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  • Dejan Stojanovic 12 posts 51 karma points
    May 15, 2019 @ 16:50
    Dejan Stojanovic
    0

    Reading Custom Media Image property throws System.ArgumentException

    I created custom Image in media which has some addition crop settings. I called this media type ArticleImage.

    Now when I try to read it in a partial view I am getting System.ArgumentException with the following message

    The value "Umbraco.Web.PublishedModels.ArticleImage" is not of type "Umbraco.Web.PublishedModels.Image" and cannot be used in this generic collection. Parameter name: value

    I tried using 

    @inherits Umbraco.Web.Mvc.UmbracoViewPage<dynamic>

    instead of default 

    @inherits Umbraco.Web.Mvc.UmbracoViewPage

    but I am still getting the same exception, like there is something wrong with Umbraco8 and custom media image type.

    Any idea how to resolve this?

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  • Claushingebjerg 939 posts 2574 karma points
    May 16, 2019 @ 12:23
    Claushingebjerg
    0

    what does your media type look like, and how are you trying to output it?

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  • Dejan Stojanovic 12 posts 51 karma points
    May 16, 2019 @ 16:02
    Dejan Stojanovic
    0

    Hi,

    Here is how the media type and the data type look like Custom Image Media type

    and the data type used for umbracoFile property enter image description here

    I am accessing it with an extension method I wrote

      public static String GetImageCropUrl(this IPublishedContent content, String propertyAlias, String cropAlias)
        {
            if (content.HasProperty(propertyAlias))
            {
                var umbHelper = Umbraco.Web.Composing.Current.UmbracoHelper;
                var propValue = content.GetProperty(propertyAlias).GetSourceValue();
                var media = umbHelper.Media(propValue);
                return media?.GetCropUrl(cropAlias);
            }
            return null;
        }

        public static String GetImageUrl(this IPublishedContent content, String propertyAlias)
        {
            if (content.HasProperty(propertyAlias))
            {
                var umbHelper = Umbraco.Web.Composing.Current.UmbracoHelper;
                var propValue = content.GetProperty(propertyAlias).GetSourceValue();
                return umbHelper.Media(propValue)?.Url;
            }
            return null;
        }

    I am getting exception in views where I am not eve trying to get the image crop path with extension method. For example I have document type Article which has a property of MediaPicker which is set to only pick ArtcleImage media and when I loop through children of parent of Artcle document I am getting the exception I mentioned above

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