[PathTooLongException: 指定的路径或文件名太长，或者两者都太长。完全限定文件名必须少于 260 个字符，并且目录名必须少于 248 个字符。]
   System.IO.Path.SafeSetStackPointerValue(Char* buffer, Int32 index, Char value) +7494089
   System.IO.Path.NormalizePathFast(String path, Boolean fullCheck) +387
   System.IO.Path.NormalizePath(String path, Boolean fullCheck) +36
   System.IO.Path.GetFullPathInternal(String path) +21
   System.Security.Util.StringExpressionSet.CanonicalizePath(String path, Boolean needFullPath) +73
   System.Security.Util.StringExpressionSet.CreateListFromExpressions(String[] str, Boolean needFullPath) +278
   System.Security.Permissions.FileIOPermission.AddPathList(FileIOPermissionAccess access, AccessControlActions control, String[] pathListOrig, Boolean checkForDuplicates, Boolean needFullPath, Boolean copyPathList) +87
   System.Security.Permissions.FileIOPermission..ctor(FileIOPermissionAccess access, String path) +65
   System.Web.InternalSecurityPermissions.PathDiscovery(String path) +29
   System.Web.HttpRequest.MapPath(VirtualPath virtualPath, VirtualPath baseVirtualDir, Boolean allowCrossAppMapping) +146
   System.Web.HttpRequest.MapPath(VirtualPath virtualPath) +37
   System.Web.HttpServerUtility.MapPath(String path) +99
   player.Page_Load(Object sender, EventArgs e) in F:\vhost-website\xsc-新版\player.ascx.vb:79
   System.Web.UI.Control.OnLoad(EventArgs e) +99
   System.Web.UI.Control.LoadRecursive() +50
   System.Web.UI.Control.LoadRecursive() +141
   System.Web.UI.Control.LoadRecursive() +141
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +627