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 165:            string query = "delete b from shopbasket b INNER JOIN shopproducts p on p.id=b.pid where @id=b.guid and p.count<b.count";
Line 166:            SqlCommand scon = new SqlCommand(query, conn);
Line 167:            scon.Parameters.AddWithValue("@id", Request.Cookies["shoppingcart"].Value.ToString());
Line 168:            SqlDataReader dr = scon.ExecuteReader();
Line 169:            dr.Read();

Source File: d:\hostingspaces\justspeak.ir\httpdocs\cart.aspx.cs    Line: 167

Stack Trace:


[NullReferenceException: Object reference not set to an instance of an object.]
   cart.deleteshopbasket() in d:\hostingspaces\justspeak.ir\httpdocs\cart.aspx.cs:167
   cart.Page_Load(Object sender, EventArgs e) in d:\hostingspaces\justspeak.ir\httpdocs\cart.aspx.cs:39
   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:4.8.4700.0