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 131:                btnBack.Visible = true;
Line 132:                btnBack.Text = "< TORNA ALLA SOLUZIONE";
Line 133:                String Titolo = ((Label)((GridViewRow)gvElencoSchedeSoluzioni.SelectedRow).FindControl("lblBtnSoluzioni")).Text.ToString();
Line 134:
Line 135:                btnBack.NavigateUrl = "~/soluzioni/" + gvElencoSchedeSoluzioni.SelectedValue.ToString() + "/" + Server.UrlPathEncode(StripHtml(Titolo).Replace("/", "").Replace(".", "").Replace("&amp;", "e").Replace("&", "e").Replace(" ", "-").Replace("\"", ""));

Source File: c:\inetpub\www\Shazam\soluzioni.aspx.cs    Line: 133

Stack Trace:


[NullReferenceException: Object reference not set to an instance of an object.]
   soluzioni.Page_Load(Object sender, EventArgs e) in c:\inetpub\www\Shazam\soluzioni.aspx.cs:133
   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:4.8.4690.0