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 101:                Dim context As New jdartEntities
Line 102:                Dim QueryResult = (From p In context.course Where p.IDcourse = ID).FirstOrDefault()
Line 103:                Me.HeadDetailsNews.Text = QueryResult.namecourse
Line 104:                Me.Page.Title = QueryResult.namecourse
Line 105:                Me.ltrbody.Text = QueryResult.aboutcourse

Source File: D:\inetpub\vhosts\jdart.ir\httpdocs\English.aspx.vb    Line: 103

Stack Trace:


[NullReferenceException: Object reference not set to an instance of an object.]
   English.News_Load(Object sender, EventArgs e) in D:\inetpub\vhosts\jdart.ir\httpdocs\English.aspx.vb:103
   System.Web.UI.Control.OnLoad(EventArgs e) +107
   System.Web.UI.Control.LoadRecursive() +89
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1532


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.8.4465.0