System.NullReferenceException in System.Core.dll at end of MainWindow() Constructor (C# WPF)

Question

I have a simple Window in C# with some elements in it. When i try to run it i get a "System.NullReferenceException in System.Core.dll". In debugging the Exception is raised at the end of the MainWindow-Constructor (where the brackets are)

public MainWindow()
    {
        System.Threading.Thread.CurrentThread.CurrentUICulture = new System.Globalization.CultureInfo("de-DE");
        InitializeComponent();
        user = System.Security.Principal.WindowsIdentity.GetCurrent().Name;
        handler = new DataHandlerPlants();
        tbTransponder.Focus();
        loadgrid(); //gets grid-Items from DB
        loadComboboxes(); //gets combobox-Items from DB
    } //Here is where the exception is raised

What could be causing this?

@AleksAndreev I already read the answers, but there is nothing that could fit here — uwieuwe4, Jun 17 '18 at 17:50
There is not enough information, put here full exception stack trace — chromigo, Jun 17 '18 at 17:55

score 0 · Answer 1 · answered Jun 17 '18 at 18:04

0

Just realised the problem:

I added grouping to a GridView but the column by which should be grouped is not available.

answered Jun 17 '18 at 18:04

uwieuwe4

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System.NullReferenceException in System.Core.dll at end of MainWindow() Constructor (C# WPF)

1 Answers1