Server Error in '/' Application.

Object reference not set to an instance of an object.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.

Source Error:


Line 409:
Line 410:
Line 411:        DataTable dtPosition = TypeUtils.InvokeDataTableMethod3("StylesDrop.Layout" + "DEFAULT", "StylesDrop.Layout" + "DEFAULT", Class, "getData");
Line 412:        DataTable dtTemp = new DataTable();
Line 413:        dtTemp.Columns.Add("Group", typeof(string));

Source File: c:\inetpub\vhosts\thienminhnewsky.edu.vn\alobatdongsan.vn\MasterPage.master.cs    Line: 411

Stack Trace:


[NullReferenceException: Object reference not set to an instance of an object.]
   TypeUtils.InvokeDataTableMethod3(String assemblyName, String namespaceName, String typeName, String methodName) +137
   MasterPage.Page_Init(Object sender, EventArgs e) in c:\inetpub\vhosts\thienminhnewsky.edu.vn\alobatdongsan.vn\MasterPage.master.cs:411
   System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +52
   System.Web.UI.Control.OnInit(EventArgs e) +97
   System.Web.UI.UserControl.OnInit(EventArgs e) +87
   System.Web.UI.Control.InitRecursive(Control namingContainer) +142
   System.Web.UI.Control.InitRecursive(Control namingContainer) +318
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +416


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.8.4494.0