con.Open();

SqlCommand cmd = con.CreateCommand();
cmd.CommandType = CommandType.Text;
cmd.CommandText = "Select * from SIZENN where INVOICENO ='" + textBoxINVOICENO.Text + "', ";

cmd.ExecuteNonQuery();

SqlDataAdapter adp = new SqlDataAdapter(cmd);
adp.Fill(ds, "SIZENN");

CRYRPTT myReport = new CRYRPTT();
myReport.SetDataSource(ds);

crystalReportViewer1.ReportSource = myReport;
crystalReportViewer1.Refresh();

con.Close();

I want to show data in a Crystal Report, but I don't understand what the exact problem is with my code.