PS:公司的业务中有个超级大的作业就是把OFFICE文档转成PDF,我猜之前没程序猿们，公司那些人应该是一个个手动转。强烈为猿们感叹，帮你们做了这么多事，还在那抱怨....无法满足你们的需求啊；

微软net平台提供了对Office文档非常好的支持；其中有com组件直接集成到了VS中。利用这些API可以快速的免去N多繁琐的工作；

以下代码是翻阅了公司的代码，一个个敲出来的；奉上代码：

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;
using Microsoft.Office.Interop.Excel;
//Office 命名空间
namespace OfficeToPdf
{
  //excel 类
  class ExcelConverter
  {
    //构造函数
    public ExcelConverter()
    { }
    /// <summary>
    /// 转换excel 成PDF文档
    /// </summary>
    /// <param name="_l【转自：http://www.1234xp.com/kt.html 转载请说明出处】strInputFile">原文件路径</param>
    /// <param name="_lstrOutFile">pdf文件输出路径</param>
    /// <returns>true 成功</returns>
    public bool ConverterToPdf(string _lstrInputFile,string _lstrOutFile)
    {
      Microsoft.Office.Interop.Excel.Application lobjExcelApp = null;      
      Microsoft.Office.Interop.Excel.Workbooks lobjExcelWorkBooks = null;
      Microsoft.Office.Interop.Excel.Workbook lobjExcelWorkBook = null;
      string lstrTemp = string.Empty;
      object lobjMissing = System.Reflection.Missing.Value;
      try
      {
        lobjExcelApp = new Microsoft.Office.Interop.Excel.Application();
        lobjExcelApp.Visible = true;
        lobjExcelWorkBooks = lobjExcelApp.Workbooks;
        lobjExcelWorkBook = lobjExcelWorkBooks.Open(_lstrInputFile, true, true, lobjMissing, lobjMissing, lobjMissing, true,
          lobjMissing, lobjMissing, lobjMissing, lobjMissing, lobjMissing, false, lobjMissing, lobjMissing);
        //Microsoft.Office.Interop.Excel 12.0.0.0之后才有这函数      
        lstrTemp = System.IO.Path.GetTempPath() + Guid.NewGuid().ToString() + ".xls" + (lobjExcelWorkBook.HasVBProject ? 'm' : 'x');
        //lstrTemp = System.IO.Path.GetTempPath() + Guid.NewGuid().ToString() + ".xls";
        lobjExcelWorkBook.SaveAs(lstrTemp, Microsoft.Office.Interop.Excel.XlFileFormat.xlExcel4Workbook, Type.Missing, Type.Missing, Type.Missing, false, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlNoChange, Type.Missing,
          false, Type.Missing, Type.Missing, Type.Missing);
        //输出为PDF 第一个选项指定转出为PDF,还可以指定为XPS格式
        lobjExcelWorkBook.ExportAsFixedFormat(Microsoft.Office.Interop.Excel.XlFixedFormatType.xlTypePDF, _lstrOutFile, Microsoft.Office.Interop.Excel.XlFixedFormatQuality.xlQualityStandard, Type.Missing, false, Type.Missing, Type.Missing, false, Type.Missing);
        lobjExcelWorkBooks.Close();
        lobjExcelApp.Quit();
      }
      catch (Exception ex)
      {
        //其他日志操作；
        return false;
      }
      finally {
        if (lobjExcelWorkBook != null)
        {
          lobjExcelWorkBook.Close(Type.Missing,Type.Missing,Type.Missing);
          Marshal.ReleaseComObject(lobjExcelWorkBook);
          lobjExcelWorkBook = null;
        }
        if(lobjExcelWorkBooks != null)
        {
          lobjExcelWorkBooks.Close();
          Marshal.ReleaseComObject(lobjExcelWorkBooks);
          lobjExcelWorkBooks = null;
        }
        if(lobjExcelApp != null)
        {
          lobjExcelApp.Quit();
          Marshal.ReleaseComObject(lobjExcelApp);
          lobjExcelApp = null;
        } 
        //主动激活垃圾回收器，主要是避免超大批量转文档时，内存占用过多，而垃圾回收器并不是时刻都在运行！
        GC.Collect();
        GC.WaitForPendingFinalizers();
      }
      return true;
    }
  }
}

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