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   源码介绍

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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 BusinessDataSample.CustomersDataSetTableAdapters;
using System.Data;
using System.Data.OleDb;

namespace BusinessDataSample
{
    /// <summary>
    /// Interaction logic for Window1.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        private CustomersDataSet.CustomersDataTable customers;

        private CollectionView dataView;
        internal CollectionView DataView
        {
            get
            {
                if (dataView == null)
                {
                    dataView = (CollectionView)
                        CollectionViewSource.GetDefaultView(
                        this.DataContext);
                }
                return dataView;
            }
        }

        public MainWindow()
        {
            InitializeComponent();

            CustomersTableAdapter customersTableAdapter =
                new CustomersTableAdapter();
            customers = customersTableAdapter.GetData();
            this.DataContext = customers;
        }

        private void nextButton_Click(object sender, RoutedEventArgs e)
        {
            DataView.MoveCurrentToNext();
        }

        private void previousButton_Click(object sender, RoutedEventArgs e)
        {
            DataView.MoveCurrentToPrevious();
        }

        private void OnRowUpdated(object sender, OleDbRowUpdatedEventArgs e)
        {
            if (e.StatementType == StatementType.Insert)
            {
                OleDbCommand cmdNewID = new OleDbCommand(
                    "SELECT @@IDENTITY", e.Command.Connection);
                e.Row["ID"] = (int)cmdNewID.ExecuteScalar();
            }
        }

        private void saveButton_Click(object sender, RoutedEventArgs e)
        {
            CustomersTableAdapter customersTableAdapter =
                new CustomersTableAdapter();
            customersTableAdapter.Adapter.RowUpdated  =
                new OleDbRowUpdatedEventHandler(OnRowUpdated);
            int rows = customersTableAdapter.Update(customers);
            System.Windows.MessageBox.Show(
                "Changes saved back to the database, "  
                rows   " row(s) updated.");
        }

        private void addNewButton_Click(object sender, RoutedEventArgs e)
        {
            customers.AddCustomersRow("New Company", "", "", "",
                "", "", "", "", "", "");
            customerListBox.SelectedIndex = customers.Rows.Count - 1;
        }

        private void deleteButton_Click(object sender, RoutedEventArgs e)
        {
            CustomersDataSet.CustomersRow selectedRow =
                (CustomersDataSet.CustomersRow)
                ((DataRowView)customerListBox.SelectedItem).Row;
            string company = selectedRow.CompanyName;
            string message = "Are you sure you want to delete the "  
                "customer \""   company   "\"?";
            if (MessageBox.Show(message, "Delete Customer",
                MessageBoxButton.YesNoCancel,
                MessageBoxImage.Exclamation) == MessageBoxResult.Yes)
            {
                selectedRow.Delete();
            }
        }
    }
}