@code {
                [Parameter]
    public bool Gender { get; set; }
    List<ViewGoodsStocksMvc> objGoods;
    protected override async Task OnInitializedAsync()
    {
        objGoods = await Task.Run(() => objGoodStockService.GetGoods(Gender));
    }
}

@page "/goodstock"
@using jeansBlazorAsh.Data
@using jeansBlazorAsh.Models
@inject GoodStockService objGoodStockService

<NavLink class="nav-link" href="">
    <span class="oi oi-plus" aria-hidden="true"></span>
</NavLink>
<h1>Информация о товарах</h1>
<button @onclick="OnInitializedAsync">Кнопка</button>

@if (objGoods == null)
{
    <p><em>Loading....</em></p>
}
else
{
    <div class=" col card-columns">
        @foreach (ViewGoodsStocksMvc vgs in objGoods)
        {
            <div class="card bg-light">
                <div class="card-body text-center">
                    <p class="card-text">
                        @vgs.Type
                        <span>@vgs.ManufName</span>
                        <span>@vgs.ModelName</span>
                        <span>@vgs.Widht</span>
                        <span>@vgs.LenghtId</span>
                    </p>
                    <img class="card-img-top img-fluid" src=@vgs.NomenclImagePath>
                    <div class="card-body">
                        <h4 class="card-title">@vgs.CurrentPrice</h4>
                        @if (vgs.FabricDensity != null)
                        {
                            <p class="card-text">
                                плотность &ensp;<span class="font-weight-bold">@vgs.FabricDensity</span>
                                <span>&ensp;oz</span>
                            </p>
                        }

                        <p class="card-text">@vgs.Description</p>
                        <a href="#" class="btn btn-primary">В корзину</a>
                    </div>
                </div>
            </div>
        }

    </div>
}

@code {

    public bool gender;
    [Parameter]
    public bool Gender
    {
        get
        {
            return gender;
        }
        set
        {
            gender = value;
            OnInitializedAsync();

        }
    }
    List<ViewGoodsStocksMvc> objGoods;

    protected override async Task OnInitializedAsync()
    {
        await InitAsync();
    }

    private async Task InitAsync()
    {
        objGoods = await Task.Run(() => objGoodStockService.GetGoods(Gender));
    }
}

<button @onclick="OnInitializedAsync">Кнопка</button>

public List<ViewGoodsStocksMvc> GetGoods(bool gender)
        {
            var goodList = (from good in _db.ViewGoodsStocksMvc.AsNoTracking()
                            where good.GenderM == gender
                            select good).ToList();
            return goodList;

        }

 public bool gender;
    [Parameter]
    public bool Gender
    {
        get
        {
            return gender;
        }
        set
        {
            gender = value;
            //OnInitializedAsync();
            objGoodStockService.GetGoods(gender);
            InvokeAsync(StateHasChanged);
        }
    }