【项目实战】--Office文件预览

上篇文章已经介绍了office文件的上传，这次来简单介绍一下Office文件的预览。

实现如下：
**1、工具准备**
Pdf2swf:用于把PDF格式文件转换为swf文件
Flexpaper：flash播放器，可播放一帧一帧的flash

**2、添加引用**
在项目中添加引用：选择COM里面Microsoft Office 15.0 object Library和Microsoft Word 15.0 object Library。引用里就会自动添加Microsoft.Office.Interop.Word引用

注意*****报错*****
类型“Microsoft.Office.Interop.Word.ApplicationClass"未定义构造函数。无法嵌入互操作类型“Microsoft.Office.Interop.Word.ApplicationClass”。请改用适用的接口。

******解决******
解决方案资源管理器 -> 引用 -> "Microsoft.Office.Interop.Word" -> 右键选择属性 -> 嵌入互操作类型的值改为"false"即可。

**3、实现代码**

• View：

<script src="../../Scripts/MyScript/flexpaper_flash.js"></script>
<div id="dlgPreview" closed="true" class="easyui-dialog" style="width: 750px; height: 750px;padding-top: 30px;padding-bottom: 30px;padding-left: 25px;"
         buttons="#dlg-buttons" title ="添加">
        <form  id="PreviewHomeWork" method="post" >   @*method="post" action="/TeaQueryHomework/AddHomeWork" *@

            @*添加按钮弹出框*@
            <a id="HomeworkBack" class="easyui-linkbutton l-btn"  data-options="plain:true,iconCls:‘icon-back‘" style="margin-left :80px;" href="#" onclick="HomeworkBack()">
                    <span >返回</span>
             </a>
             <div style="position: absolute; left: 60px; top: 100px;">
            <a id="viewerPlaceHolder" style="width: 650px; height: 600px; display: block;"></a>
            </div>
        </form>
  </div> 

• Controller：

  WordToPDF:

/// <summary>
/// 将office文件转化为pdf文件，文件名称不变
/// </summary>
/// <param name="pdf2swfPath">pdf2swfPath工具所在路径</param>
/// <param name="OfficePath">office存储路径</param>
/// <param name="OfficeName">office文件名称</param>
/// <param name="destPath">pdf存储路径</param>
/// <returns>返回生成pdf的文件名,无效则返回空</returns>
private string OfficeToPdf(string OfficePath, string OfficeName, string destPath)
{
    string fullPathName = OfficePath + OfficeName;//包含 路径 的全称
    string fileNameWithoutEx = System.IO.Path.GetFileNameWithoutExtension(OfficeName);//不包含路径，不包含扩展名
    string extendName = System.IO.Path.GetExtension(OfficeName).ToLower();//文件扩展名
    string saveName = destPath + fileNameWithoutEx + ".pdf";
    string returnValue = fileNameWithoutEx + ".pdf";

    Microsoft.Office.Interop.Word.WdExportFormat exportFormat = Microsoft.Office.Interop.Word.WdExportFormat.wdExportFormatPDF;
    Microsoft.Office.Interop.Word.ApplicationClass application = null;

    Microsoft.Office.Interop.Word.Document document = null;
    try
    {
        application = new Microsoft.Office.Interop.Word.ApplicationClass();
        application.Visible = false;
        document = application.Documents.Open(fullPathName);
        document.SaveAs();
        document.ExportAsFixedFormat(saveName, exportFormat);
        }
    catch (Exception e)
    {
        Console.WriteLine(e.Message);
    }
    finally
    {
        if (document != null)
        {
            document.Close();
            document = null;
        }
        if (application != null)
        {
            application.Quit();
            application = null;
        }
        GC.Collect();
        GC.WaitForPendingFinalizers();
        GC.Collect();
        GC.WaitForPendingFinalizers();
    }
    return returnValue;
}

PDFToswf

/// <summary>
/// 将pdf文件转化为swf文件，文件名称不变
/// </summary>
/// <param name="pdf2swfPath">pdf2swfPath工具所在路径</param>
/// <param name="PdfPath">pdf存储路径</param>
/// <param name="PdfName">pdf文件名称</param>
/// <param name="destPath">swf存储路径</param>
/// <returns></returns>
private string PdfToSwf(string pdf2swfPath, string PdfPath, string PdfName, string destPath)
{
    string fullPathName = PdfPath + PdfName;//包含 路径 的全称
    string fileNameWithoutEx = System.IO.Path.GetFileNameWithoutExtension(PdfName);//不包含路径，不包含扩展名
    string extendName = System.IO.Path.GetExtension(PdfName).ToLower();//文件扩展名
    string saveName = destPath + fileNameWithoutEx + ".swf";
    string returnValue = fileNameWithoutEx + ".swf"; ;
    if (extendName != ".pdf")
    {
        returnValue = "";
    }
    else
    {
        Process pc = new Process();

        string cmd = pdf2swfPath;
        string args = " -t " + fullPathName + " -s flashversion=9 -o " + saveName;
        try
        {
            ProcessStartInfo psi = new ProcessStartInfo(cmd, args);
            psi.WindowStyle = ProcessWindowStyle.Hidden;
            pc.StartInfo = psi;
            pc.Start();
            pc.WaitForExit();
        }
        catch (Exception ex)
        {
            throw new Exception(ex.Message);
        }
        finally
        {
            pc.Close();
            pc.Dispose();
        }
    }
    return returnValue;
}

• JS代码：

var target = "../../Content/TeaFile/SWF/成绩管理.swf";
var fp = new FlexPaperViewer(
                        ‘../../FlexPaper/FlexPaperViewer‘,
                        ‘viewerPlaceHolder‘, {
                            config: {
                                //SwfFile: escape($("#file").val()),  //
                                SwfFile: escape(target),
                                Scale: 0.6,
                                ZoomTransition: ‘easeOut‘,
                                ZoomTime: 0.5,
                                ZoomInterval: 0.2,
                                FitPageOnLoad: true,
                                FitWidthOnLoad: false,
                                PrintEnabled: true,
                                FullScreenAsMaxWindow: false,
                                ProgressiveLoading: false,
                                MinZoomSize: 0.2,
                                MaxZoomSize: 5,
                                SearchMatchAll: false,
                                InitViewMode: ‘Portrait‘,

                                ViewModeToolsVisible: true,
                                ZoomToolsVisible: true,
                                NavToolsVisible: true,
                                CursorToolsVisible: true,
                                SearchToolsVisible: true,

                                localeChain: ‘en_US‘
                            }
                        });

预览效果图：

至此为止，Office的上传和预览就完成了。如果发现更好的方法，欢迎大家交流、批评、指正。