@Number

@code {
    [Parameter]
    public string Number { get; set; }

    protected override Task OnInitializedAsync()
    {
        var persianDic = new Dictionary<char, char>
        {
            {'0','۰'},
            {'1','۱'},
            {'2','۲'},
            {'3','۳'},
            {'4','۴'},
            {'5','۵'},
            {'6','۶'},
            {'7','۷'},
            {'8','۸'},
            {'9','۹'},

        };
        var number = Number.ToString();
        var ech = number.ToCharArray();
        for (int i = 0; i < ech.Length; i++)
        {
            persianDic.TryGetValue(ech[i], out char pch);
            if (pch == null)
                continue;
            ech[i] = pch;
        }
        Number = new string(ech);
        return base.OnInitializedAsync();
    }
}

... 
@foreach (var item in _items)
                {
                    <tr>
                        <td class="h6 text-color-1">@item.Title</td>
                        <td> <PersianNumber Number="@item.Price.ToString()"/> ریال</td>
                    </tr>
                }
...