前言
近日項目中做到一個功能，需要上傳附件后能夠在線預覽。之前也沒做過這類似的，於是乎就查找了相關資料，.net實現Office文件預覽大概有這幾種方式：
① 使用Microsoft的Office組件將文件直接轉換為html文件（優點：代碼實現最簡單，工作強度最小。缺點：效果極差）
②使用Microsoft的Office組件將文件轉換為PDF格式文件，然后再使用pdf2swf轉換為swf文件，也就是flash文件在使用FlexPaper展示出來（優點：預覽效果能接受，缺點：代碼量大）
③使用Office online(優點：表現完美，缺點：不適合中小企業應用)
由於開發時間短而且還有其他功能點需要完成，所以暫時先已第一種方式實現了，這里也主要講第一種方式，效果如下圖：
具體實現
這里簡單提一下效果圖中的遮罩效果和上傳實現，有喜歡的朋友也可以參考參考。
遮罩效果就是HTML+CSS+JS來實現的，全部代碼如下：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>彈出層</title> <script src="jquery-1.6.2.min.js" type="text/javascript"></script> <style> .black_overlay{ display: none; position: absolute; top: 0%; left: 0%; width: 100%; height: 100%; background-color: black; z-index:1001; -moz-opacity: 0.8; opacity:.80; filter: alpha(opacity=80); } .white_content { display: none; position: absolute; top: 10%; left: 10%; width: 80%; height: 80%; border: 16px solid lightblue; background-color: white; z-index:1002; overflow: auto; } .white_content_small { display: none; position: absolute; top: 20%; left: 30%; width: 40%; height: 50%; border: 16px solid lightblue; background-color: white; z-index:1002; overflow: auto; } </style> <script type="text/javascript"> //彈出隱藏層 function ShowDiv(show_div,bg_div){ document.getElementById(show_div).style.display='block'; document.getElementById(bg_div).style.display='block' ; var bgdiv = document.getElementById(bg_div); bgdiv.style.width = document.body.scrollWidth; // bgdiv.style.height = $(document).height(); $("#"+bg_div).height($(document).height()); }; //關閉彈出層 function CloseDiv(show_div,bg_div) { document.getElementById(show_div).style.display='none'; document.getElementById(bg_div).style.display='none'; }; </script> </head> <body> <input id="Button1" type="button" value="點擊彈出層" onclick="ShowDiv('MyDiv','fade')" /> <!--彈出層時背景層DIV--> <div id="fade" class="black_overlay"> </div> <div id="MyDiv" class="white_content"> <div style="text-align: right; cursor: default; height: 40px;"> <span style="font-size: 16px;" onclick="CloseDiv('MyDiv','fade')">關閉</span> </div> 目前來說，我還是喜歡這個自己改造的彈出層。自己在項目中也用的是這個。 </div> </body> </html>
上傳的話，因為文件比較小，所以采用的是保存在服務器，在數據庫中存放路徑的方式
前台代碼
<div class="white_content" id="MyDiv" style="text-align: center; display: none;"> <div style="text-align: right; cursor: default; height: 40px;"> <span style="font-size: 16px;" onclick="CloseDiv('MyDiv','fade')">關閉</span> </div> <tr style="width: 50%" id="upload_Image"> <h1> 請上傳常見問題附件</h1> <td align="right" class="Title"> 上傳附件 </td> <td> <asp:FileUpload ID="FileUpload1" runat="server" /> <asp:Label ID="label1" runat="server" ForeColor="Red"></asp:Label> <asp:Button ID="UploadButton" runat="server" Text="上傳附件" OnClick="UploadButton_Click" /> </td> </tr> <tr> <td colspan="2" align="center" id="show_image" style="visibility: hidden"> <asp:Image ID="Image1" runat="server" Height="118px" Width="131px" /> </td> </tr> </div>
后台方法
try { string FullName = FileUpload1.PostedFile.FileName;//獲取附件物理地址 FileInfo fi = new FileInfo(FullName); string name = fi.Name;//獲取附件名稱 string type = fi.Extension;//獲取附件類型 if (type == ".xls" || type == ".xlsx" || type == ".doc" || type == ".docx" || type == ".pdf") { string SavePath = Server.MapPath("~\\uploadFile");//附件保存到文件夾下 if (!Directory.Exists(SavePath)) { Directory.CreateDirectory(SavePath); } this.FileUpload1.PostedFile.SaveAs(SavePath + "\\" + name);//保存路徑 #region 將附件內容保存到數據庫中 int showsuccess = CMSModelManager.Submitted_questionsDAO.Save_File(name,type,SavePath); if (showsuccess == 1) { this.label1.Text = "上傳成功"; } else { this.label1.Text = "服務器繁忙，請稍后重試"; } #endregion } else { this.label1.Text = "請選擇正確的格式附件"; } } catch (Exception ex) { Response.Write(ex.Message); }
圖中所示的將Word轉換成HTML的實現方式：
首先新建一個幫助類
using System; using System.Collections.Generic; using System.Web; //using Microsoft.Office.Core; using Word = Microsoft.Office.Interop.Word; namespace Com.VanruPortal.Admin { public class Office2HtmlHelper { /// <summary> /// Word轉成Html /// </summary> /// <param name="path">要轉換的文檔的路徑</param> /// <param name="savePath">轉換成html的保存路徑</param> /// <param name="wordFileName">轉換成html的文件名字</param> public static void Word2Html(string path, string savePath, string wordFileName) { Word.ApplicationClass word = new Word.ApplicationClass(); Type wordType = word.GetType(); Word.Documents docs = word.Documents; Type docsType = docs.GetType(); Word.Document doc = (Word.Document)docsType.InvokeMember("Open", System.Reflection.BindingFlags.InvokeMethod, null, docs, new Object[] { (object)path, true, true }); Type docType = doc.GetType(); string strSaveFileName = savePath + wordFileName + ".html"; object saveFileName = (object)strSaveFileName; docType.InvokeMember("SaveAs", System.Reflection.BindingFlags.InvokeMethod, null, doc, new object[] { saveFileName, Word.WdSaveFormat.wdFormatFilteredHTML }); docType.InvokeMember("Close", System.Reflection.BindingFlags.InvokeMethod, null, doc, null); wordType.InvokeMember("Quit", System.Reflection.BindingFlags.InvokeMethod, null, word, null); } /// <summary> /// Excel轉成Html /// </summary> /// <param name="path">要轉換的文檔的路徑</param> /// <param name="savePath">轉換成html的保存路徑</param> /// <param name="wordFileName">轉換成html的文件名字</param> public static void Excel2Html(string path, string savePath, string wordFileName) { string str = string.Empty; Microsoft.Office.Interop.Excel.Application repExcel = new Microsoft.Office.Interop.Excel.Application(); Microsoft.Office.Interop.Excel.Workbook workbook = null; Microsoft.Office.Interop.Excel.Worksheet worksheet = null; workbook = repExcel.Application.Workbooks.Open(path, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing); worksheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets[1]; object htmlFile = savePath + wordFileName + ".html"; object ofmt = Microsoft.Office.Interop.Excel.XlFileFormat.xlHtml; workbook.SaveAs(htmlFile, ofmt, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlNoChange, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing); object osave = false; workbook.Close(osave, Type.Missing, Type.Missing); repExcel.Quit(); } } }
后台調用方法
#region 上傳成功后將文件轉換 string physicalPath = Server.MapPath(Server.UrlDecode("/uploadFile"+"\\"+ name));//讀取相對路徑 string extension = Path.GetExtension(physicalPath);//獲取后綴名 string[] show_name = name.Split(new string[] { "." }, StringSplitOptions.RemoveEmptyEntries);//此處的name是上面上傳附件中的名稱分割 string show_name_View = show_name[0];//拿到實際name switch (extension) { case ".doc": case ".docx": Office2HtmlHelper.Word2Html(MapPath("/uploadFile" + "\\" + name + ""), MapPath("/Html/"), "" + show_name_View + "");//調用幫助類中生成WordHtml的方法,並保存起來 Response.Write("<script>window.open('/Html/" + show_name_View + ".html','_blank')</script>");//跳轉並打開保存的相對路徑中hmtl文件 break; case ".xls": case ".xlsx": Office2HtmlHelper.Excel2Html(MapPath("/uploadFile" + "\\" + name + ""), MapPath("/Html/"), "" + show_name_View + ""); Response.Write("<script>window.open('/Html/" + show_name_View + ".html','_blank')</script>"); break; default: break; } #endregion
至此，一個簡易的上傳附件在線瀏覽已經全部實現
如果小伙伴有更好得實現方式或者其他建議，歡迎留言告知～