Server Error in '/' Application.

Object reference not set to an instance of an object.

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.NullReferenceException: Object reference not set to an instance of an object.

Source Error:



An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:


[NullReferenceException: Object reference not set to an instance of an object.]
   Transtat_podstawa.DataProvider.GenerateDashboardCards() +82
   Transtat_podstawa.DataProvider.GetSampleData(Func`1 generateData) +126

[TargetInvocationException: Exception has been thrown by the target of an invocation.]
   System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor) +0
   System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments) +260
   System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) +142
   System.Web.UI.WebControls.ObjectDataSourceView.InvokeMethod(ObjectDataSourceMethod method, Boolean disposeInstance, Object& instance) +889
   System.Web.UI.WebControls.ObjectDataSourceView.ExecuteSelect(DataSourceSelectArguments arguments) +1829
   System.Web.UI.DataSourceView.Select(DataSourceSelectArguments arguments, DataSourceViewSelectCallback callback) +26
   DevExpress.Web.Internal.DataContainer.PerformSelect() +151
   DevExpress.Web.ASPxDataWebControlBase.DataBindInternal() +166
   DevExpress.Web.ASPxWebControl.DataBind() +50
   DevExpress.Web.Internal.DataHelperBase.EnsureDataBound(Boolean ensureChildControls) +74
   DevExpress.Web.Internal.DataContainer.EnsureDataBound() +154
   DevExpress.Web.ASPxDataWebControlBase.OnPreRender(EventArgs e) +26
   System.Web.UI.Control.PreRenderRecursiveInternal() +162
   System.Web.UI.Control.PreRenderRecursiveInternal() +256
   System.Web.UI.Control.PreRenderRecursiveInternal() +256
   System.Web.UI.Control.PreRenderRecursiveInternal() +256
   System.Web.UI.Control.PreRenderRecursiveInternal() +256
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +6875

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.7.4136.0