/Visual Studio 2008/CSWPFPaging/MainWindow.xaml.cs

/************************************* Module Header **************************************\

* Module Name:  MainWindow.xaml.cs

* Project:      CSWPFPaging

* Copyright (c) Microsoft Corporation.

* 

* The sample demonstrates how to page data in WPF.

* 

* 

* This source is subject to the Microsoft Public License.

* See http://www.microsoft.com/opensource/licenses.mspx#Ms-PL.

* All other rights reserved.

* 

* History:

* * 12/02/2009 3:00 PM Zhi-Xin Ye Created

*/



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.Collections.ObjectModel;



namespace CSWPFPaging

{

    /// <summary>

    /// Interaction logic for MainWindow.xaml

    /// </summary>

    public partial class MainWindow : Window

    {

        public MainWindow()

        {

            InitializeComponent();

        }



        CollectionViewSource view = new CollectionViewSource();

        ObservableCollection<Customer> customers = new ObservableCollection<Customer>();

        int currentPageIndex = 0;

        int itemPerPage = 20;

        int totalPage = 0;



        private void ShowCurrentPageIndex()

        {

            this.tbCurrentPage.Text = (currentPageIndex + 1).ToString();

        }

        private void Window_Loaded(object sender, RoutedEventArgs e)

        {

            int itemcount = 107;

            for (int j = 0; j < itemcount; j++)

            {

                customers.Add(new Customer()

                {

                    ID = j,

                    Name = "item" + j.ToString(),

                    Age = 10 + j,

                    Country = "China"

                });

            }



            // Calculate the total pages

            totalPage = itemcount / itemPerPage;

            if (itemcount % itemPerPage != 0)

            {

                totalPage += 1;

            }



            view.Source = customers;



            view.Filter += new FilterEventHandler(view_Filter);



            this.listView1.DataContext = view;

            ShowCurrentPageIndex();

            this.tbTotalPage.Text = totalPage.ToString();

        }



        void view_Filter(object sender, FilterEventArgs e)

        {

            int index = customers.IndexOf((Customer)e.Item);



            if (index >= itemPerPage * currentPageIndex && index < itemPerPage * (currentPageIndex + 1))

            {

                e.Accepted = true;

            }

            else

            {

                e.Accepted = false;

            }

        }



        private void btnFirst_Click(object sender, RoutedEventArgs e)

        {

            // Display the first page

            if (currentPageIndex != 0)

            {

                currentPageIndex = 0;

                view.View.Refresh();

            }

            ShowCurrentPageIndex();

        }



        private void btnPrev_Click(object sender, RoutedEventArgs e)

        {

            // Display previous page

            if (currentPageIndex > 0)

            {

                currentPageIndex--;

                view.View.Refresh();

            }

            ShowCurrentPageIndex();

        }



        private void btnNext_Click(object sender, RoutedEventArgs e)

        {

            // Display next page

            if (currentPageIndex < totalPage - 1)

            {

                currentPageIndex++;

                view.View.Refresh();

            }

            ShowCurrentPageIndex();

        }



        private void btnLast_Click(object sender, RoutedEventArgs e)

        {

            // Display the last page

            if (currentPageIndex != totalPage - 1)

            {

                currentPageIndex = totalPage - 1;

                view.View.Refresh();

            }

            ShowCurrentPageIndex();

        }

    }

}