Crystal report binding datatable or database programmatically

void BindCrystal()
        {
            string query = "select * from executive.employesallary";
            DataTable dt;
            dt = sampurnit.DataTable(query);

            SAMARPANN.Admin.CrystalReport1 crypt = new CrystalReport1();
            crypt.SetDataSource(dt);


            ReportDocument cryRpt = new ReportDocument();
            cryRpt.Load(@"D:\Samarpann_mannu\SAMARPANN\SAMARPANN\Admin\CrystalReport1.rpt");
            crystalReportViewer1.ReportSource = crypt;
            crystalReportViewer1.Refresh();

        } 

public static DataTable DataTable(string query)
       {
               if (cn.State != ConnectionState.Open)
               {
                   cn.Open();
               }
               SqlDataAdapter da = new System.Data.SqlClient.SqlDataAdapter(query,cn);
               DataTable dt = new DataTable();
               da.Fill(dt);
               return dt;

       }