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 49:             hidFacKopID.Value = iFacKopID
Line 50:             Dim BP As New BasePage
Line 51:             FACKOP.dt = FACKOP.sFacKopByFacKopID(iFacKopID)
Line 52:             If FACKOP.dt.Rows.Count > 0 Then
Line 53:                 drFK = FACKOP.dt.Rows(0)

Source File: D:\internet\levendtheater\Bevestiging.aspx.vb    Line: 51

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 "bloemenpracht" to type 'Long' is not valid.]
   Microsoft.VisualBasic.CompilerServices.Conversions.ToLong(String Value) +311
   Bevestiging.Page_Load(Object sender, EventArgs e) in D:\internet\levendtheater\Bevestiging.aspx.vb:51
   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