Error.

ErrorMessage:Object reference not set to an instance of an object.

ErrorStackTrace: at AppProject.UILibrary.Controllers.DownCenterController.ReadData() in M:\WebSites\aspnet\S_SaaS项目管理平台\SaaSProjects\StandardSiteProject\Projects\CoreLibrary\AppProject.UILibrary\Controllers\DownCenterController.cs:line 31 at AppProject.UILibrary.Controllers.DownCenterController.Show() in M:\WebSites\aspnet\S_SaaS项目管理平台\SaaSProjects\StandardSiteProject\Projects\CoreLibrary\AppProject.UILibrary\Controllers\DownCenterController.cs:line 93

ErrorSource:AppProject.UILibrary