我在我的asp.net(vb)网站上发现了7个错误.在我按照this SO帖子添加了对Microsoft Office 12.0对象库的引用之后,我试图读取单个excel表格单元格.现在整个网站都无法建立.关于这一点最令人惊讶的是,当我在我的项目中不需要它时,为什么我得到与水晶报告相关的错误？

以下是7个错误：

Error   Unknown server tag 'CR:CrystalReportViewer'.    C:\Users\ssaa\Documents\Visual Studio 2010\WebSites\Dpp2012\aspnet_client\system_web\4_0_30319\crystalreportviewers13\preview.aspx  130 

Error   Could not load file or assembly 'CrystalDecisions.Web, Version=12.0.2000.0, Culture=neutral, PublicKeyToken=692fbea5521e1304' or one of its dependencies. The system cannot find the file specified.    C:\Users\ssaa\Documents\Visual Studio 2010\WebSites\Dpp2012\aspnet_client\system_web\4_0_30319\crystalreportviewers13\preview.aspx  3   

Error   Could not load file or assembly 'CrystalDecisions.ReportSource, Version=12.0.2000.0, Culture=neutral, PublicKeyToken=692fbea5521e1304' or one of its dependencies. The system cannot find the file specified.   C:\Users\ssaa\Documents\Visual Studio 2010\WebSites\Dpp2012\aspnet_client\system_web\4_0_30319\crystalreportviewers13\preview.aspx  6   

Error   Could not load file or assembly 'CrystalDecisions.ReportAppServer.XmlSerialize, Version=12.0.2000.0, Culture=neutral, PublicKeyToken=692fbea5521e1304' or one of its dependencies. The system cannot find the file specified.   C:\Users\ssaa\Documents\Visual Studio 2010\WebSites\Dpp2012\aspnet_client\system_web\4_0_30319\crystalreportviewers13\preview.aspx  7   

Error   Could not load file or assembly 'CrystalDecisions.ReportAppServer.ObjectFactory, Version=12.0.2000.0, Culture=neutral, PublicKeyToken=692fbea5521e1304' or one of its dependencies. The system cannot find the file specified.  C:\Users\ssaa\Documents\Visual Studio 2010\WebSites\Dpp2012\aspnet_client\system_web\4_0_30319\crystalreportviewers13\preview.aspx  8   

Error   Could not load file or assembly 'CrystalDecisions.ReportAppServer.Controllers, Version=12.0.2000.0, Culture=neutral, PublicKeyToken=692fbea5521e1304' or one of its dependencies. The system cannot find the file specified.    C:\Users\ssaa\Documents\Visual Studio 2010\WebSites\Dpp2012\aspnet_client\system_web\4_0_30319\crystalreportviewers13\preview.aspx  4   

Error   Could not load file or assembly 'CrystalDecisions.CrystalReports.Engine, Version=12.0.2000.0, Culture=neutral, PublicKeyToken=692fbea5521e1304' or one of its dependencies. The system cannot find the file specified.  C:\Users\ssaa\Documents\Visual Studio 2010\WebSites\Dpp2012\aspnet_client\system_web\4_0_30319\crystalreportviewers13\preview.aspx  5   

任何帮助将非常欢迎！

[Windows Partition]:\Windows\Microsoft.NET\Framework\v4.0.30319\ASP.NETClientFiles\crystalreportviewers13\