使用Aspose组件将WORD、PDF、PPT转为图片

			
using System;
using System.Collections.Generic;
using System.Text;
using OMCS.Engine.WhiteBoard;
using ESBasic;
using System.Drawing.Imaging;
using System.IO;
using System.Drawing;
using Schematrix;

namespace OMCS.Demos.WhiteBoardTest
{
    /**//*  
     * 
     * 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。
     * 
     * 
     */

    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#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
    /** <summary>
    /// 图片转换器工厂。
    /// </summary>
    public class ImageConverterFactory : IImageConverterFactory
    {
        public IImageConverter CreateImageConverter(string extendName)
        {
            if (extendName == ".doc" || extendName == ".docx")
            {
                return new Word2ImageConverter();
            }

            if (extendName == ".pdf")
            {
                return new Pdf2ImageConverter();
            }

            if (extendName == ".ppt" || extendName == ".pptx")
            {
                return new Ppt2ImageConverter();
            }

            if (extendName == ".rar")
            {
                return new Rar2ImageConverter(); 
            }

            return null;
        }

        public bool Support(string extendName)
        {
            return extendName == ".doc" || extendName == ".docx" || extendName == ".pdf" || extendName == ".ppt" || extendName == ".pptx" || extendName == ".rar";
        }
    } 
    #endregion

    将word文档转换为图片#region 将word文档转换为图片
    public class Word2ImageConverter : IImageConverter
    {
        private bool cancelled = false;
        public event CbGeneric<int, int> ProgressChanged;
        public event CbGeneric ConvertSucceed;
        public event CbGeneric<string> ConvertFailed;

        public void Cancel()
        {
            if (this.cancelled)
            {
                return;
            }

            this.cancelled = true;
        }

        public void ConvertToImage(string originFilePath, string imageOutputDirPath)
        {
            this.cancelled = false;
            ConvertToImage(originFilePath, imageOutputDirPath, 0, 0, null, 200);
        }

        /** <summary>
        /// 将Word文档转换为图片的方法      
        /// </summary>
        /// <param name="wordInputPath">Word文件路径</param>
        /// <param name="imageOutputDirPath">图片输出路径，如果为空，默认值为Word所在路径</param>      
        /// <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>
        /// <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Word总页数</param>
        /// <param name="imageFormat">设置所需图片格式，如果为null，默认格式为PNG</param>
        /// <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>
        private void ConvertToImage(string wordInputPath, string imageOutputDirPath, int startPageNum, int endPageNum, ImageFormat imageFormat, int resolution)
        {
            try
            {
                Aspose.Words.Document doc = new Aspose.Words.Document(wordInputPath);

                if (doc == null)
                {
                    throw new Exception("Word文件无效或者Word文件被加密&#