Show results in datagrid wpf

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C#

I am using visual studio and microsoft access 2012.
I have a datagrid named MedicineTable.
I want to show the query result in the datagrid. I did this but nothing happened.

cmd.CommandText = "SELECT PRICELIST.* FROM PRICELIST WHERE ID=10";
cmd.CommandType = CommandType.Text;
OleDbDataAdapter da = new OleDbDataAdapter(cmd);
DataTable Medicines = new DataTable();
da.Fill(Medicines);
MedicineTable.DataContext = Medicines;