public override void CreateEditControls() { var imageSlideCollectionControl = Page.LoadControl("~/ImageMap/Web/ImageMapProperty/ImageMapEditModeControl.ascx"); _propertyImageMapEditModeView = (IPropertyImageMapEditModeView)imageSlideCollectionControl; _propertyImageMapEditModeView.InitialImageMap = JsonConvert.SerializeObject(ImageMap, new IsoDateTimeConverter()); Controls.Add(imageSlideCollectionControl); _propertyImageMapEditModeView.InitialImageMap = JsonConvert.SerializeObject(ImageMap, new IsoDateTimeConverter()); }