Hello ,
suppose you have one datagridviewcombobox column named as cmbproduct. and if you want to bind the combobox value from dataset then
cmbproduct.DataSource = dsproduct.Tables[0].Columns[0].Table.DefaultView;
cmbproduct.ValueMember = "PId";
cmbproduct.DisplayMember = "Pname";
and put this code in window_load or other event .
thanks