Database not load to listview in WPF! Help me please

Hello everyone!

I'm a newbie WPF. Im building  a project use 3-tier to connect Database SQL, Insert, update data. But in the first, fill database and show it to Listview is not work!

This is my code:

code XAMP:

 

[CODE]

        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

        Title="MainWindow" Height="524" Width="640" Loaded="Window_Loaded" DataContext="{Binding}">

 

   

       

           

               

                   

               

           

           

               

                   

                   

               

           

       

   

 

[/CODE]

 I used 3-tier  (Presentation,Business,DataAccess)

This is class Connect.cs in DataAccess

[CODE]

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Data;

using System.Data.SqlClient;

using System.Windows.Forms;

namespace vanngoi_test.DataAccess

{

    class Connect

    {

        public SqlConnection conn;

        public SqlDataAdapter dataAd;

        //public DataTable dataTable;

        public DataSet ds;

        public void ConnectData()

        {

            String strConn = @"Data Source=GIANG-PC\SQLEXPRESS;Initial Catalog=vanngoi_test;Integrated Security=True";

            try

            {

                conn = new SqlConnection(strConn);

                conn.Open();

                conn.Close();

            }

            catch (Exception ex)

            {

                MessageBox.Show("Error" + ex.Message);

            }

        }

            // M?c dích là l?y d? li?u t? câu truy v?n truy?n vào r?i load lên listview

// get data from query and load to listview

            public DataSet GetDataSet(string sql)

            {

                dataAd = new SqlDataAdapter(sql, conn);

                ds = new DataSet();

                dataAd.Fill(ds);

                return ds;

            }

}

[/CODE]

 

this code class customersBUS.cs in Business:

[CODE]

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using System.Data;

using System.Data.SqlClient;

using vanngoi_test.DataAccess;

 

namespace vanngoi_test.Business

{

    class khachhangBUS

    {

        Connect connectData = new Connect();

        public DataSet GetInfoCustomers()

        {

            string sql = "SELECT name, accbalance FROM inforcustomers";         

            return connectData.GetDataSet(sql);

        }

    }

}

 

[/CODE]

 It connected with SQL server, but show to listview is not work. Follow XAML code in MainWindow.xaml.cs

[CODE]

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Data;

using System.Windows.Documents;

using System.Windows.Input;

using System.Windows.Media;

using System.Windows.Media.Imaging;

using System.Windows.Navigation;

using System.Windows.Shapes;

using System.Data.SqlClient;

using System.Data;

using vanngoi_test.Business;

using vanngoi_test.DataAccess;

 

namespace vanngoi_test

{

    ///

    /// Interaction logic for MainWindow.xaml

    ///

    public partial class MainWindow : Window

    {

        public MainWindow()

        {

            InitializeComponent();

        }

 

        private void Window_Loaded(object sender, RoutedEventArgs e)

        {

            //Connect cn = new Connect();           

            ListViewCustomerDetails.ItemsSource = cn.ds.Tables[0].DefaultView;       

        }

}

}

[/CODE]

please give me solution!

Thanks all!