通过win32ole在ruby中打开powerpoint演示文稿

Question

我有一段适用于Excel的代码。

  require 'win32ole'
  excel = WIN32OLE.new('Excel.Application')
  excel.visible = true
  workbook = excel.Workbooks.Open('c:\file.xls');

但是我很难在PowerPoint上做同样的事情；下面这段代码：

  require 'win32ole'
  ppt = WIN32OLE.new('Powerpoint.Application')
  ppt.visible = true
  presentation = ppt.Presentations.Open('c:\file.pptx');

生成此错误：

filename.rb in `method_missing': (in OLE method `Open': ) (WIN32OLERuntimeError)
OLE error code:80004005 in <Unknown>
<No Description>
HRESULT error code:0x80020009
Exception occurred.

Microsoft Support site说唯一需要的参数是文件名。

Answer 1

我发现了一个丑陋的变通方法：

  require 'win32ole'
  require 'fileutils'

  ppt = WIN32OLE.new('PowerPoint.Application')
  ppt.visible = true
  system "start c:/presentation.ppt"
  puts ppt.ActivePresentation.Slides.Count()
  ppt.ActivePresentation.Slides(2).Export("filename.jpg", ".jpg", 1024,768)
  ppt.ActivePresentation.Close();

Answer 2

我等待了3秒，它就解决了这个问题

Answer 3

我得到了同样的错误，添加ppt.visible = true对我来说已经足够了。