null object cannot be converted to a value type - Templates, (partial) views and macros

Press Ctrl / CMD + C to copy this to your clipboard.

Copied to clipboard

Flag this post as spam?

This post will be reported to the moderators as potential spam to be looked at

Paul Griffiths 370 posts 1021 karma points

Aug 26, 2016 @ 18:56
0

Null object cannot be converted to a value type.
Hi All,

All of a sudden i am receiving the following error when trying to get a crop from my image cropper data type.

My code is as follows, is this the correct way to call the crop? My property is called image and my prop alias is latestNewsCrop.
```
    @foreach (var newsItem in Model.Content.Children.OrderBy("CreateDate desc"))

{
                            <a href="@newsItem.Url" title="@newsItem.Name">
                                <img src="@(newsItem.HasValue("image") ? newsItem.GetCropUrl("image", "latestNewsCrop") : placeHolderImage)" class="img-responsive" alt="" title="">
                            </a>

}
```
The error i get is as follows

Anyone help?

Thanks Paul
Copy Link

Paul Griffiths 370 posts 1021 karma points

Aug 26, 2016 @ 19:23

Maybe its related to this? http://issues.umbraco.org/issue/U4-8769

{
  "focalPoint": {
    "left": null,
    "top": null
  },
  "src": "/media/1021/img_5512.jpg",
  "crops": [
    {
      "alias": "latestNewsCrop",
      "width": 800,
      "height": 300,
      "coordinates": {
        "x1": 5.0527483431829317E-16,
        "y1": 0.28306712962962971,
        "x2": 0,
        "y2": 0.15443287037037051
      }
    }
  ]
}

Anyone had this?

Copy Link

Dan Diplo 1554 posts 6205 karma points MVP 6x c-trib

Aug 26, 2016 @ 21:28

0

I think it is related to that. I'd upvote the issue if you can.

Copy Link
Paul Griffiths 370 posts 1021 karma points

Aug 27, 2016 @ 07:04

0

Hi,

Thanks for getting back, as strange as this may sound I've just moved the blue focal point on the image that was uploaded and then re cropped the image using latestNewsCrop, republished and it now renders!

Really don't know what's going on - seems quite buggy

Paul

Copy Link
Dan Diplo 1554 posts 6205 karma points MVP 6x c-trib

Aug 27, 2016 @ 09:51

0

No, doesn't sound strange, as I've encountered the same. Sometimes the focal point "shoots off" which results in a null position being set. This is turn causes the property converter (that takes the JSON that is stored in Umbraco and converts it back to an ImageCropDataSet object) to throw the exception you saw.

I'd just urge people to vote for the issue at http://issues.umbraco.org/issue/U4-8769 so the core team see it as important.

Copy Link
is working on a reply...

Please Sign in or register to post replies

Flag this post as spam?

Null object cannot be converted to a value type.