how to solve the object reference not set to an instance of an object?

Question

In my c# MVVM program. I set one observable collections. And I add to the image from the list. But i get Object reference not set to an instance of an object error.

   private ObservableCollection<SpecialAttractionImageModel> _SpecialAttractionImageModelObj = new ObservableCollection<SpecialAttractionImageModel>();

    public ObservableCollection<SpecialAttractionImageModel> SpecialAttractionImageModelObj
            {
                get { return _SpecialAttractionImageModelObj; }
                set
                {
                    _SpecialAttractionImageModelObj = value;
                    OnPropertyChanged("SpecialAttractionImageModelObj");
                }
            }

foreach (String file in fd.FileNames)
                    {
                        FileInfo currentFile = new FileInfo(file);
                        _SpecialAttractionImageModelObj.Add(new SpecialAttractionImageModel()
                        {
                            AttractionImageGid = "new",
                            SpecialAttracionImagePath = file,
                            IsChecked=false
                        });
                    }

you may want to show the complete exception details, it is not easy to see from the code you are providing — faljbour, Apr 27 '15 at 04:26
Yes, we especially need to know what line throws the exception. — DWright, Apr 27 '15 at 04:30
If you are using Visual Studio, during debug hover over each variable on that line and see which one is null. — Luke Franklin, Apr 27 '15 at 04:38
Why do you need a setter on the observablecollection, this is not normally needed. Because you have a private initializer, some code must set it to null explicitely. — Philip Stuyck, Apr 27 '15 at 05:10

score -1 · Answer 1 · answered Apr 27 '15 at 04:28

-1

Object is not initialized, maybe OnPropertyChanged("SpecialAttractionImageModelObj"); is the cause.

Stack Trace would help you figure out where this is happening.

answered Apr 27 '15 at 04:28

AliveTillYouLearn

1

how to solve the object reference not set to an instance of an object?

1 Answers1