Crystal report viewer not show data at all

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C#

C#4.0

I write the following code in C#.net 4.0 web application.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using CrystalDecisions.CrystalReports.Engine;
using CrystalDecisions.Shared;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
public partial class SimpleCrystal1 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
ReportDocument rptDoc = new ReportDocument();
dsTestCrystal ds = new dsTestCrystal();
DataTable dt = new DataTable();
dt.TableName = "Users";
dt = getAllOrders().Tables[0];
ds.Tables[0].Merge(dt);
rptDoc.Load(Server.MapPath("SimpleCrystal.rpt"));
rptDoc.SetDataSource(ds);
CrystalReportViewer1.ReportSource = rptDoc;
}
public DataSet getAllOrders()
{
string sqlCon = ConfigurationManager.AppSettings["conStr1"].ToString();
SqlConnection Con = new SqlConnection(sqlCon);
SqlCommand cmd = new SqlCommand();
DataSet ds = null;
SqlDataAdapter adapter;
try
{
Con.Open();
cmd.CommandText = "getAllOrders";
cmd.CommandType = CommandType.StoredProcedure;

cmd.Connection = Con;
ds = new DataSet();
adapter = new SqlDataAdapter(cmd);
adapter.Fill(ds, "Users");
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
finally
{
cmd.Dispose();
if (Con.State != ConnectionState.Closed)
Con.Close();
}
return ds;
}
}