C# parse JSON access to child object

Question

I have this JSON:

{
    "total": 23695,
    "total_pages": 1185,
    "results": [{
        "id": "r7bVvV7MLdQ",
        "created_at": "2018-01-17T06:38:03-05:00",
        "updated_at": "2018-05-09T03:35:24-04:00",
        "width": 4032,
        "height": 2526,
        "color": "#F7EDE7",
        "description": null,
        "urls": {
            "raw": "https://images.unsplash.com/photo-1516189050082-44d4deb5ceef?ixlib=rb-0.3.5\u0026ixid=eyJhcHBfaWQiOjEyMDd9\u0026s=8b6caac6353f390fbbabde8441dd1959",
            "full": "https://images.unsplash.com/photo-1516189050082-44d4deb5ceef?ixlib=rb-0.3.5\u0026q=85\u0026fm=jpg\u0026crop=entropy\u0026cs=srgb\u0026ixid=eyJhcHBfaWQiOjEyMDd9\u0026s=89ca725623d794116d3741907c93ceab",
            "regular": "https://images.unsplash.com/photo-1516189050082-44d4deb5ceef?ixlib=rb-0.3.5\u0026q=80\u0026fm=jpg\u0026crop=entropy\u0026cs=tinysrgb\u0026w=1080\u0026fit=max\u0026ixid=eyJhcHBfaWQiOjEyMDd9\u0026s=666eb6ac25c7fec68d5994545b933726",
            "small": "https://images.unsplash.com/photo-1516189050082-44d4deb5ceef?ixlib=rb-0.3.5\u0026q=80\u0026fm=jpg\u0026crop=entropy\u0026cs=tinysrgb\u0026w=400\u0026fit=max\u0026ixid=eyJhcHBfaWQiOjEyMDd9\u0026s=3dbc611c97d323ff8b4b043cff19317b",
            "thumb": "https://images.unsplash.com/photo-1516189050082-44d4deb5ceef?ixlib=rb-0.3.5\u0026q=80\u0026fm=jpg\u0026crop=entropy\u0026cs=tinysrgb\u0026w=200\u0026fit=max\u0026ixid=eyJhcHBfaWQiOjEyMDd9\u0026s=0c760185c35eadb31a7bba9b9794d424"
        },
        "links": {
            "self": "https://api.unsplash.com/photos/r7bVvV7MLdQ",
            "html": "https://unsplash.com/photos/r7bVvV7MLdQ",
            "download": "https://unsplash.com/photos/r7bVvV7MLdQ/download",
            "download_location": "https://api.unsplash.com/photos/r7bVvV7MLdQ/download"
        },
        "categories": [],
        "sponsored": false,
        "likes": 0,
        "liked_by_user": false,
        "current_user_collections": [],
        "slug": "cloud-smoke-steam",
        "user": {
            "id": "G69mdFHx0X0",
            "updated_at": "2018-05-03T14:00:07-04:00",
            "username": "maxkuk",
            "name": "Max Kukurudziak",
            "first_name": "Max",
            "last_name": "Kukurudziak",
            "twitter_username": null,
            "portfolio_url": "http://www.instagram.com/makckuk",
            "bio": "Product Designer at MacPaw, Lecturer at Projector",
            "location": "Kiev, Ukraine",
            "links": {
                "self": "https://api.unsplash.com/users/maxkuk",
                "html": "https://unsplash.com/@maxkuk",
                "photos": "https://api.unsplash.com/users/maxkuk/photos",
                "likes": "https://api.unsplash.com/users/maxkuk/likes",
                "portfolio": "https://api.unsplash.com/users/maxkuk/portfolio",
                "following": "https://api.unsplash.com/users/maxkuk/following",
                "followers": "https://api.unsplash.com/users/maxkuk/followers"
            },
            "profile_image": {
                "small": "https://images.unsplash.com/profile-1518780839522-ee199eceaf8c?ixlib=rb-0.3.5\u0026q=80\u0026fm=jpg\u0026crop=faces\u0026cs=tinysrgb\u0026fit=crop\u0026h=32\u0026w=32\u0026s=c37d2f2844b45f52c0f66cd580a200c8",
                "medium": "https://images.unsplash.com/profile-1518780839522-ee199eceaf8c?ixlib=rb-0.3.5\u0026q=80\u0026fm=jpg\u0026crop=faces\u0026cs=tinysrgb\u0026fit=crop\u0026h=64\u0026w=64\u0026s=93647049c20b6a323870fe0886eee329",
                "large": "https://images.unsplash.com/profile-1518780839522-ee199eceaf8c?ixlib=rb-0.3.5\u0026q=80\u0026fm=jpg\u0026crop=faces\u0026cs=tinysrgb\u0026fit=crop\u0026h=128\u0026w=128\u0026s=aff2d13afe9fe418b562b85c226b7e8e"
            },
            "instagram_username": "makckuk",
            "total_collections": 0,
            "total_likes": 6,
            "total_photos": 56
        },
        "tags": [{
            "title": "cloud"
        },
        {
            "title": "smoke"
        },
        {
            "title": "steam"
        },
        {
            "title": "mountain"
        },
        {
            "title": "volcano"
        },
        {
            "title": "blue"
        },
        {
            "title": "rock"
        },
        {
            "title": "glacier"
        },
        {
            "title": "field"
        },
        {
            "title": "geysir"
        },
        {
            "title": "iceland"
        }],
        "photo_tags": [{
            "title": "cloud"
        },
        {
            "title": "smoke"
        },
        {
            "title": "steam"
        },
        {
            "title": "mountain"
        },
        {
            "title": "volcano"
        },
        {
            "title": "blue"
        },
        {
            "title": "rock"
        },
        {
            "title": "glacier"
        },
        {
            "title": "field"
        },
        {
            "title": "geysir"
        },
        {
            "title": "iceland"
        }]
    },

I need to get results.profile_image.small I tried it on many ways but I never figured out how to access to profile_image fields.

Basically I want to do something like this:

dynamic array = JsonConvert.DeserializeObject(responz);

foreach (var itemx in array["results"])
{
    MessageBox.Show(itemx.profile_image.small.ToString()); 
}

I spent last few hours figuring it out, searching searching StackOverflow. The last option is do this with regex which would be very stupid thing to do.

profile_image lives inside the user object, so just change your code to itemx.user.profile_image.small.ToString(). However this would be way better if you deserialized into a concrete class instead of using dynamic. You likely would not have had this issue if you had intelisense backing you up. — maccettura
– maccettura, Commented May 15, 2018 at 16:53

maccettura · Accepted Answer · 2018-05-15 17:07:27Z

1

Based on your JSON, the actual path should be:

itemx.user.profile_image.small

So if you modify your code to include the missing "user" portion:

dynamic array = JsonConvert.DeserializeObject(responz);

foreach (var itemx in array["results"])
{
    MessageBox.Show(itemx.user.profile_image.small.ToString()); 
}

That should solve your problem.

However, this problem would likely not have presented itself if you were using a concrete class to deserialize into. You would have type safety and the assistance of Intelisense if you use a concrete class. You can easily convert your JSON sample into a concrete class using Json2CSharp or using the "Paste as Class" function of modern Visual Studio versions.

answered May 15, 2018 at 17:07

maccettura

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