BExIS.Web.Shell.Areas.DCM.Controllers.FormController.RemoveMetadataAttributeUsage C# (CSharp) Method

        public ActionResult RemoveMetadataAttributeUsage(object value, int id, int parentid, int number, int parentModelNumber, int parentStepId)
        {
            TaskManager = (CreateTaskmanager)Session["CreateDatasetTaskmanager"];
            List<StepModelHelper> list = (List<StepModelHelper>)TaskManager.Bus[CreateTaskmanager.METADATA_STEP_MODEL_HELPER];

            StepModelHelper stepModelHelperParent = list.Where(s => s.StepId.Equals(parentStepId)).FirstOrDefault();

            //find the right element in the list
            MetadataAttributeModel removeAttributeModel = stepModelHelperParent.Model.MetadataAttributeModels.Where(m => m.Source.Id.Equals(id) && m.Number.Equals(number)).First();
            //remove attribute
            stepModelHelperParent.Model.MetadataAttributeModels.Remove(removeAttributeModel);
            //update childrenList
            UpdateChildrens(stepModelHelperParent, id);

            AbstractMetadataStepModel model = stepModelHelperParent.Model;

            BaseUsage parentUsage = stepModelHelperParent.Usage;
            BaseUsage attrUsage = UsageHelper.GetChildren(parentUsage).Where(u => u.Id.Equals(id)).FirstOrDefault();

            //remove from xml
            RemoveAttributeToXml(stepModelHelperParent.Usage, stepModelHelperParent.Number, attrUsage, number, UsageHelper.GetNameOfType(attrUsage), stepModelHelperParent.XPath);

            if (model != null)
            {

                if (model is MetadataPackageModel)
                {
                    return PartialView("_metadataPackageUsageView", stepModelHelperParent);
                }

                if (model is MetadataCompoundAttributeModel)
                {
                    return PartialView("_metadataCompoundAttributeUsageView", stepModelHelperParent);
                }
            }

            return null;
        }