SqlHelper, Plain ADO.Net or Microsoft Data Access Block which one is better for used in ASP.Net?

Hello,

I want to use the SqlHelper Class but I installed Enterprise Library 5.0 on my computer and what do I need to use this class ?

I saw too it's possible to use ADO.NET instead of the SqlHelper. What is the difference and the easiest for this code :

 ReportViewer1.Visible = true;
        SqlConnection thisConnection = new SqlConnection(thisConnectionString);
        System.Data.DataSet thisDataSet = new System.Data.DataSet();       
        SearchValue[0] = new SqlParameter("@Nom", 
                         DropDownList1.SelectedValue);

        /* Put the stored procedure result into a dataset */
        thisDataSet = SqlHelper.ExecuteDataset(thisConnection, 
                      "ShowProductByCategory", SearchValue);

        /*or   thisDataSet = SqlHelper.ExecuteDataset(thisConnection, 
               "ShowProductByCategory", dropdownlist1.selectedvalue); 
               if you only have 1 input parameter  */

        /* Associate thisDataSet  (now loaded with the stored 
           procedure result) with the  ReportViewer datasource */
        ReportDataSource datasource = new 
          ReportDataSource("DataSetProducts_ShowProductByCategory", 
          thisDataSet.Tables[0]);

        ReportViewer1.LocalReport.DataSources.Clear();
        ReportViewer1.LocalReport.DataSources.Add(datasource);

Thank you !