umbraco 8 datatype prevalues getting error unable to cast object of type systemcollectionsgenericdictionary

Daniel Rogers 69 posts 364 karma points

Apr 29, 2020 @ 09:40

umbraco 8 datatype prevalues getting error Unable to cast object of type 'System.Collections.Generic.Dictionary

Not sure where to start here but I have a datatype I are trying to create. I have the user interface workingfor the page loaout side and the prevalues but are know trying to join them to gether.

so the manifest

 editor: {
    view: "~/App_Plugins/IBD.GalleryItems/IBD.GalleryItems.View.html",
    valueType: "JSON"
  },
  prevalues : {
    fields: [
      {
        label: "Row Options",
        description: "The number of items per row and the slick slider control string",
        key: "items",
        view: "~/App_Plugins/IBD.GalleryItems/IBD.GalleryItems.Prevalues.html"
      }
    ]
  }

to access request the pre values

 if ($scope.ItemsPerRow == undefined || $scope.ItemsPerRow.length == 0) {
        $scope.ItemsPerRow = [];
        $http({
            method: 'GET',
            url: '/Umbraco/Api/IBDBackOffice/GalleryItemPrevalue',
            params: { dataTypeID: 1114 }
        }).then(function (data) {
            angular.forEach(data.data,
                function (value, key) {
                   .....process results.........
            $scope.load = true;
        }
        else {
            $scope.load = true;
        } ..........

and the api routine

[HttpGet] public HttpResponseMessage GalleryItemPrevalue(int dataTypeID) { IDataTypeService dataTypeService = Services.DataTypeService;

        var dataType = dataTypeService.GetDataType(dataTypeID);
        var cp = new List<GalleryButtonItem>();

        if (dataType != null)
        {
            ValueListConfiguration valueList = (ValueListConfiguration)dataType.Configuration;


            foreach (ValueListConfiguration.ValueListItem node in valueList.Items)
            {
                GalleryButtonItem item = new GalleryButtonItem();
                JObject json = JObject.Parse(node.Value);


                item.Id = node.Id;
                item.Row = json.Value<string>("Row").ToString();
                item.Slick = json.Value<string>("Slick").ToString();
                cp.Add(item);
            }
        }
        var resp = new HttpResponseMessage()
        {
            Content = new StringContent(cp.ToJson())
        };
        resp.Content.Headers.ContentType = new MediaTypeHeaderValue("application/json");
        return resp;
    }

so every thing is working but it bails out here

ValueListConfiguration valueList = (ValueListConfiguration)dataType.Configuration;

this is the error

Possibly unhandled rejection: {"data":{"Message":"An error has occurred.","ExceptionMessage":"Unable to cast object of type 'System.Collections.Generic.Dictionary2[System.String,System.Object]' to type 'Umbraco.Core.PropertyEditors.ValueListConfiguration'.","ExceptionType":"System.InvalidCastException","StackTrace":" at IBDBackOfficeApi.IBDBackOfficeController.GalleryItemPrevalue(Int32 dataTypeID) in D:\\Web Development\\Zeke Project\\ZekeCore\\Api\\IbdBackOfficeApi.cs:line 26\r\n at lambda_method(Closure , Object , Object[] )\r\n at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.<>c__DisplayClass6_2.<GetExecutor>b__2(Object instance, Object[] methodParameters)\r\n at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.Execute(Object instance, Object[] arguments)\r\n at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ExecuteAsync(HttpControllerContext controllerContext, IDictionary2 arguments, CancellationToken cancellationToken)\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at System.Web.Http.Controllers.ApiControllerActionInvoker.

Trying to learn something new so if anyone can get me heading in the right direction would be good.

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Daniel Rogers 69 posts 364 karma points

Apr 29, 2020 @ 14:29

Found a solution but there has to be a better way.

        if (dataType != null)
        {
            var propEditor = Current.PropertyEditors.Where(x => x.Alias == dataType.EditorAlias).FirstOrDefault();
            var valueList = propEditor.GetConfigurationEditor().ToValueEditor(dataType.Configuration);

            foreach (var node in valueList.Values)
            {
                JObject json = JObject.Parse(node.ToString());
                foreach (var items in json.Values())
                {
                    foreach (var bttn in items)
                    {
                        GalleryButtonItem item = new GalleryButtonItem();

                        item.Row = bttn.Value<string>("Rows").ToString();
                        item.Slick = bttn.Value<string>("Slick").ToString();
                        cp.Add(item);
                    }
                }
            }
        }
        var resp = new HttpResponseMessage()
        {
            Content = new StringContent(cp.ToJson())
        };

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umbraco 8 datatype prevalues getting error Unable to cast object of type 'System.Collections.Generic.Dictionary