You can use Rowfilters on your default dataview. Below is a simple example.
dataTableConfig = _wrapper.GetMedcoProductConfig();
DataView dvPDPD = dataTableConfig .Tables[0].DefaultView;
dvPDPD.RowFilter = "RX_PDPD_ID = '" + txtSuggest.Text.Trim().ToUpper()+"'";
gvConfig.DataSource = dvPDPD.ToTable();
gvConfig.DataBind();