faxDocBitmap.SelectActiveFrame(System.Drawing.Imaging.FrameDimension.Page, page);
iTextSharp.text.Image img = iTextSharp.text.Image.GetInstance(faxDocBitmap, System.Drawing.Imaging.ImageFormat.Bmp);
img.ScalePercent(72f / img.DpiX * 100, 72f / img.DpiY * 100);
img.SetAbsolutePosition(0, 0);
// Memory Stream is not expandable
cb.AddImage(img);
document.NewPage();
}
document.Close();
imagePdfBytes = ms.ToArray();
ms.Dispose();
}
}
catch (Exception e)
{
throw e;
}
return imagePdfBytes;
}
//
///
///
///
///
公共静态字节[]ConvertToPDFArray(字节[]inboundFaxBytes)
{
字节[]imagePdfBytes=null;
尝试
{
使用(MemoryStream ms=new MemoryStream())
{
iTextSharp.text.Document Document=新的iTextSharp.text.Document(PageSize.A4,50,50,50);
MemoryStream msBmp=新的MemoryStream();
msBmp.Write(inboundFaxBytes,0,inboundFaxBytes.Length);
位图faxDocBitmap=新位图(msBmp);
iTextSharp.text.pdf.PdfWriter writer=iTextSharp.text.pdf.PdfWriter.GetInstance(文档,ms);
int totalPages=faxDocBitmap.GetFrameCount(System.Drawing.Imaging.FrameDimension.Page);
//文件。设置页面大小(页面大小为A4);
document.Open();
PdfContentByte cb=writer.DirectContent;
对于(int page=0;page