public FormPicWorkHours()
{
InitializeComponent();
db = new ClassDB();
dataGridView1.ColumnCount = 4;
dataGridView1.Columns[0].HeaderCell.Value = "ID Смены";
dataGridView1.Columns[1].HeaderCell.Value = "Дата";
dataGridView1.Columns[2].HeaderCell.Value = "Фамилия сотрудника";
dataGridView1.Columns[3].HeaderCell.Value = "Должность";
db.SearchWorkHoursForPic(dataGridView1);
}