Asp.net mvc word预览与打印

解决方案：

1. 在后台把word文件转化成pdf，在前台用iframe显示pdf,打印iframe，即可。

优点：用户体验好。

缺点：不支持IE。

实现 ：

引用netoffice组件

主要代码：

Word.Application wordApplication = new Word.Application();
                Word.Document pDoc = wordApplication.Documents.Open(path);
                pDoc.Activate();

                pDoc.SaveAs(pdf, WdSaveFormat.wdFormatPDF);
                wordApplication.Quit();
                wordApplication.Dispose();

2. 在后台把word转化面html，读取html文本，增加打印脚本，输出到前台。

优点：浏览器支持的好。

缺点：用html显示word，不是太好看。

实现 ：

引用：

主要代码：

    public class WordToHtmlConverter
    {
        /// <summary>
        /// Convert Docx to Html
        /// </summary>
        /// <param name="source">source file full name</param>
        /// <returns>htmlstring</returns>
        public static string ToHtml(string source)
        {
            var htmlString = string.Empty;
            var file = new FileInfo(source);

            byte[] bytes = File.ReadAllBytes(file.FullName);
            using (MemoryStream memoryStream = new MemoryStream())
            {
                memoryStream.Write(bytes, 0, bytes.Length);
                using (var wDoc = WordprocessingDocument.Open(memoryStream, true))
                {
                    var imageFolder = source.Substring(0, source.Length - 5) + "_files";
                    int imageCounter = 0;
                    
                    HtmlConverterSettings settings = new HtmlConverterSettings()
                    {
                        AdditionalCss = "body { margin: 1cm auto; max- 20cm; padding: 0; }",
                        PageTitle = "新系统",
                        FabricateCssClasses = true,
                        CssClassPrefix = "pt-",
                        RestrictToSupportedLanguages = false,
                        RestrictToSupportedNumberingFormats = false,
                        ImageHandler = imageInfo =>
                        {
                            DirectoryInfo localDirInfo = new DirectoryInfo(imageFolder);
                            if (!localDirInfo.Exists)
                                localDirInfo.Create();
                            ++imageCounter;
                            string extension = imageInfo.ContentType.Split('/')[1].ToLower();
                            ImageFormat imageFormat = null;
                            if (extension == "png")
                                imageFormat = ImageFormat.Png;
                            else if (extension == "gif")
                                imageFormat = ImageFormat.Gif;
                            else if (extension == "bmp")
                                imageFormat = ImageFormat.Bmp;
                            else if (extension == "jpeg")
                                imageFormat = ImageFormat.Jpeg;
                            else if (extension == "tiff")
                            {
                                // Convert tiff to gif.
                                extension = "gif";
                                imageFormat = ImageFormat.Gif;
                            }
                            else if (extension == "x-wmf")
                            {
                                extension = "wmf";
                                imageFormat = ImageFormat.Wmf;
                            }

                            // If the image format isn't one that we expect, ignore it,
                            // and don't return markup for the link.
                            if (imageFormat == null)
                                return null;

                            string imageFileName = imageFolder + "/image" +
                                imageCounter.ToString() + "." + extension;
                            try
                            {
                                imageInfo.Bitmap.Save(imageFileName, imageFormat);
                            }
                            catch (System.Runtime.InteropServices.ExternalException)
                            {
                                return null;
                            }
                            string imageSource = localDirInfo.Name + "/image" +
                                imageCounter.ToString() + "." + extension;

                            XElement img = new XElement(Xhtml.img,
                                new XAttribute(NoNamespace.src, imageSource),
                                imageInfo.ImgStyleAttribute,
                                imageInfo.AltText != null ?
                                    new XAttribute(NoNamespace.alt, imageInfo.AltText) : null);
                            return img;
                        }
                    };
                    XElement htmlElement = HtmlConverter.ConvertToHtml(wDoc, settings);

                    // Produce HTML document with <!DOCTYPE html > declaration to tell the browser we are using HTML5.
                    var html = new XDocument(new XDocumentType("html", null, null, null), htmlElement);

                    htmlString = html.ToString(SaveOptions.DisableFormatting);
                }
            }

            return htmlString;
        }
    }

        public string NoticePrint(NoticeResult model)
        {
            // 第一步，生成新的doc文档，替换模板文件中的标签，这里用的是NPOI，这个方法就不显示了，没什么东西。
            var path = this.GetDocFileName(model);

            // 第二步，把doc文件，转化成html文件
            var html = WordToHtmlConverter.ToHtml(path);

            // 第三步，对html追加script脚本
            var result = html + GetPrintScript();

            // 第四步，返回
            return result;
        }

        private string GetPrintScript()
        {
            return  @"<script type='text/javascript'> window.onload = function() { window.print(); };</script >";
        }

Controller Code:

public ActionResult Print(NoticeResult model)
        {
            var result = new Response<bool>();

            if (model != null)
            {
                var html = this.service.NoticePrint(model);
                
                return Content(html, "text/html");
            }

            result.ErrMsg = "打印参数异常";

            return Json(result);

        }

代码有删减，不能拿来直接用！！！