小编Che*_*hen的帖子

对此我不知所措,昨天它工作正常,今天它似乎被破坏了:

这一行产生错误:

@if (Roles.IsUserInRole(HttpContext.Current.User.Identity.Name, "Admin"))

错误是:无法连接到SQL Server数据库.

整个例外:

System.Web.HttpException was unhandled by user code
  HResult=-2147467259
  Message=Unable to connect to SQL Server database.
  Source=System.Web
  ErrorCode=-2147467259
  WebEventCode=0
  StackTrace:
       at System.Web.DataAccess.SqlConnectionHelper.CreateMdfFile(String fullFileName, String dataDir, String connectionString)
       at System.Web.DataAccess.SqlConnectionHelper.EnsureDBFile(String connectionString)
       at System.Web.DataAccess.SqlConnectionHelper.GetConnection(String connectionString, Boolean revertImpersonation)
       at System.Web.Security.SqlRoleProvider.GetRolesForUser(String username)
       at WebMatrix.WebData.SimpleRoleProvider.GetRolesForUser(String username)
       at System.Web.Security.RolePrincipal.IsInRole(String role)
       at System.Web.Security.Roles.IsUserInRole(String username, String roleName)
       at ASP._Page_Views_Shared__LoginPartial_cshtml.Execute() in e:\LeasingWeb\LeasingWeb\Views\Shared\_LoginPartial.cshtml:line 10
       at System.Web.WebPages.WebPageBase.ExecutePageHierarchy()
       at System.Web.Mvc.WebViewPage.ExecutePageHierarchy()
       at System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage)
       at System.Web.Mvc.RazorView.RenderView(ViewContext viewContext, TextWriter writer, Object instance)
       at System.Web.Mvc.BuildManagerCompiledView.Render(ViewContext …

我在寻找是否甚至有可能遇到问题（在任何地方都找不到信息）。在视频上传过程中是否可以提取帧（缩略图）？如果可以提取用户端，则使用jscript提取也是一个选项。

谢谢您的帮助！