private void AddGrdComBox()//在datagrid列中添加下拉列表
{
DataGridTextBoxColumn dgtb = (DataGridTextBoxColumn)grd_please.TableStyles[0].GridColumnStyles[8]; //8是列的序号

ComboBox cmbFunctionArea = new ComboBox();

cmbFunctionArea.Items.AddRange(new object[]{"正本","副本","原稿"});

cmbFunctionArea.Cursor = Cursors.Arrow;

cmbFunctionArea.DropDownStyle= ComboBoxStyle.DropDownList;

cmbFunctionArea.Dock = DockStyle.Fill;

cmbFunctionArea.SelectionChangeCommitted += new EventHandler(cmbFunctionArea_SelectionChangeCommitted);

dgtb.TextBox.Controls.Add(cmbFunctionArea);


}