DataTable tb = new DataTable();
tb = GetData(st);
bs.DataSource = tb;
dgvDirectories.Columns.Remove(row[columnname]);
DataGridViewComboBoxColumn comboColumn = new DataGridViewComboBoxColumn();
comboColumn.DataSource = tb;
comboColumn.FlatStyle = FlatStyle.Flat;
comboColumn.Name = row[columnname];
comboColumn.ValueMember = row[value_member];
comboColumn.DisplayMember = row[display_member];
comboColumn.DataPropertyName = row[columnname];
dgvDirectories.Columns.Insert(System.Convert.ToInt32(row[number]) -1, comboColumn);