C#将Excel转成PDF的方法

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="_lstrinputfile">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;
    }
  }
}

总结

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