Server Error in '/' Application.

Value cannot be null.
Parameter name: String

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.ArgumentNullException: Value cannot be null.
Parameter name: String

Source Error:


Line 14: 
Line 15:         Dim CultureName As String = Session("CultureName")
Line 16:         CategoryID = Integer.Parse(Request.QueryString("CategoryID"))
Line 17:         Session("CategoryID") = CType(CategoryID, String)
Line 18: 

Source File: E:\web\freepuzz\Puzzles\PuzzleIndex.aspx.vb    Line: 16

Stack Trace:


[ArgumentNullException: Value cannot be null.
Parameter name: String]
   System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal) +13033611
   System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info) +122
   System.Int32.Parse(String s) +26
   Puzzles_PuzzleIndex.Page_Load(Object sender, EventArgs e) in E:\web\freepuzz\Puzzles\PuzzleIndex.aspx.vb:16
   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:4.8.4676.0