嘗試訪問字段時ADODB失敗

Question

我正在使用CDO和ADODB生成SMIL用於發送MMS消息。一切工作正常，但（我認爲）某些Windows Server後，2008 R2更新，事情就停止了這個工作的錯誤：

Unable to cast COM object of type 'System.__ComObject' to interface type 'ADODB.Fields'. This operation failed because the QueryInterface call on the COM component for the interface with IID '{00001564-0000-0010-8000-00AA006D2EA4}' failed due to the following error: No such interface supported (Exception from HRESULT: 0x80004002 (E_NOINTERFACE)).

這裏就是它打破：

private const string mcCDOContentLocation = 
    "urn:schemas:mailheader:content-location"; 

part.Fields[mcCDOContentLocation].Value = "SMIL"; 

任何想法？也許有關如何生成SMIL文檔的替代方法？

Answer 1

如果有些人有同樣的問題，微軟提供了一個向後兼容庫，這裏的解決方案：

An ADO application does not run on down-level operating systems after you recompile it on a computer that is running Windows 7 SP 1 or Windows Server 2008 R2 SP 1 or that has KB983246 installed