Hi

i have crate an Partial view with name "_Menu" it's view items as menu and sub menu in my website

_Menu Partial view Code:

@model IEnumerable<MainCats>
@using GoShope.Models.GoShopeDB;

@{
    IList<MainCats> mainList = Model.Where(id => id.IsCompany == true).ToList();
}

<div class="panel-group category-products" id="accordian">
    <div class="panel panel-default">
        @foreach (var item in mainList)
        {
            @* Check If Has Sub Categories Or Not *@
            IList<MainCats> hasChieldItem = Model.Where(id => id.mainCatId == item.SubCats.Select(mainCatId => mainCatId.mainCatId).FirstOrDefault()).ToList();

            <div class="panel-heading">
                <h4 class="panel-title">
                    @if (hasChieldItem.Count() > 0)
                    {
                        <a data-toggle="collapse" data-parent="#accordian" href="@item.Tabs.mainTabName">
                            <span class="badge pull-right"><i class="fa fa-plus"></i></span>
                            @item.mainCatName
                        </a>
                    }
                    else
                    {
                        <a data-toggle="collapse" data-parent="#accordian" href="@Url.Action("View", "MainCats", new { id = item.mainCatId })">
                            @item.mainCatName
                        </a>
                    }
                </h4>
            </div>

            if (hasChieldItem.Count() > 0)
            {
                @* Get SubCats By mainCatId *@
                var db = new GoShopDBContext();
                IList<SubCats> subCats = db.SubCats.Where(mainid => mainid.mainCatId == item.mainCatId && mainid.IsCompany == true).ToList();

                <div id="@item.Tabs.childTabName" class="panel-collapse collapse">
                    <div class="panel-body">
                        @foreach (var Citem in subCats)
                        {
                            <ul>
                                <li><a href="@Url.Action("View", "SubCats", new { id = Citem.subCatId })">@Citem.subCatName</a></li>
                            </ul>
                        }
                    </div>
                </div>
            }
        }
    </div>
</div>

it works fine in the First view i use it with the same Model of the Partial view "MainCats"

Home Index View Code:

@model IEnumerable<MainCats>
@using GoShope.Models.GoShopeDB;

@{
    ViewBag.Title = "View";
    IList<MainCats> ComapnyList = Model.Where(isCompany => isCompany.IsCompany == true).ToList();
    IList<MainCats> PersonList = Model.Where(isCompany => isCompany.IsCompany == false).ToList();
}

@section companyAds{
    <h2 class="title text-center">company ads</h2>
    @foreach (var comapnyItems in ComapnyList)
    {
        <div class="col-sm-4">
            <div class="product-image-wrapper">
                <div class="single-products" style="padding-top:0">
                    <div class="productinfo text-center">
                        <img src="@Url.Content(comapnyItems.MainCatsImg.Select(id => id.imgPath).FirstOrDefault())" alt="" />
                    </div>
                    <div class="product-overlay">
                        <div class="overlay-content">
                            <i class="@comapnyItems.mainCatIcon"></i>
                            <h2>@comapnyItems.mainCatName</h2>
                        </div>
                    </div>
                </div>
                <div class="choose">
                    <ul class="nav nav-pills nav-justified">
                        <li>
                            <a href="@Url.Action("Books", new { id = comapnyItems.mainCatId })">
                                <img src="~/images/home/book.png" alt="" class="ico2">
                            </a>

                            <a href="@Url.Action("Videos", new { id = comapnyItems.mainCatId })">
                                <img class="ico" src="~/images/home/video.png" alt="">
                            </a>
                        </li>
                        <li>
                            <a href="@Url.Action("More", new { id = comapnyItems.mainCatId })">
                                <i class="fa fa-plus-square"></i>
                                more
                            </a>
                        </li>
                    </ul>
                </div>
            </div>
        </div>
    }
}

@section personAds{
    <h2 class="title text-center">person ads</h2>

    <div class="col-sm-12">
        <ul class="nav nav-tabs">
            @foreach (var item in PersonList)
            {
                @* Only If TabName == propertytab *@
                if (item.Tabs.mainTabName == "#propertytab")
                {
                    <li class="active">
                        <a href="@item.Tabs.mainTabName" data-toggle="tab">@item.mainCatName</a>
                    </li>
                }
                @* Only If TabName != propertytab *@
                else
                {
                    <li>
                        <a href="@item.Tabs.mainTabName" data-toggle="tab">@item.mainCatName</a>
                    </li>
                }
            }
        </ul>
    </div>

    <div class="tab-content">
        @foreach (var item in PersonList)
        {
            if (item.Tabs.childTabName == "propertytab")
            {
                @* Get propertytab Items In IList *@
                IList<MainCats> propertytabList = Model.Where(id => id.Tabs.childTabName == "propertytab").ToList();

                @* Loop Throw  propertytab Iist *@
                foreach (var propertytabListitem in propertytabList)
                {
                    <div class="tab-pane fade active in" id="@propertytabListitem.Tabs.childTabName">
                        <div class="col-sm-3">
                            <div class="product-image-wrapper">
                                <div class="single-products">
                                    <div class="productinfoslide text-center">
                                        <img src="~/images/home/akar.png" alt="" />
                                        <h4>@propertytabListitem.mainCatName</h4>
                                        <a href="#" class="btn btn-default plus-info">
                                            <i class="fa fa-plus-square"></i>
                                            more
                                        </a>
                                    </div>
                                </div>
                            </div>
                        </div>
                    </div>
                }
            }
            else
            {
                <div class="tab-pane fade" id="@item.Tabs.childTabName">
                    <div class="col-sm-3">
                        <div class="product-image-wrapper">
                            <div class="single-products">
                                <div class="productinfoslide text-center">
                                    <img src="~/images/home/akar.png" alt="" />
                                    <h4>cars</h4>
                                    <a href="#" class="btn btn-default plus-info">
                                        <i class="fa fa-plus-square"></i>
                                        more
                                    </a>
                                </div>
                            </div>
                        </div>
                    </div>
                </div>
            }
        }
    </div>
}

MainCats Controller Code:

  public ActionResult Index()
        {
            var mainCats = db.MainCats.Include(m => m.Tabs);
            return View(mainCats);
        }

now i try to use the same Partial view in other view , but this view work with other Model "SubCats" i try but it don't work and i got err:

The model item passed into the dictionary is of type 'System.Data.Entity.Infrastructure.DbQuery`1[GoShope.Models.GoShopeDB.SubCats]', but this dictionary requires a model item of type 'System.Collections.Generic.IEnumerable`1[GoShope.Models.GoShopeDB.MainCats]'.

Subcats Index View Code:

@model IEnumerable<SubCats>
@using GoShope.Models.GoShopeDB;

@{
    ViewBag.Title = "View";
}

@section CompanySubCats{

        <div class="col-sm-4">
            <div class="product-image-wrapper">
                <div class="single-products">
                    <div class="productinfo text-center">
                        <img src="~/images/home/product1.jpg" alt="" />
                        <h2>homes</h2>
                    </div>
                    <div class="product-overlay">
                        <div class="overlay-content">
                            <i class="fa fa-home"></i>
                            <h2>homes</h2>
                        </div>
                    </div>
                </div>
                <div class="choose">
                    <ul class="nav nav-pills nav-justified">
                        <li>
                            <a href="#"><img src="~/images/home/book.png" alt="" class="ico2"></a><a href="#">
                                <img class="ico" src="~/images/home/video.png" alt="">
                            </a>
                        </li>
                        <li><a href="#"><i class="fa fa-plus-square"></i> more </a></li>
                    </ul>
                </div>
            </div>
        </div>
}

SubCats Controller Code:

 public ActionResult Index()
        {
            var mainCats = db.SubCats.Include(m => m.MainCats);
            return View(mainCats);
        }

i try:

@Html.Partial("_Menu", new GoShope.Models.GoShopeDB.MainCats())

but i got err:

The model item passed into the dictionary is of type 'GoShope.Models.GoShopeDB.MainCats', but this dictionary requires a model item of type 'System.Collections.Generic.IEnumerable`1[GoShope.Models.GoShopeDB.MainCats]'.

so please how can i use Partial view with his Model "MainCats" and use the other view with his Model "SubCats" ?

Can't you use an interface (or a superclass) on both category classes? In either case, you can use one IEnumerable<ICategory> for both. As far as I can tell, both classes are using the same properties so generalizing your nested list can solve your issue.