winform把Office转成PDF文件

先要把word或ppt转换为pdf； 以pdf的格式展示，防止文件拷贝。

转换方法

1、安装Word、Excel、PowerPoint组件

注意：需安装Microsoft.Office.Interop.Word\Excel\PowerPoint组件。

程序集如下：

2、转换代码

（1）将Word转换为pdf： 

using Microsoft.Office.Core;
using System;
using System.IO;
using System.Windows.Forms;
using Excel = Microsoft.Office.Interop.Excel;
using PowerPoint = Microsoft.Office.Interop.PowerPoint;
using Word = Microsoft.Office.Interop.Word;

namespace WindowsFormsApp4
{
   public partial class Form1 : Form
   {
       public Form1()
       {
           InitializeComponent();
       }

private void Form1_Load(object sender, EventArgs e)
       {
           bool isSuccess = DOCConvertToPDF(Directory.GetCurrentDirectory() + "\\aa.docx", Directory.GetCurrentDirectory() + "\\aa.pdf");
           if (isSuccess)
           {
               pdfViewer1.LoadFromFile(Directory.GetCurrentDirectory() + "\\aa.pdf");
           }
       }

/// <summary>
       /// Word转换成pdf
       /// </summary>
       /// <param name="sourcePath">源文件路径</param>
       /// <param name="targetPath">目标文件路径</param>
       /// <returns>true=转换成功</returns>
       public static bool DOCConvertToPDF(string sourcePath, string targetPath)
       {
           bool result = false;
           Word.Application app = new Word.Application();
           Word.Document doc = null;
           object missing = System.Reflection.Missing.Value;
           object saveChanges = Word.WdSaveOptions.wdDoNotSaveChanges;
           try
           {
               app.Visible = false;
               doc = app.Documents.Open(sourcePath);
               doc.ExportAsFixedFormat(targetPath, Word.WdExportFormat.wdExportFormatPDF);
               result = true;
           }
           catch (Exception ex)
           {
               result = false;
               throw new ApplicationException(ex.Message);
           }
           finally
           {
               if (doc != null)
               {
                   doc.Close(ref saveChanges, ref missing, ref missing);
                   doc = null;
               }
               if (app != null)
               {
                   app.Quit(ref missing, ref missing, ref missing);
                   app = null;
               }
               GC.Collect();
               GC.WaitForPendingFinalizers();
           }
           return result;
       }

}
}

（2）把Excel文件转换成PDF格式文件

/// <summary>
/// 把Excel文件转换成PDF格式文件
/// </summary>
/// <param name="sourcePath">源文件路径</param>
/// <param name="targetPath">目标文件路径</param>
/// <returns>true=转换成功</returns>
public static bool XLSConvertToPDF(string sourcePath, string targetPath)
{
   bool result = false;
   Excel.XlFixedFormatType targetType = Excel.XlFixedFormatType.xlTypePDF;
   object missing = Type.Missing;
   Excel.Application app = null;
   Excel.Workbook book = null;
   try
   {
       app = new Excel.Application();
       object target = targetPath;
       object type = targetType;
       book = app.Workbooks.Open(sourcePath, missing, missing, missing, missing, missing,
       missing, missing, missing, missing, missing, missing, missing, missing, missing);
       book.ExportAsFixedFormat(targetType, target, Excel.XlFixedFormatQuality.xlQualityStandard, true, false, missing, missing, missing, missing);
       result = true;
   }
   catch (Exception ex)
   {
       result = false;
       throw new ApplicationException(ex.Message);
   }
   finally
   {
       if (book != null)
       {
           book.Close(true, missing, missing);
           book = null;
       }
       if (app != null)
       {
           app.Quit();
           app = null;
       }
       GC.Collect();
       GC.WaitForPendingFinalizers();
   }
   return result;
}

（3）把PowerPoint文件转换成PDF格式文件

///<summary>
/// 把PowerPoint文件转换成PDF格式文件
///</summary>
///<param name="sourcePath">源文件路径</param>
///<param name="targetPath">目标文件路径</param>
///<returns>true=转换成功</returns>
public static bool PPTConvertToPDF(string sourcePath, string targetPath)
{
   bool result = false;

PowerPoint.PpSaveAsFileType targetFileType = PowerPoint.PpSaveAsFileType.ppSaveAsPDF;
   object missing = Type.Missing;
   PowerPoint.Application app = null;
   PowerPoint.Presentation pres = null;
   try
   {
       app = new PowerPoint.Application();
       pres = app.Presentations.Open(sourcePath, MsoTriState.msoTrue, MsoTriState.msoFalse, MsoTriState.msoFalse);
       pres.SaveAs(targetPath, targetFileType, Microsoft.Office.Core.MsoTriState.msoTrue);
       result = true;
   }
   catch (Exception ex)
   {
       result = false;
       throw new ApplicationException(ex.Message);
   }
   finally
   {
       if (pres != null)
       {
           pres.Close();
           pres = null;
       }
       if (app != null)
       {
           app.Quit();
           app = null;
       }
       GC.Collect();
       GC.WaitForPendingFinalizers();
   }
   return result;
}

来源：https://www.cnblogs.com/springsnow/p/13305794.html