SUBD/View/UsersForm.cs

using Database;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace View
{
	public partial class UsersForm : Form
	{
		private Abstracts db;
		public UsersForm(Abstracts abstracts)
		{
			InitializeComponent();
			db = abstracts;
		}

		private void buttonReload_Click(object sender, EventArgs e)
		{
			LoadData();
		}

		private void buttonUpdate_Click(object sender, EventArgs e)
		{
			if (dataGridView1.SelectedRows.Count == 1)
			{
				int id = Convert.ToInt32(dataGridView1.SelectedRows[0].Cells["Id"].Value);
				var service = Program.ServiceProvider?.GetService(typeof(UserForm));
				if (service is UserForm form)
				{
					form.UserId = id;
					if (form.ShowDialog() == DialogResult.OK)
					{
						LoadData();
					}
				}
			}
		}

		private void buttonDelete_Click(object sender, EventArgs e)
		{
			if (dataGridView1.SelectedRows.Count == 1)
			{
				int id = Convert.ToInt32(dataGridView1.SelectedRows[0].Cells["Id"].Value);
				try
				{
					db.DeleteUser(id);
				}
				catch (Exception ex)
				{
					MessageBox.Show(ex.Message, "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
				}
				LoadData();
			}
		}

		private void buttonCreate_Click(object sender, EventArgs e)
		{
			var service = Program.ServiceProvider?.GetService(typeof(UserForm));
			if (service is UserForm form)
			{
				if (form.ShowDialog() == DialogResult.OK)
				{
					LoadData();
				}
			}
		}

		private void LoadData()
		{
			try
			{
				if (dataGridView1.ColumnCount == 0)
				{
					dataGridView1.Columns.Add("Id", "Id");
					dataGridView1.Columns.Add("Name", "Name");
					dataGridView1.Columns.Add("Email", "Email");
					dataGridView1.Columns.Add("Birthday", "Birthday");
				}

				var list = db.GetUsers();
				if (list != null)
				{
					dataGridView1.Rows.Clear();
					foreach (var user in list)
					{
						dataGridView1.Rows.Add(user.Id, user.name, user.email, user.birthday);
					}
				}
			}
			catch (Exception ex)
			{
				MessageBox.Show(ex.Message, "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
			}
		}

		private void UsersForm_Load(object sender, EventArgs e)
		{
			LoadData();
		}
	}
}