всё работает

LabWork/LabWork/FormContact.cs

@@ -29,8 +29,7 @@ namespace LabWork
 				{
 					var view = _logic.ReadElement(new ContactSearchModel
 					{
-						Id =
+						Id = _id.Value
-				   _id.Value
 					});
 					if (view != null)
 					{

LabWork/LabWork/FormContacts.Designer.cs

@@ -28,22 +28,23 @@
 		/// </summary>
 		private void InitializeComponent()
 		{
-			dataGridView1 = new DataGridView();
+			dataGridView = new DataGridView();
 			buttonAdd = new Button();
 			buttonUpd = new Button();
 			buttonRef = new Button();
 			buttonDel = new Button();
-			((System.ComponentModel.ISupportInitialize)dataGridView1).BeginInit();
+			((System.ComponentModel.ISupportInitialize)dataGridView).BeginInit();
 			SuspendLayout();
 			// 
-			// dataGridView1
+			// dataGridView
 			// 
-			dataGridView1.ColumnHeadersHeightSizeMode = DataGridViewColumnHeadersHeightSizeMode.AutoSize;
+			dataGridView.BackgroundColor = Color.LavenderBlush;
-			dataGridView1.Location = new Point(12, 12);
+			dataGridView.ColumnHeadersHeightSizeMode = DataGridViewColumnHeadersHeightSizeMode.AutoSize;
-			dataGridView1.Name = "dataGridView1";
+			dataGridView.Location = new Point(12, 12);
-			dataGridView1.RowHeadersWidth = 62;
+			dataGridView.Name = "dataGridView";
-			dataGridView1.Size = new Size(717, 426);
+			dataGridView.RowHeadersWidth = 62;
-			dataGridView1.TabIndex = 0;
+			dataGridView.Size = new Size(717, 426);
+			dataGridView.TabIndex = 0;
 			// 
 			// buttonAdd
 			// 
@@ -63,6 +64,7 @@
 			buttonUpd.TabIndex = 2;
 			buttonUpd.Text = "Изменить";
 			buttonUpd.UseVisualStyleBackColor = true;
+			buttonUpd.Click += buttonUpd_Click;
 			// 
 			// buttonRef
 			// 
@@ -72,6 +74,7 @@
 			buttonRef.TabIndex = 3;
 			buttonRef.Text = "Обновить";
 			buttonRef.UseVisualStyleBackColor = true;
+			buttonRef.Click += buttonRef_Click;
 			// 
 			// buttonDel
 			// 
@@ -81,6 +84,7 @@
 			buttonDel.TabIndex = 4;
 			buttonDel.Text = "Удалить";
 			buttonDel.UseVisualStyleBackColor = true;
+			buttonDel.Click += buttonDel_Click;
 			// 
 			// FormContacts
 			// 
@@ -91,16 +95,17 @@
 			Controls.Add(buttonRef);
 			Controls.Add(buttonUpd);
 			Controls.Add(buttonAdd);
-			Controls.Add(dataGridView1);
+			Controls.Add(dataGridView);
 			Name = "FormContacts";
 			Text = "Менеджер контактов";
-			((System.ComponentModel.ISupportInitialize)dataGridView1).EndInit();
+			Load += FormContacts_Load;
+			((System.ComponentModel.ISupportInitialize)dataGridView).EndInit();
 			ResumeLayout(false);
 		}
 
 		#endregion
 
-		private DataGridView dataGridView1;
+		private DataGridView dataGridView;
 		private Button buttonAdd;
 		private Button buttonUpd;
 		private Button buttonRef;

LabWork/LabWork/FormContacts.cs

@@ -7,19 +7,105 @@ using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 using System.Windows.Forms;
+using LabWork.Interfaces;
 
 namespace LabWork
 {
 	public partial class FormContacts : Form
 	{
-		public FormContacts()
+		private readonly IContactLogic _logic;
+		public FormContacts(IContactLogic logic)
 		{
 			InitializeComponent();
+			_logic = logic;
+		}
+		private void FormContacts_Load(object sender, EventArgs e)
+		{
+			LoadData();
+		}
+		private void LoadData()
+		{
+			try
+			{
+				var list = _logic.ReadList(null);
+				if (list != null)
+				{
+					dataGridView.DataSource = list;
+					dataGridView.Columns["Id"].Visible = false;
+					dataGridView.Columns["ContactName"].AutoSizeMode =
+				   DataGridViewAutoSizeColumnMode.Fill;
+				}
+			}
+			catch (Exception ex)
+			{
+				MessageBox.Show(ex.Message, "Ошибка", MessageBoxButtons.OK,
+			   MessageBoxIcon.Error);
+			}
 		}
 
 		private void buttonAdd_Click(object sender, EventArgs e)
 		{
+			var service = Program.ServiceProvider?.GetService(typeof(FormContact));
+			if (service is FormContact form)
+			{
+				if (form.ShowDialog() == DialogResult.OK)
+				{
+					LoadData();
+				}
+			}
+		}
+
+		private void buttonUpd_Click(object sender, EventArgs e)
+		{
+			if (dataGridView.SelectedRows.Count == 1)
+			{
+				var service =
+			   Program.ServiceProvider?.GetService(typeof(FormContact));
+				if (service is FormContact form)
+				{
+					form.Id =
+				   Convert.ToInt32(dataGridView.SelectedRows[0].Cells["Id"].Value);
+					if (form.ShowDialog() == DialogResult.OK)
+					{
+						LoadData();
+					}
+				}
+			}
+		}
+
+		private void buttonRef_Click(object sender, EventArgs e)
+		{
+			LoadData();
+		}
+
+		private void buttonDel_Click(object sender, EventArgs e)
+		{
+			if (dataGridView.SelectedRows.Count == 1)
+			{
+				if (MessageBox.Show("Удалить запись?", "Вопрос",
+				MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
+				{
+					int id =
+					Convert.ToInt32(dataGridView.SelectedRows[0].Cells["Id"].Value);
+					try
+					{
+						if (!_logic.Delete(new ContactBindingModel
+						{
+							Id = id
+						}))
+						{
+							throw new Exception("Ошибка при удалении. Дополнительная информация в логах.");
+						}
+						LoadData();
+					}
+					catch (Exception ex)
+					{
+						MessageBox.Show(ex.Message, "Ошибка",
+						MessageBoxButtons.OK, MessageBoxIcon.Error);
+					}
+				}
+			}
+		}
 
 	}
-	}
 }