@typeparam TItem

<table onmousewheel="@OnWheel">
...
</table>

@code {
    [Parameter] public EventCallback<WheelEventArgs> OnWheel { get; set; }

    [Parameter] public IEnumerable<TItem> Items { get; set; }
}

@page "/mytest"

<MyComponent Items="ToData" OnWheel="OnWheel">
...
</MyComponent Items>

using Microsoft.AspNetCore.Components;
using Microsoft.AspNetCore.Components.Web;
using System.Collections.Generic;
using TestMysql.Data;
using TestMysql.Services;

namespace TestMysql.Pages
{
    public partial class MyTest
    {
        [Inject]
        ITestService Service { get; set; }

        List<Test> ToData = new List<Test>();
        int Row = 0;
        int Limit = 22;
        int RowsCount = -1;
        int RowsInWheel = 3;
        string Filter = "";

        void OnWheel(WheelEventArgs e)
        {
            int rows = (int)e.DeltaY / 100;
            if (rows > 0)
            {
                Row += RowsInWheel  * rows;
                if (Row >= RowsCount - Limit) Row = RowsCount - Limit;
            }
            else Row -= RowsInWheel  * -rows;
            if (Row < 0) Row = 0;
            LoadData();
        }

        protected override void OnInitialized()
        {
            LoadData();
        }

        void LoadData()
        {
            ToData = Service.Get(Limit, Row, Filter);
            RowsCount = Service.GetRowsCount(Filter);
            StateHasChanged();
        }
    }
}

@typeparam TItem

<table onmousewheel="@OnWheel">
...
</table>

@code {

    [Parameter] public int RowsCount { get; set; } = 0;

    [Parameter] public int RowsInPage { get; set; } = 22;

    [Parameter] public int RowsInWheel { get; set; } = 3;

    [Parameter] public string Filter { get; set; } = "";

    [Parameter] public EventCallback<WheelEventArgs> OnWheel { get; set; }

    [Parameter] public IEnumerable<TItem> Items { get; set; }

        int Row = 0;

        void OnWheelEvent(WheelEventArgs e)
        {
            int rows = (int)e.DeltaY / 100;
            if (rows > 0)
            {
                Row += RowsInWheel * rows;
                if (Row >= RowsCount - RowsInPage) Row = RowsCount - RowsInPage;
            }
            else Row -= RowsInWheel * -rows;
            if (Row < 0) Row = 0;
        }

}