Server Error in '/' Application.

Input string was not in a correct format.

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.FormatException: Input string was not in a correct format.

Source Error:


Line 54: 	
Line 55:     dim productID as integer = pidA
Line 56:     dim quantita as integer = qidA
Line 57: 	
Line 58: 	if Request.Cookies("username") Is Nothing Then

Source File: D:\inetpub\webs\ufficioinnet\head.ascx    Line: 56

Stack Trace:


[FormatException: Input string was not in a correct format.]
   Microsoft.VisualBasic.CompilerServices.Conversions.ParseDouble(String Value, NumberFormatInfo NumberFormat) +224
   Microsoft.VisualBasic.CompilerServices.Conversions.ToInteger(String Value) +92

[InvalidCastException: Conversion from string "quant_668" to type 'Integer' is not valid.]
   Microsoft.VisualBasic.CompilerServices.Conversions.ToInteger(String Value) +248
   ASP.head_ascx.Page_Load() in D:\inetpub\webs\ufficioinnet\head.ascx:56
   System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +9850910
   System.Web.UI.Control.OnLoad(EventArgs e) +97
   System.Web.UI.Control.LoadRecursive() +61
   System.Web.UI.Control.LoadRecursive() +134
   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