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 64:             Dim FACKOP As New clsFacKop
Line 65:             Dim BP As New BasePage
Line 66:             FACKOP.dt = FACKOP.sFacKopByFacKopID(iFacKopID, BP.iPartijIDBeheerder)
Line 67:             If FACKOP.dt.Rows.Count > 0 Then
Line 68:                 FACKOP.dr = FACKOP.dt.Rows(0)

Source File: D:\internet\caffedono\Bevestiging.aspx.vb    Line: 66

Stack Trace:


[FormatException: Input string was not in a correct format.]
   Microsoft.VisualBasic.CompilerServices.Conversions.ParseDecimal(String Value, NumberFormatInfo NumberFormat) +326
   Microsoft.VisualBasic.CompilerServices.Conversions.ToLong(String Value) +83

[InvalidCastException: Conversion from string "koffiebonen-ook-gemalen" to type 'Long' is not valid.]
   Microsoft.VisualBasic.CompilerServices.Conversions.ToLong(String Value) +311
   Bevestiging.Page_Load(Object sender, EventArgs e) in D:\internet\caffedono\Bevestiging.aspx.vb:66
   System.Web.UI.Control.OnLoad(EventArgs e) +106
   System.Web.UI.Control.LoadRecursive() +68
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +3785


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.7.3930.0