516 lines
12 KiB
C#
516 lines
12 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Drawing.Imaging;
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using System.IO;
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using System.Drawing;
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using Image = System.Drawing.Image;
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namespace APT.Utility
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{
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public class ConvertImageFile
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{
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public string FileName { get; set; }
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public string FileType { get; set; }
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public byte[] FileData { get; set; }
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}
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public class ConvertImageFileParam
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{
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public ConvertImageFileParam()
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{
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Files = new List<ConvertImageFile>();
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}
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public string FileName { get; set; }
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public byte[] FileData { get; set; }
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public List<ConvertImageFile> Files { get; set; }
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}
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public interface IAsposeConvert
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{
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bool ConvertToImage(string inFileName, Stream inStream, List<ConvertImageFile> list);
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}
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/*
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*
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* 将pdf、ppf、word转换给图片的组件有很多，这里仅使用Aspose组件（试用版）作为示例。
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*
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* Aspose官网：www.aspose.com， 请支持和购买正版Aspose组件。
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*
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*/
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#region 图片转换器工厂 -> 将被注入到OMCS的多媒体管理器IMultimediaManager的ImageConverterFactory属性
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/// <summary>
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/// 图片转换器工厂。
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/// </summary>
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public class ImageConverterFactory
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{
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public IAsposeConvert CreateImageConverter(string fileName)
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{
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var pos = fileName.LastIndexOf(".");
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var extendName = fileName.Substring(pos);
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if (extendName == ".doc" || extendName == ".docx")
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{
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return new Word2ImageConverter();
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}
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//小树增加xls文件类型上传20170329
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if (extendName == ".xls" || extendName == ".xlsx")
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{
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return new Xls2ImageConverter();
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}
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if (extendName == ".pdf")
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{
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return new Pdf2ImageConverter();
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}
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if (extendName == ".ppt" || extendName == ".pptx")
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{
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return new Ppt2ImageConverter();
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}
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return null;
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}
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public bool Support(string extendName)
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{
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//return extendName == ".doc" || extendName == ".docx" || extendName == ".pdf" || extendName == ".ppt" ||
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// extendName == ".pptx" || extendName == ".xls" || extendName == ".xlsx";
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return false;
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}
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}
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#endregion
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#region 将word文档转换为图片
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public class Word2ImageConverter : IAsposeConvert
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{
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private bool cancelled = false;
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public void Cancel()
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{
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if (this.cancelled)
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{
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return;
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}
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this.cancelled = true;
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}
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public bool ConvertToImage(string inFileName, Stream inStream, List<ConvertImageFile> list)
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{
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this.cancelled = false;
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return WordConvertToImage(inFileName, inStream, list, 0, 0, null, 200);
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}
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public bool WordConvertToImage(string inFileName, Stream inStream, List<ConvertImageFile> list,
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int startPageNum, int endPageNum, ImageFormat imageFormat, int resolution)
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{
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try
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{
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//Aspose.Words.Document doc = new Aspose.Words.Document(inStream);
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//if (doc == null)
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//{
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// return false;
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// //throw new Exception("Word文件无效或者Word文件被加密！");
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//}
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//if (startPageNum <= 0)
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//{
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// startPageNum = 1;
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//}
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//if (endPageNum > doc.PageCount || endPageNum <= 0)
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//{
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// endPageNum = doc.PageCount;
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//}
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//if (startPageNum > endPageNum)
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//{
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// int tempPageNum = startPageNum;
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// startPageNum = endPageNum;
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// endPageNum = startPageNum;
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//}
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//if (imageFormat == null)
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//{
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// imageFormat = ImageFormat.Png;
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//}
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//if (resolution <= 0)
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//{
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// resolution = 128;
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//}
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//string imageName = Path.GetFileNameWithoutExtension(inFileName);
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//Aspose.Words.Saving.ImageSaveOptions imageSaveOptions =
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// new Aspose.Words.Saving.ImageSaveOptions(Aspose.Words.SaveFormat.Png);
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//imageSaveOptions.Resolution = resolution;
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//for (int i = startPageNum; i <= endPageNum; i++)
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//{
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// if (this.cancelled)
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// {
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// break;
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// }
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// MemoryStream stream = new MemoryStream();
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// imageSaveOptions.PageIndex = i - 1;
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// string imgFileName = imageName + "_" + i.ToString("000") + "." + imageFormat.ToString();
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// doc.Save(stream, imageSaveOptions);
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// Image img = Image.FromStream(stream);
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// Bitmap bm = ImageHelper.Zoom(img, 0.6f);
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// MemoryStream imgStream = new MemoryStream();
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// bm.Save(imgStream, imageFormat);
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// imgStream.Position = 0;//重置为开始位置
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// byte[] bytes = new byte[imgStream.Length];
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// imgStream.Read(bytes, 0, bytes.Length);
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// ConvertImageFile tmpFile = new ConvertImageFile();
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// tmpFile.FileName = imgFileName;
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// tmpFile.FileType = "image/" + imageFormat.ToString().ToLower();
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// tmpFile.FileData = bytes;
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// list.Add(tmpFile);
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// img.Dispose();
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// stream.Dispose();
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// bm.Dispose();
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// imgStream.Dispose();
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// System.Threading.Thread.Sleep(200);
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//}
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//if (this.cancelled)
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//{
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// return false;
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//}
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return true;
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}
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catch (Exception ex)
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{
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throw new Exception("Word转换失败，详情：" + ex.ToString());
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}
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}
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}
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#endregion
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#region 将pdf文档转换为图片
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public class Pdf2ImageConverter : IAsposeConvert
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{
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private bool cancelled = false;
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public void Cancel()
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{
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if (this.cancelled)
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{
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return;
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}
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this.cancelled = true;
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}
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public bool ConvertToImage(string inFileName, Stream inStream, List<ConvertImageFile> list)
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{
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this.cancelled = false;
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return ConvertToImage(inFileName, inStream, list, 0, 0, 200);
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}
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/// <summary>
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/// 将pdf文档转换为图片的方法
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/// </summary>
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/// <param name="originFilePath">pdf文件路径</param>
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/// <param name="imageOutputDirPath">图片输出路径，如果为空，默认值为pdf所在路径</param>
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/// <param name="startPageNum">从PDF文档的第几页开始转换，如果为0，默认值为1</param>
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/// <param name="endPageNum">从PDF文档的第几页开始停止转换，如果为0，默认值为pdf总页数</param>
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/// <param name="resolution">设置图片的像素，数字越大越清晰，如果为0，默认值为128，建议最大值不要超过1024</param>
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private bool ConvertToImage(string inFileName, Stream inStream, List<ConvertImageFile> list,
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int startPageNum, int endPageNum, int resolution)
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{
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try
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{
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//Aspose.Pdf.Document doc = new Aspose.Pdf.Document(inStream);
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//if (doc == null)
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//{
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// return false;
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// //throw new Exception("pdf文件无效或者pdf文件被加密！");
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//}
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//if (startPageNum <= 0)
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//{
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// startPageNum = 1;
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//}
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//if (endPageNum > doc.Pages.Count || endPageNum <= 0)
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//{
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// endPageNum = doc.Pages.Count;
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//}
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//if (startPageNum > endPageNum)
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//{
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// int tempPageNum = startPageNum;
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// startPageNum = endPageNum;
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// endPageNum = startPageNum;
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//}
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//if (resolution <= 0)
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//{
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// resolution = 128;
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//}
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//string imageName = Path.GetFileNameWithoutExtension(inFileName);
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//for (int i = startPageNum; i <= endPageNum; i++)
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//{
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// if (this.cancelled)
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// {
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// break;
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// }
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// MemoryStream stream = new MemoryStream();
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// string imgFileName = imageName + "_" + i.ToString("000") + ".jpg";
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// Aspose.Pdf.Devices.Resolution reso = new Aspose.Pdf.Devices.Resolution(resolution);
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// Aspose.Pdf.Devices.JpegDevice jpegDevice = new Aspose.Pdf.Devices.JpegDevice(reso, 100);
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// jpegDevice.Process(doc.Pages[i], stream);
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// Image img = Image.FromStream(stream);
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// Bitmap bm = ImageHelper.Zoom(img, 0.6f);
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// MemoryStream imgStream = new MemoryStream();
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// bm.Save(imgStream, ImageFormat.Jpeg);
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// imgStream.Position = 0;//重置为开始位置
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// byte[] bytes = new byte[imgStream.Length];
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// imgStream.Read(bytes, 0, bytes.Length);
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// ConvertImageFile tmpFile = new ConvertImageFile();
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// tmpFile.FileName = imgFileName;
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// tmpFile.FileType = "image/" + ImageFormat.Jpeg.ToString().ToLower();
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// tmpFile.FileData = bytes;
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// list.Add(tmpFile);
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// img.Dispose();
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// stream.Dispose();
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// bm.Dispose();
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// imgStream.Dispose();
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// System.Threading.Thread.Sleep(200);
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//}
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//if (this.cancelled)
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//{
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// return false;
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//}
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}
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catch (Exception ex)
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{
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throw new Exception("PDF转换失败，详情：" + ex.ToString());
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}
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return true;
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}
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}
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#endregion
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#region 将ppt文档转换为图片
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public class Ppt2ImageConverter : IAsposeConvert
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{
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private Pdf2ImageConverter pdf2ImageConverter;
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public void Cancel()
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{
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if (this.pdf2ImageConverter != null)
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{
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this.pdf2ImageConverter.Cancel();
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}
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}
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public bool ConvertToImage(string inFileName, Stream inStream, List<ConvertImageFile> list)
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{
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return ConvertToImage(inFileName, inStream, list, 0, 0, 200);
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}
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private bool ConvertToImage(string inFileName, Stream inStream, List<ConvertImageFile> list,
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int startPageNum, int endPageNum, int resolution)
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{
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try
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{
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//Aspose.Slides.Presentation doc = new Aspose.Slides.Presentation(inStream);
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//if (doc == null)
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//{
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// return false;
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// //throw new Exception("ppt文件无效或者ppt文件被加密！");
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//}
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//if (startPageNum <= 0)
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//{
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// startPageNum = 1;
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//}
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//if (endPageNum > doc.Slides.Count || endPageNum <= 0)
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//{
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// endPageNum = doc.Slides.Count;
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//}
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//if (startPageNum > endPageNum)
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//{
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// int tempPageNum = startPageNum;
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// startPageNum = endPageNum;
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// endPageNum = startPageNum;
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//}
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//if (resolution <= 0)
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//{
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// resolution = 128;
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//}
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//string imageName = Path.GetFileNameWithoutExtension(inFileName);
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////先将ppt转换为pdf临时文件
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//MemoryStream pdfStream = new MemoryStream();
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//doc.Save(pdfStream, Aspose.Slides.Export.SaveFormat.Pdf);
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////再将pdf转换为图片
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//var converter = new Pdf2ImageConverter();
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//converter.ConvertToImage(imageName + ".pdf", pdfStream, list);
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}
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catch (Exception ex)
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{
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throw new Exception("PPT转换失败，详情：" + ex.ToString());
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}
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this.pdf2ImageConverter = null;
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return true;
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}
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private void converter_ProgressChanged(int done, int total)
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{
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}
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private void converter_ConvertSucceed()
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{
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}
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private void converter_ConvertFailed(string msg)
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{
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}
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}
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#endregion
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//小树增加Excel文档格式
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#region 将Excel文档转换为图片
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public class Xls2ImageConverter : IAsposeConvert
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{
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private Pdf2ImageConverter pdf2ImageConverter;
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public void Cancel()
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{
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if (this.pdf2ImageConverter != null)
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{
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this.pdf2ImageConverter.Cancel();
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}
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}
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public bool ConvertToImage(string inFileName, Stream inStream, List<ConvertImageFile> list)
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{
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return ConvertToImage(inFileName, inStream, list, 0, 0, 200);
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}
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private bool ConvertToImage(string inFileName, Stream inStream, List<ConvertImageFile> list,
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int startPageNum, int endPageNum, int resolution)
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{
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try
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{
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//Workbook wb = new Workbook(inStream);
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//if (wb == null) return false;
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//MemoryStream pdfStream = new MemoryStream();
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//wb.Save(pdfStream, Aspose.Cells.SaveFormat.Pdf);
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////先将excel转换为pdf临时文件
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//string imageName = Path.GetFileNameWithoutExtension(inFileName);
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////再将pdf转换为图片
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//var converter = new Pdf2ImageConverter();
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//converter.ConvertToImage(imageName + ".pdf", pdfStream, list);
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}
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catch (Exception ex)
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{
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throw new Exception("Excel转换失败，详情：" + ex.ToString());
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}
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this.pdf2ImageConverter = null;
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return true;
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}
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private void converter_ProgressChanged(int done, int total)
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{
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}
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private void converter_ConvertSucceed()
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{
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}
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private void converter_ConvertFailed(string msg)
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{
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}
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}
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#endregion
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#region
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public static class ImageHelper
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{
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public static Bitmap Zoom(Image origin, float zoomCoef)
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{
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//IL_0015: Unknown result type (might be due to invalid IL or missing references)
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//IL_001a: Expected O, but got Unknown
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//IL_001c: Unknown result type (might be due to invalid IL or missing references)
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//IL_0021: Expected O, but got Unknown
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//IL_0033: Unknown result type (might be due to invalid IL or missing references)
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Bitmap val = new Bitmap((int)((float)origin.Width * zoomCoef), (int)((float)origin.Height * zoomCoef));
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Graphics val2 = Graphics.FromImage(val);
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try
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{
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val2.DrawImage(origin, new Rectangle(0, 0, val.Width, val.Height));
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}
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finally
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{
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((IDisposable)val2)?.Dispose();
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}
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return val;
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}
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}
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#endregion
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}
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