最近有需求从第三方获取到ofd文件后，需要转pdf，
1.目前看的有一个免费的插件，需要安装程序包 FreeSpire.PDF
安装后，直接引用
// odf文件地址 string path = @"D:\OFD\20240725\吴天.ofd";
OfdConverter converter = new OfdConverter(path);
//pathPdf pdf 文件地址 string pathPdf = "D:\OFD\20240725\吴天.pdf";
converter.ToPdf(pathPdf);
这就转成功了，失败直接会抛出异常
2. pdf在转图片
需要引用dll O2S.Components.PDFRender4NET ，dll下载地址： https://note.youdao.com/s/OtHpAcdi
/// <summary>
/// 将PDF文档转换为图片的方法
/// </summary>
/// <param name="pdfInputPath">PDF文件路径</param>
/// <param name="imageOutputPath">图片输出路径</param>
/// <param name="imageName">生成图片的名字</param>
/// <param name="startPageNum">从PDF文档的第几页开始转换</param>
/// <param name="endPageNum">从PDF文档的第几页开始停止转换</param>
/// <param name="imageFormat">设置所需图片格式</param>
/// <param name="definition">设置图片的清晰度，数字越大越清晰 5</param>
/// <param name="imageSize">设置图片总体大小 35</param>
public static void ConvertPDF2Image(string pdfInputPath, string imageOutputPath,
string imageName, int startPageNum, int endPageNum, ImageFormat imageFormat, int definition, int imageSize)
{
PDFFile pdfFile = PDFFile.Open(pdfInputPath);
if (!Directory.Exists(imageOutputPath))
{
Directory.CreateDirectory(imageOutputPath);
}
// validate pageNum
if (startPageNum <= 0)
{
startPageNum = 1;
}
if (endPageNum > pdfFile.PageCount)
{
endPageNum = pdfFile.PageCount;
}
if (startPageNum > endPageNum)
{
int tempPageNum = startPageNum;
startPageNum = endPageNum;
endPageNum = startPageNum;
}
// start to convert each page
for (int i = startPageNum; i <= endPageNum; i++)
{
Bitmap pageImage = pdfFile.GetPageImage(i - 1, imageSize * definition); // 35*5
pageImage.Save(imageOutputPath + imageName, imageFormat);
pageImage.Dispose();
}
pdfFile.Dispose();
}
}
外部方法调用
public class Test
{
// odf字符串转pdf转图片
string ret = new OfdFileHelper().OFDFileDownload("odf-strbase64文件字符串", "吴天");
// 压缩文件
string path = new OfdFileHelper().FileDeal();
}
以下是完整代码
using System;
using System.IO;
using System.IO.Compression;
using System.Drawing;
using System.Drawing.Imaging;
using Spire.Pdf.Conversion;
using O2S.Components.PDFRender4NET;
using NPOI.SS.Formula.Functions;
namespace OfdTest
{
public class OfdFileHelper
{
/// <summary>
/// OFD文件下载到本地
/// </summary>
/// <param name="strbase64">strbase64 ofd文件</param>
/// <param name="fileName">文件名称 =吴天</param>
/// <returns></returns>
public string OFDFileDownload(string strbase64, string fileName)
{
string result = "";
try
{
string targetFilePath = @"D:\OFD\20240725";
if (!Directory.Exists(targetFilePath))
{
Directory.CreateDirectory(targetFilePath);
}
string path = targetFilePath + @"\吴天.ofd";
string pathPdf = targetFilePath + @"\吴天.pdf";
//base64编码的文本 转为 图片
byte[] fileData = Convert.FromBase64String(strbase64);
FileStream fs = new FileStream(path, FileMode.Create);
fs.Write(fileData, 0, fileData.Length);
fs.Close();
Stream fst = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.Read);//将Path该文件读取为流格式 文件大小： fst.Length
// odf文件地址 string path = @"D:\OFD\20240725\吴天.ofd";
OfdConverter converter = new OfdConverter(path);
//pathPdf pdf 文件地址 string pathPdf = "D:\OFD\20240725\吴天.pdf";
converter.ToPdf(pathPdf);
string pngFilePath = targetFilePath + "\\"; // 输出png文件路径
string pngFile = fileName + ".Png"; // 输出png文件
ConvertPDF2Image(pathPdf, pngFilePath, pngFile, 1, 1, ImageFormat.Png, 5, 35);
result = pngFilePath;
}
catch (Exception ex)
{
string str = ex.ToString();
}
return result;
}
/// <summary>
/// 找到已经下载的文件，打包文件
/// </summary>
/// <returns></returns>
public string FileDeal()
{
string filePath = "";
try
{
string targetPath = @"D:\Download\";
string targetFilePath = @"D:\Download\" + DateTime.Now.ToString("yyyy-MM-ddHHmm");
DateTime date = DateTime.Now;
//StreamWriter sw = new StreamWriter(fs);//创建输入流
//sw.Write(""); //写入文本信息
if (!Directory.Exists(targetFilePath))
{
Directory.CreateDirectory(targetFilePath);
}
try
{
string path = @"\OFD\20240725\吴天.Png"; // 原目录文件
var destFile = Path.Combine(targetFilePath, "吴天.Png");
File.Copy(path, destFile, true);// 复制到新目录
File.SetAttributes(path, FileAttributes.Normal);
}
catch (Exception ex)
{ // 下载失败，记录失败原因
File.AppendAllText(targetFilePath + @"\log" + date.ToString("yyyy-MM-dd") + ".txt", "\r\n" + ex.Message);
}
// 压缩
string filename = $"压缩文件test{DateTime.Now.ToString("yyyyMMddHHmmss")}";
string zipName = targetPath + filename + ".zip";
CompressDirectoryZip(targetFilePath + @"\", zipName);
// 打包后的文件地址 targetFilePath
Stream fileStream1 = new FileStream(zipName, FileMode.Open, FileAccess.Read, FileShare.Read);//将Path该文件读取为流格式
byte[] expectedBytes = new byte[fileStream1.Length];
fileStream1.Read(expectedBytes, 0, expectedBytes.Length);//读取该流文件字节，保存到对象中，为测试比对做准备`在这里插入代码片`
filePath = zipName;// 压缩文件地址
}
catch (Exception ex)
{
string ret = ex.Message;
}
return filePath;
}
/// <summary>
/// 将指定目录压缩为Zip文件
/// </summary>
/// <param name="folderPath">文件夹地址 D:/1/ </param>
/// <param name="zipPath">zip地址 D:/1.zip </param>
public static void CompressDirectoryZip(string folderPath, string zipPath)
{
DirectoryInfo directoryInfo = new DirectoryInfo(zipPath);
if (directoryInfo.Parent != null)
{
directoryInfo = directoryInfo.Parent;
}
if (!directoryInfo.Exists)
{
directoryInfo.Create();
}
System.IO.Compression.ZipFile.CreateFromDirectory(folderPath, zipPath, CompressionLevel.Optimal, false);
}
/// <summary>
/// 将PDF文档转换为图片的方法
/// </summary>
/// <param name="pdfInputPath">PDF文件路径</param>
/// <param name="imageOutputPath">图片输出路径</param>
/// <param name="imageName">生成图片的名字</param>
/// <param name="startPageNum">从PDF文档的第几页开始转换</param>
/// <param name="endPageNum">从PDF文档的第几页开始停止转换</param>
/// <param name="imageFormat">设置所需图片格式</param>
/// <param name="definition">设置图片的清晰度，数字越大越清晰 5</param>
/// <param name="imageSize">设置图片总体大小 35</param>
public static void ConvertPDF2Image(string pdfInputPath, string imageOutputPath,
string imageName, int startPageNum, int endPageNum, ImageFormat imageFormat, int definition, int imageSize)
{
PDFFile pdfFile = PDFFile.Open(pdfInputPath);
if (!Directory.Exists(imageOutputPath))
{
Directory.CreateDirectory(imageOutputPath);
}
// validate pageNum
if (startPageNum <= 0)
{
startPageNum = 1;
}
if (endPageNum > pdfFile.PageCount)
{
endPageNum = pdfFile.PageCount;
}
if (startPageNum > endPageNum)
{
int tempPageNum = startPageNum;
startPageNum = endPageNum;
endPageNum = startPageNum;
}
// start to convert each page
for (int i = startPageNum; i <= endPageNum; i++)
{
Bitmap pageImage = pdfFile.GetPageImage(i - 1, imageSize * definition); // 35*5
pageImage.Save(imageOutputPath + imageName, imageFormat);
pageImage.Dispose();
}
pdfFile.Dispose();
}
}
}
标签：文件,string,targetFilePath,int,ofd,base64,path,pdf,startPageNum From： https://www.cnblogs.com/luoqin520/p/18323040