[SOLVED] calculation on dates with TimeSpan

I am still new with asprunner.net and C# :-(

I need to calculate on dates but every time i try to use C# functions i get errors compiling or errors when the pages open.

ex.
On Process Record Values event
the table have to date fields values["slutdato"] and values["startdato"]

I need to calculate the difference in months and save it in another field - my code are:

TimeSpan ts = values["slutdato"] - values["startdato"];
values["fleasperiode"] = ts.Days/30.436875;

compiling is no problem but opening the page gives folowing error:


[ArgumentException: Value is outside expected area.]
runnerDotNet.XVar.op_Subtraction(XVar x, XVar y) in c:\Users\micha\Documents\ASPRunnerNETProjects\ERP-LeaseBil.nu\output\Classes\XVar.cs:319
System.Dynamic.UpdateDelegates.UpdateAndExecute2(CallSite site, T0 arg0, T1 arg1) +450
runnerDotNet.eventclassCS_bilsager.ProcessValuesEdit(Object values, Object pageObject) in c:\Users\micha\Documents\ASPRunnerNETProjects\ERP-LeaseBil.nu\output\include\bilsager_TableEvents.cs:265
System.Dynamic.UpdateDelegates.UpdateAndExecute3(CallSite site, T0 arg0, T1 arg1, T2 arg2) +714
runnerDotNet.eventclass_bilsager.ProcessValuesEdit(Object values, Object pageObject) in c:\Users\micha\Documents\ASPRunnerNETProjects\ERP-LeaseBil.nu\output\include\bilsager_EventsAggregator.cs:150
CallSite.Target(Closure , CallSite , Object , XVar , EditPage ) +159
System.Dynamic.UpdateDelegates.UpdateAndExecuteVoid3(CallSite site, T0 arg0, T1 arg1, T2 arg2) +699
runnerDotNet.EditPage.getFieldControlsData() in c:\Users\micha\Documents\ASPRunnerNETProjects\ERP-LeaseBil.nu\output\Classes\editpage.cs:1604
runnerDotNet.EditPage.prepareEditControls() in c:\Users\micha\Documents\ASPRunnerNETProjects\ERP-LeaseBil.nu\output\Classes\editpage.cs:978
runnerDotNet.EditPage.process() in c:\Users\micha\Documents\ASPRunnerNETProjects\ERP-LeaseBil.nu\output\Classes\editpage.cs:272
CallSite.Target(Closure , CallSite , Object ) +95
System.Dynamic.UpdateDelegates.UpdateAndExecuteVoid1(CallSite site, T0 arg0) +651
runnerDotNet.bilsagerController.edit() in c:\Users\micha\Documents\ASPRunnerNETProjects\ERP-LeaseBil.nu\output\Controllers\bilsager\edit.cs:433
lambda_method(Closure , ControllerBase , Object[] ) +62
System.Web.Mvc.ActionMethodDispatcher.Execute(ControllerBase controller, Object[] parameters) +14
System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters) +182
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +27
System.Web.Mvc.<>c__DisplayClass15.<InvokeActionMethodWithFilters>b__12() +56
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation) +256
System.Web.Mvc.<>c__DisplayClass17.<InvokeActionMethodWithFilters>b__14() +22
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodWithFilters(ControllerContext controllerContext, IList`1 filters, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +190
System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName) +311
System.Web.Mvc.Controller.ExecuteCore() +105
runnerDotNet.BaseController.ExecuteThread(Object arg) in c:\Users\micha\Documents\ASPRunnerNETProjects\ERP-LeaseBil.nu\output\Controllers\BaseController.cs:45