无法转换类型为COM的对象 [英] Unable to cast COM object of type

问题描述

当我尝试在调试模式下运行代码时，出现以下错误..任何建议我该如何处理?谢谢

无法将类型为"Microsoft.Office.Interop.PowerPoint.ApplicationClass"的COM对象转换为类型为"Microsoft.Office.Interop.PowerPoint._Application"的接口.此操作失败，因为对IID为"{91493442-5A91-11CF-8700-00AA0060263B}"的接口的COM组件上的QueryInterface调用由于以下错误而失败:接口未注册(来自HRESULT的异常:0x80040155). > 
解决方案
 
无效的引用或对某些未注册程序集的引用都可能导致它.检查您是否引用了正确的Office Interop版本.
 
 
哪行会给您错误，您可以将其发布吗?
 
 
使用以下代码，可能会有所帮助你.



Microsoft.Office.Interop.PowerPoint.Application pptApplication = new Microsoft.Office.Interop.PowerPoint.Application();

Presentation pptPresentation = pptApplication.Presentations.Open("bigstory.ppt", MsoTriState.msoFalse, MsoTriState.msoFalse, MsoTriState.msoFalse);
 
 
 
When I try to run the code in debug mode I get following error ..any suggestion how can i take care of it? thanks 



Unable to cast COM object of type 'Microsoft.Office.Interop.PowerPoint.ApplicationClass' to interface type 'Microsoft.Office.Interop.PowerPoint._Application'. This operation failed because the QueryInterface call on the COM component for the interface with IID '{91493442-5A91-11CF-8700-00AA0060263B}' failed due to the following error: Interface not registered (Exception from HRESULT: 0x80040155).
解决方案
Invalid reference or reference to some unregistered assembly can cause it. Check if you are referencing correct version of Office Interop.

which line gives you error can you post it ?

Use following code, it might help you.



Microsoft.Office.Interop.PowerPoint.Application pptApplication = new Microsoft.Office.Interop.PowerPoint.Application();

Presentation pptPresentation = pptApplication.Presentations.Open("bigstory.ppt", MsoTriState.msoFalse, MsoTriState.msoFalse, MsoTriState.msoFalse);


                        
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