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 149:            string query = "SELECT count(id) as bom FROM [basket] where guid=@a and uid=0";
Line 150:            SqlCommand scon = new SqlCommand(query, conn);
Line 151:            scon.Parameters.AddWithValue("@a", Request.Cookies["shoppingcart"].Value.ToString());
Line 152:            SqlDataReader dr_basket = scon.ExecuteReader();
Line 153:            if (dr_basket.Read())

Source File: d:\hostingspaces\mobileistore.ir\httpdocs\products.aspx.cs    Line: 151

Stack Trace:


[NullReferenceException: Object reference not set to an instance of an object.]
   products.basket() in d:\hostingspaces\mobileistore.ir\httpdocs\products.aspx.cs:151
   products.Page_Load(Object sender, EventArgs e) in d:\hostingspaces\mobileistore.ir\httpdocs\products.aspx.cs:88
   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