Thanks so much David. I've got it working now.

Obvious when it's pointed out but I just couldn't figure it out last night.

Hello I have a similar problem can you help me? I can not initialize items it tells me that the value is null and item.add logically I must put an object but I do not know which object thank you

var mycontentService =  Services.ContentService;
        var itemregulatory = mycontentService.CreateContent(name, parentId, "regulatory",0);
        itemregulatory.SetValue("countryname", countryname);
        itemregulatory.SetValue("referTo", referTo);
        itemregulatory.SetValue("authorityName",authorityName);
        itemregulatory.SetValue("webSiteLink", webSiteLink);
        itemregulatory.SetValue("localTesting",localTesting);
        itemregulatory.SetValue("testsRequired", testsRequired);
        itemregulatory.SetValue("countryOwner",countryOwner);
        itemregulatory.SetValue("systemAproval", systemAproval);
        //itemregulatory.SetValue("antennaDependant",antennaDependant);
        itemregulatory.SetValue("sampleNeeded", sampleNeeded);
        itemregulatory.SetValue("countryInfoMarkingRequirements",countryInfoMarkingRequirements);
        itemregulatory.SetValue("agent", agent);
        itemregulatory.SetValue("certificationCost",certificationCost);
        //itemregulatory.SetValue("technology", "");


        //var items = JsonConvert.DeserializeObject<List<Dictionary<string, object>>>(itemregulatory.GetValue<string>("technology"));
        var items = JsonConvert.DeserializeObject<List<Dictionary<string, object>>>(itemregulatory.GetValue<string>("technology"));

        items.Add(new Dictionary<string, object>() {
          {
            "technologyUse1",
            "3G"
          },
          {
            "bandNumber",
            "002"
          }
        });

        itemregulatory.SetValue("technology", JsonConvert.SerializeObject(items));
        mycontentService.SaveAndPublishWithStatus(itemregulatory);

This line is probably return a null value as you don't have anything in the property yet:

var items = JsonConvert.DeserializeObject<List<Dictionary<string, object>>>(itemregulatory.GetValue<string>("technology"));

You need to check if items is null and, if so, initialize it accordingly:

if (items == null) {
    items = new List<Dictionary<string, object>>();
}

Note: the serialized format of Nested Content property values has quite probably changed in v8. Here is what I have in database for a Nested Content property with only 1 TextBox:

[
  {"key":"04a6dba8-813c-4144-8aca-86a3f24ebf08","name":"Item 1","ncContentTypeAlias":"nested","text":"woot"},
  {"key":"d8e214d8-c5a5-4b45-9b51-4050dd47f5fa","name":"Item 2","ncContentTypeAlias":"nested","text":"zoot"}
]

So this will probably need to be amended for v8

My solution in Umbraco 8.1.4:

var liste = new List<Dictionary<string, string>>();

Guid guid1 = Guid.NewGuid();

liste.Add(new Dictionary<string, string>(){
    {"key","@guid1"},
    {"name","Some name"},
    {"ncContentTypeAlias","Your NestedContent Element-Type Alias"},
    {"Property in NestedContent","Some Text"},
});

node.SetValue("Your NestedContent Property Alias", JsonConvert.SerializeObject(liste));

I have the nested content variant working. Does anyone have a example of how to do this with a blocklist editor

I see this in the database {"layout":{"Umbraco.BlockList":[{"contentUdi":"umb://element/0aa543991746424fb5d709793a14b8e3"},{"contentUdi":"umb://element/34c4794b69404535bce54bb6e1570b79"}]},"contentData":[{"contentTypeKey":"7af0ad93-b236-4b5c-9664-3c408dee7f85","udi":"umb://element/0aa543991746424fb5d709793a14b8e3","description":"test","value":"test2"},{"contentTypeKey":"7af0ad93-b236-4b5c-9664-3c408dee7f85","udi":"umb://element/34c4794b69404535bce54bb6e1570b79","description":"test3","value":"test4"}],"settingsData":[]}

Ben/Stefan

There some WIP documentation here, regarding creating block list content programatically that might be helpful:

https://github.com/umbraco/UmbracoDocs/blob/e64ec0e5b28b4e5a37b7865691621e45dd82701f/Getting-Started/Backoffice/Property-Editors/Built-in-Property-Editors/Block-List-Editor/index.md#creating-blocklist-programmatically

regards

Marc

Hi all I have a similar problem can you please help me? I worked above code but it won't work currently i'm using umbraco 8.8. Can you please give me working sample code.

Thanks in advance

Hi Kiran,

Here a working example in umbraco 8.7. Nested content has 3 fields description, value1 and value2

Nested content is available is a doctype named slab

public class ContentDataThreeColumnItem : IContentDataItem { #region Properties

    [JsonProperty("contentTypeKey")]
    public Guid ContentTypeKey { get; set; }

    [JsonProperty("description")]
    public string Description { get; set; }

    [JsonProperty("udi")]
    public GuidUdi Udi { get; set; }

    [JsonProperty("value1")]
    public string Value1 { get; set; }

    [JsonProperty("value2")]
    public string Value2 { get; set; }

    #endregion
}

public class BlockListItem { #region Properties

    public string Description { get; set; }
    public string Value1 { get; set; }
    public string Value2 { get; set; }

    #endregion
}

private readonly IContentService _contentService;

public ExcelService(IContentService contentService, IContentTypeService contentTypeService, ISqlContext sqlContext, IMediaService mediaService, IMediaTypeService mediaTypeService) { _contentService = contentService; _contentTypeService = contentTypeService; _sqlContext = sqlContext; _mediaService = mediaService; _mediaTypeService = mediaTypeService; }

var slabNode = _contentService.GetPagedChildren(slabCollectionNode.Id, 0, 100, out totalRecords, filter).FirstOrDefault();

var slabNodeBlockListItemList = new List

slabNodeBlockListItemList.Add(new BlockListItem { Description = cpsExcelModel.Value1, Value1 = cpsExcelModel.Value2, Value2 = cpsExcelModel.Value3 });

var blockListItemContentType = ThreeColumnRow.GetModelContentType().Alias

foreach (var blockListItem in slabNodeBlockListItemList) { var contentUdi = new Content(null, slabNode, blockListItemContentType).GetUdi(); blockList.Layout.UmbracoBlockList.Add(new ContentUdiItem { ContentUdi = contentUdi });

                        blockList.ContentDataList.Add(new ContentDataThreeColumnItem
                        {
                            ContentTypeKey = blockListItemContentType.Key,
                            Udi = contentUdi,
                            Description = blockListItem.Description,
                            Value1 = blockListItem.Value1,
                            Value2 = blockListItem.Value2
                        });
                }

var serializedBlockList = JsonConvert.SerializeObject(blockList); slabNode.SetValue(Slab.GetModelPropertyType(a => a.ReferenceTable).Alias, serializedBlockList, currentVariantLanguage);

_contentService.SaveAndPublish(slabNode, currentVariantLanguage, 0, false);

Hope this gives you a direction

Useful. Informative. Thanks to all of you

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