Add and Delete rows in datagrid

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C#

I have a datagrid in wpf application. When i click the button there a query that results in 1 row.
I want to add that row to the datagrid. I tried this but giving empty

cmd.CommandText = "SELECT * FROM PRICELIST WHERE ID=14200";
OleDbDataAdapter da = new OleDbDataAdapter(cmd);
DataTable MedTable = new DataTable();
da.Fill(MedTable);
DataRow rw = MedTable.Rows[0];
// MessageBox.Show(rw[0].ToString());
MedicineTable.Items.Add(rw);

Although when i print rw[0] its giving the right result but in datagrid, its just adding empty row.