Hello guys i am stuck with this realy hard.

I will try to explain my problem the best i know (with my poor english).

I have nodes (categories) and i have members with MNTP property which is linked to this nodes (categories).

I mananged to display all categories and found which category is picked by member in my view but i dont know how to display checkbox as checked if its picked by member and than after submiting the form pass this data to controller so i can save this value to MNTP.

This is what i have don for now:

View:

    @using (Html.BeginUmbracoForm<CategoriesController>("SaveCategories"))
{

        // GET ALL CATEGORIES FROM CATEGORY LIST
        var categories = Umbraco.Content(Guid.Parse("7ad9518b-2069-4ac5-9035-e052decf6e05")).Children().Where(x => x.IsVisible() && x.Name != null).ToArray();

        // GET MEMBER BY ID
        var member = Services.MemberService.GetById(1148);

        // CREATE LIST OF MEMBER CATEGORIES
        List<IPublishedContent> memberCategories = new List<IPublishedContent>();

        // GET MEMBER PROPERTY WITH LIST OF UDI-s
        var memberCategoriesUdi = member.GetValue<string>("categoryPicker");

        // CHECK IF MEMBERPROPERTY IS EMPTY
        if (memberCategoriesUdi != null)
        {
            foreach (var udi in memberCategoriesUdi.Split(','))
            {
                //OCNVERT UDI TU IPublishedContent
                var cer = Umbraco.Content(Udi.Parse(udi)).DescendantsOrSelf()
                                                 .Where(x => x.IsVisible()).ToArray(); ;

                foreach (var category in cer)
                {
                    //ADD CATEGORIES TO LIST
                    memberCategories.Add(category);
                }
            }
        }


    @* Ensure that the Current Page has children *@
    if (categories.Length > 0)
    {
        @* Get the first page in the children, where the property umbracoNaviHide is not True *@
        var naviLevel = categories[0].Level;

        @* Add in level for a CSS hook *@
        <ul class="list-group list-group-flush level-@(naviLevel)">
            @* Loop through the selection *@
            @foreach (var item in categories)
            {
                //IF MEMBER HAS ALREDY PICKED THAT CATEGORY SHOW THIS:
                <li>
                    @if (memberCategories.Contains(item))
                    {
                        @Html.CheckBoxFor(m => m.IsSelected, new { @checked = true }) @item.Name
                    }
                    else
                    {
                        @Html.CheckBoxFor(m => m.IsSelected, new { @checked = false }) @item.Name
                    }

                    @* if this child page has any children, where the property umbracoNaviHide is not True *@
                    @{
                        var children = item.Children.Where(x => x.IsVisible() && x.Name != null).ToArray();
                        if (children.Length > 0)
                        {
                            @* Call our helper to display the children *@
                            @ChildPages(children)
                        }
                    }
                </li>
            }
        </ul>
    }

    <button type="submit" class="btn btn-success btn-block"><i class="px-2 fa fa-sign-in fa-lg"></i>save</button>
}

Model:

  public class MemberCategories
{
    public int CategoryId { get; set; }
    public bool IsSelected { get; set; }
}
public class categories
{
    public List<MemberCategories> SelectedCategories { get; set; }
}

Controller:

 [HttpPost]
    public ActionResult SaveCategories(categories model)
    {
        if (ModelState.IsValid)
        {

        }
            return CurrentUmbracoPage();
    }