Владимир Коротенко

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

public static string DbPath => DependencyService.Get<ISqLite>().GetDatabasePath("user.db");

#region License
// Разработано: Коротенко Владимиром Николаевичем (Vladimir N. Korotenko)
// email: koroten@ya.ru
// skype:vladimir-korotenko 
// https://vkorotenko.ru
// Создано:  09.04.2019 22:38
#endregion
using System;
using System.IO;
using SpecialForcesDirectory.Code;
using SpecialForcesDirectory.Droid;
using Xamarin.Forms;

[assembly: Dependency(typeof(SQLite_Android))]
namespace SpecialForcesDirectory.Droid
{
    public class SQLite_Android : ISqLite
    {
        public SQLite_Android() { }
        public string GetDatabasePath(string sqliteFilename)
        {
            string documentsPath = Environment.GetFolderPath(Environment.SpecialFolder.Personal);
            var path = Path.Combine(documentsPath, sqliteFilename);
            return path;
        }
    }
}

Можно и так 
public class Step
    {
        [JsonProperty("idStep")]
        public int IdStep { get; set; }
        public string stepName { get; set; }
        public int glassCount { get; set; }
        public bool isCutting { get; set; }
        public bool isShpt { get; set; }
    }

public partial class Form1 : Form
    {
        private LongTimeJob _ltj;
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            _ltj = new LongTimeJob();
            button1.Enabled = false;
            _ltj.Complete += _ltj_Complete;
            _ltj.Tick += _ltj_Tick;
            _ltj.Run();
        }

        private void _ltj_Tick(object sender, TickArgs args) =>
            progressBar1.Invoke((MethodInvoker)delegate { progressBar1.Value = args.Percent; });

        private void _ltj_Complete(object sender, EventArgs args)
        {
            button1.Invoke((MethodInvoker)delegate { button1.Enabled = true; });
            textBox1.Invoke((MethodInvoker)delegate { textBox1.Text = _ltj.Text; });
        }
    }

    public class LongTimeJob
    {
        public int Percent { get; private set; }
        public string Text { get; private set; } = "";
        public void Run()
        {
            Percent = 0;
            Task.Run(async () => await Download());
        }

        private async Task Download()
        {
            for (var i = 0; i < 9; i++)
            {
                Percent = i * 10;
                Text += $"Download: {i}\r\n";
                OnTick(Percent);
                await Task.Delay(400);
            }

            await Parse();
        }

        private async Task Parse()
        {
            Percent = 100;
            Text += "Parsing\r\n";
            OnTick(Percent);
            await Task.Delay(500);
            OnComplete();
        }
        public event TickDelegate Tick;
        protected virtual void OnTick(int percent)
        {
            Tick?.Invoke(this, new TickArgs(percent));
        }
        public event CompleteDelegate Complete;
        protected virtual void OnComplete()
        {
            Complete?.Invoke(this, new EventArgs());
        }
    }

    public delegate void TickDelegate(object sender, TickArgs args);

    public delegate void CompleteDelegate(object sender, EventArgs args);

    public class TickArgs : EventArgs
    {
        public TickArgs(int percent)
        {
            Percent = percent;
        }
        public int Percent { get; private set; }
    }

"DefaultConnection": "server=127.0.0.1;uid=errep;pwd=errep1234567;database=errep;CharSet=utf8;"

<form class="is-small select" id="FilterForm" method="post" asp-page-handler="FilterGenerated">
                <select asp-for="SelectedOptions" asp-items="@Model.Options" onchange="this.form.submit()"></select>
            </form>

<a asp-page="Edit" asp-route-id="@item.Id">Изменить</a>

// 8 раз в промежутке времени с 6 утра до 23 вечера и 2 раза с 23 вечера до 6 утра.
            var now = DateTime.Now;
            var startPeriod = (23 - 6) * 60;
            var startList = new List<int>();
            while (startList.Count < 8)
            {
                var val = RandomNumberGenerator.GetInt32(0, startPeriod);
                if (!startList.Contains(val))
                    startList.Add(val);
            }

            var runList = startList.OrderBy(x => x).Select(item => new DateTime(now.Year, now.Month, now.Day).AddMinutes(6 * 60 + item)).ToList();

            startList.Clear();
            var endPeriod = (1 + 6) * 60;
            while (startList.Count < 2)
            {
                var val = RandomNumberGenerator.GetInt32(0, endPeriod);
                if (!startList.Contains(val))
                    startList.Add(val);
            }

            runList.AddRange(startList.OrderBy(x => x).Select(item => new DateTime(now.Year, now.Month, now.Day).AddMinutes(23 * 60 + item)));
            ;