how to set value in DataGridViewComboBoxColumn from a datatable?

DataGridViewComboBoxColumn dgvcb = (DataGridViewComboBoxColumn)grvPackList.Columns["Units"];
   开发者_运维问答             Globals.G_ProductUtility G_Utility = new Globals.G_ProductUtility();
                dgvcb.DisplayStyle = DataGridViewComboBoxDisplayStyle.DropDownButton;
                G_Utility.addUnittoComboDGV(dgvcb);
                DataSet _ds = iRawMaterialsRequest.Select();
                grvPackList.DataSource = _ds.Tables[0];

the problem is that the DataGridViewComboBoxColumn in the datagrid is not selected with the value in table how is it possilbe to set value of DataGridViewComboBoxColumn from datasoure

int i=0;
                foreach (DataRow dgvr in  _ds.Tables[0].Rows )
                {
                    grvPackList.Rows[i].Cells["Units"].Value = dgvr["Units"].ToString();
                    i++;
                }

this code is working but is there any solution with out using loops?

int i=0; 
 foreach (DataRow dgvr in  _ds.Tables[0].Rows )
                {
                    grvPackList.Rows[i].Cells["Units"].Value = dgvr["Units"].ToString();
                    i++;
                }

When i Tried this it worked fine

you can bind the DataGridViewComboBoxColumn directly to your datasouce like

DataGridViewComboBoxColumn dgvcb = (DataGridViewComboBoxColumn)grvPackList.Columns["Units"];
dgvcb.ValueMember = "YourUnitValue"; 
dgvcb.DisplayMember = "Units";
dgvcb.DataSource = _ds.Tables[0];