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 53: 
Line 54: 
Line 55:         foreach (DataRow dr in banner.Rows)
Line 56:         {
Line 57:             strVideos += @"<div class='col-lg-6'>

Source File: c:\aghayemoshaver.com\wwwroot\TeacherView.aspx.cs    Line: 55

Stack Trace:


[NullReferenceException: Object reference not set to an instance of an object.]
   TeacherView.Render(Int32 id) in c:\aghayemoshaver.com\wwwroot\TeacherView.aspx.cs:55
   TeacherView.Page_Load(Object sender, EventArgs e) in c:\aghayemoshaver.com\wwwroot\TeacherView.aspx.cs:41
   System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +51
   System.Web.UI.Control.OnLoad(EventArgs e) +95
   System.Web.UI.Control.LoadRecursive() +59
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +678


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.7.4081.0