word转html实现预览（asp.net）

word转html

需要通过nuget 安装

Microsoft.Office.Interop.Word   Microsoft.Office.Interop.Excel  
使用 Microsoft.AspNetCore.Hosting;获取绝对的物理地址，将生成的html放到对应的物理地址上

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using Microsoft.Office.Interop.Excel;

using System.Diagnostics;

using System.IO;

using Microsoft.Office.Interop.Word;

using Microsoft.AspNetCore.Mvc;

using System.Net;

using Microsoft.AspNetCore.Hosting;

namespace wordTest.Controllers

{

    public class HomeController : Controller

    {
　　　　　//依赖注入获取绝对物理地址的对象

        private readonly IHostingEnvironment _hostingEnvironment;

        public HomeController(IHostingEnvironment hostingEnvironment)

        {

            _hostingEnvironment = hostingEnvironment;

        }

        #region Index页面

        /// <summary>

        /// Index页面

        /// </summary>

        /// <paramname="url">例：/uploads/......XXX.xls</param>

        public ActionResult Index(string url)

            {
　　　　　　　　//绝对定位资源文件夹(wwwroot)下到D://.../wwwroot/

            string webRootPath = _hostingEnvironment.WebRootPath;
　　　　　　　　//绝对定位到项目根目录下D://.../

            string contentRootPath = _hostingEnvironment.ContentRootPath;

            url = "/files/charts.docx";

            string physicalPath = webRootPath + url;
　　　　　　　　//获取后缀名

            string extension = Path.GetExtension(physicalPath);

                string htmlUrl = "";

                switch (extension.ToLower())

                {

                    case ".xls":

                    case ".xlsx":

                        htmlUrl = PreviewExcel(physicalPath, url);

                        break;

                    case ".doc":

                    case ".docx":

                        htmlUrl = PreviewWord(physicalPath, url);

                        break;

                    case ".txt":

                        htmlUrl = PreviewTxt(physicalPath, url);

                        break;

                    case ".pdf":

                        htmlUrl = PreviewPdf(physicalPath, url);

                        break;

                    case ".jpg":

                    case ".jpeg":

                    case ".bmp":

                    case ".gif":

                    case ".png":

                        htmlUrl = PreviewImg(physicalPath, url);

                        break;

                    default:

                        htmlUrl = PreviewOther(physicalPath, url);

                        break;

                }

　　　　　　　　　　//跳转到转换后的html页面（转换后的页面）

                return Redirect(Url.Content(htmlUrl));

            }

            #endregion

            #region 预览Excel

            /// <summary>

            /// 预览Excel

            /// </summary>

            public string PreviewExcel(string physicalPath, string url)

            {

                Microsoft.Office.Interop.Excel.Application application = null;

                Microsoft.Office.Interop.Excel.Workbook workbook = null;

                application = new Microsoft.Office.Interop.Excel.Application();

                object missing = Type.Missing;

                object trueObject = true;

                application.Visible = false;

                application.DisplayAlerts = false;

                workbook = application.Workbooks.Open(physicalPath, missing, trueObject, missing, missing, missing,

                   missing, missing, missing, missing, missing, missing, missing, missing, missing);

                //Save Excelto Html

                object format = Microsoft.Office.Interop.Excel.XlFileFormat.xlHtml;

                string htmlName = Path.GetFileNameWithoutExtension(physicalPath) + ".html";

                String outputFile = Path.GetDirectoryName(physicalPath) + "\\" + htmlName;

                workbook.SaveAs(outputFile, format, missing, missing, missing,

                                  missing, XlSaveAsAccessMode.xlNoChange, missing,

                                  missing, missing, missing, missing);

                workbook.Close();

                application.Quit();

                return Path.GetDirectoryName(WebUtility.UrlDecode(url)) + "\\" + htmlName;

            }

            #endregion

            #region 预览Word

            /// <summary>

            /// 预览Word

            /// </summary>

            public string PreviewWord(string physicalPath, string url)

            {

                Microsoft.Office.Interop.Word._Application application = null;

                Microsoft.Office.Interop.Word._Document doc = null;

                application = new Microsoft.Office.Interop.Word.Application();

                object missing = Type.Missing;

                object trueObject = true;

                application.Visible = false;

                application.DisplayAlerts = WdAlertLevel.wdAlertsNone;

                doc = application.Documents.Open(physicalPath, missing, trueObject, missing, missing, missing,

                   missing, missing, missing, missing, missing, missing, missing, missing, missing, missing);

                //Save Excelto Html

                object format = Microsoft.Office.Interop.Word.WdSaveFormat.wdFormatHTML;

                string htmlName = Path.GetFileNameWithoutExtension(physicalPath) + ".html";

                String outputFile = Path.GetDirectoryName(physicalPath) + "\\" + htmlName;

                doc.SaveAs(outputFile, format, missing, missing, missing,

                                  missing, XlSaveAsAccessMode.xlNoChange, missing,

                                  missing, missing, missing, missing);

                doc.Close();

                application.Quit();

                return Path.GetDirectoryName(WebUtility.UrlDecode(url)) + "\\" + htmlName;

            }

            #endregion

            #region 预览Txt

            /// <summary>

            /// 预览Txt

            /// </summary>

            public string PreviewTxt(string physicalPath, string url)

            {

                return WebUtility.UrlDecode(url);

            }

            #endregion

            #region 预览Pdf

            /// <summary>

            /// 预览Pdf

            /// </summary>

            public string PreviewPdf(string physicalPath, string url)

            {

                return WebUtility.UrlDecode(url);

            }

            #endregion

            #region 预览图片

            /// <summary>

            /// 预览图片

            /// </summary>

            public string PreviewImg(string physicalPath, string url)

            {

                return WebUtility.UrlDecode(url);

            }

            #endregion

            #region 预览其他文件

            /// <summary>

            /// 预览其他文件

            /// </summary>

            public string PreviewOther(string physicalPath, string url)

            {

                return WebUtility.UrlDecode(url);

            }

            #endregion

        }

    }

注意，使用的office不兼容asp.netCore2.1版本变成netFramework版本