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 613:    {
Line 614:        String catqrtstr = Request.QueryString["prdtcategory"].ToString();
Line 615:        String catmncatqrtstr = Request.QueryString["mncatid"].ToString();
Line 616:
Line 617:        String coname;

Source File: d:\inetpub\vhosts\herboera.com\httpdocs\main-product.aspx.cs    Line: 615

Stack Trace:


[NullReferenceException: Object reference not set to an instance of an object.]
   main_product.filcategoryname() in d:\inetpub\vhosts\herboera.com\httpdocs\main-product.aspx.cs:615
   main_product.Page_Load(Object sender, EventArgs e) in d:\inetpub\vhosts\herboera.com\httpdocs\main-product.aspx.cs:43
   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