水晶报告错误在asp.net vb没有水晶报告需要
我在我的asp.net（vb）网站上遇到以下7个错误。他们是在我按照这个 SOpost添加了对Microsoft Office 12.0 Object Library的引用，然后尝试读取各个Excel工作表单元格。 现在整个网站无法build立。 最令人惊讶的是，为什么当我不需要在我的项目中，我得到一个与水晶报告相关的错误？
这里有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！
去这个位置
[Windows Partition]:\Windows\Microsoft.NET\Framework\v4.0.30319\ASP.NETClientFiles\crystalreportviewers13\
打开preview.aspx文件，并将12.0.2000.0更改为13.0.2000.0
有用 ;-）
除了在[Windows Partition]:\Windows\Microsoft.NET\Framework\v4.0.30319\ASP.NETClientFiles\crystalreportviewers13\文件夹中修复preview.aspx，您还应该在您的网站根目录中查找名为aspnet_client的文件夹并应用那里也是一样的变化。
如果您在IIS中使用多个网站而不是“默认网站”，则会将crystalreportviewers13文件夹复制到每个网站，因此请检查它们。