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 177:        {
Line 178:            var t = db.tag.Where(tt => tt.Id.ToString() == Request.Params["id"]).FirstOrDefault();
Line 179:            Response.Redirect("~/catalog/"+t.url+".aspx");
Line 180:        }
Line 181:        div1.Visible = true;

Source File: c:\inetpub\vhosts\u0825474.plsk.regruhosting.ru\roza-vetrov.info\catalog\default.aspx.cs    Line: 179

Stack Trace:


[NullReferenceException: Object reference not set to an instance of an object.]
   Catalog_Default.Page_Load(Object sender, EventArgs e) in c:\inetpub\vhosts\u0825474.plsk.regruhosting.ru\roza-vetrov.info\catalog\default.aspx.cs:179
   System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +52
   System.Web.UI.Control.OnLoad(EventArgs e) +97
   System.Web.UI.Control.LoadRecursive() +61
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +693


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.8.4682.0