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 70:         string query = "select * from products where id=@a";
Line 71:         SqlCommand scon = new SqlCommand(query, conn);
Line 72:         scon.Parameters.AddWithValue("@a", Page.RouteData.Values["id"].ToString());
Line 73:         SqlDataReader dr_seo = scon.ExecuteReader();
Line 74:         dr_seo.Read();

Source File: d:\hostingspaces\ultrastore.ir\httpdocs\products.aspx.cs    Line: 72

Stack Trace:


[NullReferenceException: Object reference not set to an instance of an object.]
   products.Page_Load(Object sender, EventArgs e) in d:\hostingspaces\ultrastore.ir\httpdocs\products.aspx.cs:72
   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