Client-Side Reporting with Visual Studio in C#

Yesterday i was try produce report by Crystal Report. Now i am using Client Side Report for my ASP.NET project.
The first drag and drop Microsoft Report Viewer to your web form. Give the id is RptViewer.
Create New DataSet, define the coloumn do you need. For example TblXXX(cola,colb).

dont forget for include namespace for (System.Data.SqlClient and Microsoft.Reporting.WebForms).
//namespace
using System.Data.SqlClient;
using Microsoft.Reporting.WebForms;



String VarSQL;
SqlDataAdapter VarRst;
DataSet ds = new DataSet();

//Define object for connection to DB you can create by your self.
ClassDB.ClassToDB db = new ClassDB.ClassToDB();

VarSQL = "SELECT cola,colb FROM Tblzzz";

//result from method ExecuteDataAdapter is Data Adapter
VarRst = db.ExecuteDataAdapter(VarSQL);
VarRst.Fill(ds, "report");

ReportDataSource dataSource = new ReportDataSource("DataSet1_TblXXXX", ds.Tables[0]);
RptViewer.Reset();
RptViewer.LocalReport.ReportPath = Server.MapPath("rpt/rpt_fuel.rdlc");
RptViewer.LocalReport.DataSources.Add(dataSource);