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 51:             hidFacKopID.Value = iFacKopID
Line 52:             Dim BP As New BasePage
Line 53:             FACKOP.dt = FACKOP.sFacKopByFacKopID(iFacKopID, BP.iPartijIDBeheerder)
Line 54:             If FACKOP.dt.Rows.Count > 0 Then
Line 55:                 drFK = FACKOP.dt.Rows(0)

Source File: D:\internet\dahlair\Bevestiging.aspx.vb    Line: 53

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 "[a-z|0-9|-]*" to type 'Long' is not valid.]
   Microsoft.VisualBasic.CompilerServices.Conversions.ToLong(String Value) +311
   Bevestiging.Page_Load(Object sender, EventArgs e) in D:\internet\dahlair\Bevestiging.aspx.vb:53
   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