private void Materials_Load(object sender, EventArgs e)
        {
            try
            {
                //PictureBox2.ImageLocation = @"D:\Program Files\SolidWorks 2013\SolidWorks\data\graphics\Images\preview\light grey low gloss plastic.jpg";

                ButtonOK.Enabled      = false;
                BtnOkAndClose.Enabled = false;

                AddSelectAllCheckBox(DataGridConfig);

                CboColor.DisplayMember = "RAL";
                CboColor.ValueMember   = "HEX";
                CboColor.DataSource    = _sqlDll.RalTable();

                _sqlDll.PopulateTreeView("1", "Материалы", null, MatTree);

                CboType.ValueMember   = "Code";
                CboType.DisplayMember = "Name";

                CboType.DataSource = _matDll.CoatingTypeDt().DefaultView;

                CboClass.DataSource = _matDll.CoatingListClass();

                LoadDataGrid();
                txtBoxSearch.Text      = "Поиск...";
                txtBoxSearch.ForeColor = Color.Gray;
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }