WPF使用MVVM实现数据分页组件
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前台代码
<UserControl x:Class="GasWpf.View.ucPage" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:local="clr-namespace:GasWpf.View" mc:Ignorable="d" d:DesignHeight="50" d:DesignWidth="800"> <DockPanel Margin="12"> <TextBlock DockPanel.Dock="Left" Margin="0,0,6,0" FontSize="16" VerticalAlignment="Center">Show</TextBlock> <TextBox DockPanel.Dock="Left" Width="30" MaxLength="3" FontSize="16" Text="{Binding PageSize,Mode=TwoWay}"> </TextBox> <TextBlock DockPanel.Dock="Left" VerticalAlignment="Center" FontSize="16">/ Page</TextBlock> <StackPanel Orientation="Horizontal" DockPanel.Dock="Right"> <TextBlock VerticalAlignment="Center" FontSize="16" Margin="0,0,12,0"> <TextBlock>Total</TextBlock> <TextBlock Text="{Binding Total}" Foreground="#ed4014"/> </TextBlock> <ItemsControl ItemsSource="{Binding PageNumber}"> <ItemsControl.ItemTemplate> <DataTemplate> <WrapPanel> <Button Command="{Binding PageChange}" CommandParameter="{Binding Value}" ToolTip="{Binding ToolTip}" IsEnabled="{Binding IsEnabled}" Foreground="#515a6e" BorderBrush="{Binding BackGround}" Background="{Binding BackGround}" Content="{Binding Name}" Margin="3,0,3,0" /> </WrapPanel> </DataTemplate> </ItemsControl.ItemTemplate> <ItemsControl.ItemsPanel> <ItemsPanelTemplate> <WrapPanel Orientation="Horizontal"/> </ItemsPanelTemplate> </ItemsControl.ItemsPanel> </ItemsControl> </StackPanel> <TextBlock></TextBlock> </DockPanel> </UserControl>
cs代码
using GalaSoft.MvvmLight.Command; using GasWpf.Model; using System; using System.Collections.Generic; using System.Windows; using System.Windows.Controls; namespace GasWpf.View { /// <summary> /// ucPage.xaml 的交互逻辑 /// </summary> public partial class ucPage : UserControl { public ucPage() { InitializeComponent(); } #region 每页显示的条数 /// <summary> /// 注册每页数 /// </summary> public static readonly DependencyProperty PageSizeProperty = DependencyProperty.Register("PageSize", typeof(int), typeof(ucPage), new PropertyMetadata(new PropertyChangedCallback(OnPageSizeChanged))); /// <summary> /// 每页数 /// </summary> public int PageSize { get { return Convert.ToInt32(GetValue(PageSizeProperty)); } set { SetValue(PageSizeProperty, value); } } #endregion #region 当前页 /// <summary> /// 注册当前页 /// </summary> public static readonly DependencyProperty PageIndexProperty = DependencyProperty.Register("PageIndex", typeof(int), typeof(ucPage), new PropertyMetadata(new PropertyChangedCallback(OnPageChanged))); /// <summary> /// 当前页 /// </summary> public int PageIndex { get { return Convert.ToInt32(GetValue(PageIndexProperty)); } set { SetValue(PageIndexProperty, value); } } private static void OnPageSizeChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e) { ucPage uc = (ucPage)sender; uc.PageIndex = 1; uc.pagination(); } private static void OnPageChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e) { ((ucPage)sender).pagination(); } #endregion #region 总记录数 /// <summary> /// 总记录数 /// </summary> public static readonly DependencyProperty TotalProperty = DependencyProperty.Register("Total", typeof(int), typeof(ucPage), new PropertyMetadata(new PropertyChangedCallback(OnPageChanged))); /// <summary> /// 总记录数 /// </summary> public int Total { get { return Convert.ToInt32(GetValue(TotalProperty)); } set { SetValue(TotalProperty, value); } } #endregion private void pagination() { if (Total == 0 || PageSize ==0) return; int _totalPage = Total / PageSize; if (Total % PageSize > 0) { _totalPage++; } List<Paging> pn = new List<Paging> { new Paging() { Name = "<", ToolTip = "上一页", PageChange = Changed(), Value = PageIndex -1, IsEnabled = PageIndex!=1&&_totalPage!=1 } }; pn.Add(new Paging() { Name = "1", ToolTip = "1", Value = 1, PageChange = Changed(), IsEnabled = true, BackGround = PageIndex == 1 ? "#b39ddb" : "#ede7f6" }); int begin = PageIndex >= 6 ? PageIndex - 3 : 2; int end = PageIndex + 3 >= _totalPage ? _totalPage - 1 : PageIndex + 3; for (int i = begin; i <= end; i++) { Paging p = new Paging() { Value = i, Name = i.ToString(), IsEnabled = true, ToolTip = i.ToString(), PageChange = Changed() }; if (i == PageIndex) { p.BackGround = "#b39ddb"; } if (i == begin && PageIndex - begin >= 3 && PageIndex > 5) { p.Value = PageIndex - 5; p.Name = "..."; p.ToolTip = "向前5页"; } else if (i == end && end - PageIndex >= 3 && _totalPage - PageIndex >= 5) { p.Value = PageIndex + 5; p.Name = "..."; p.ToolTip = "向后5页"; } pn.Add(p); } if (_totalPage > 1) { pn.Add(new Paging() { Name = _totalPage.ToString(), ToolTip = _totalPage.ToString(), PageChange = Changed(), Value = _totalPage, IsEnabled = true, BackGround = PageIndex == _totalPage ? "#b39ddb" : "#ede7f6" }); } pn.Add(new Paging() { Name = ">", ToolTip = "下一页", Value = PageIndex + 1, PageChange = Changed(), IsEnabled = PageIndex != _totalPage && _totalPage != 1 }); PageNumber = pn; } private RelayCommand<int> Changed() { return new RelayCommand<int>((arg) => { PageIndex = arg; }); } public static readonly DependencyProperty PageNumberProperty = DependencyProperty.Register("PageNumber", typeof(List<Paging>), typeof(ucPage)); /// <summary> /// 分页信息 /// </summary> public List<Paging> PageNumber { get { return (List<Paging>)GetValue(PageNumberProperty); } set { SetValue(PageNumberProperty, value); } } } }
ViewModel代码
using GalaSoft.MvvmLight; using GalaSoft.MvvmLight.Command; using GasWpf.Model; using System; using System.Collections.Generic; using System.Windows.Input; namespace GasWpf.ViewModel { public class PageVM : ViewModelBase { public PageVM() { } private void pagination() { TotalPage = Total / PageSize; if (Total % PageSize > 0) { TotalPage++; } List<Paging> pn = new List<Paging> { new Paging() { Name = "<", ToolTip = "上一页", PageChange = Changed(), Value = _pageIndex -1, IsEnabled = _pageIndex!=1 } }; pn.Add(new Paging() { Name = "1", ToolTip = "1", Value =1, PageChange = Changed(), IsEnabled = true, BackGround = _pageIndex==1? "#b39ddb" : "#ede7f6" }); int begin = _pageIndex >= 6 ? _pageIndex - 3 : 2; int end = _pageIndex + 3 >= TotalPage ? TotalPage-1 : _pageIndex + 3; for (int i = begin; i <= end; i++) { Paging p = new Paging() { Value = i, Name = i.ToString(), IsEnabled = true, ToolTip = i.ToString(), PageChange = Changed() }; if (i == _pageIndex) { p.BackGround = "#b39ddb"; } if (i == begin && _pageIndex - begin >= 3 && _pageIndex > 5) { p.Value = _pageIndex - 5; p.Name = "..."; p.ToolTip = "向前5页"; } else if (i==end && end - _pageIndex >= 3 && TotalPage - _pageIndex >= 5) { p.Value = _pageIndex + 5; p.Name = "..."; p.ToolTip = "向后5页"; } pn.Add(p); } if (TotalPage > 1) { pn.Add(new Paging() { Name = TotalPage.ToString(), ToolTip = TotalPage.ToString(), PageChange = Changed(), Value = TotalPage, IsEnabled = true, BackGround = _pageIndex == TotalPage ? "#b39ddb" : "#ede7f6" }); } pn.Add(new Paging() { Name = ">", ToolTip = "下一页", Value = _pageIndex+1, PageChange = Changed(), IsEnabled = _pageIndex != TotalPage }); PageNumber = pn; } private RelayCommand<int> Changed() { return new RelayCommand<int>((arg) => { PageIndex = arg; }); } private int _total; public int Total { get { return _total; } set { _total = value; RaisePropertyChanged(() => Total); } } private int _pageSize = 15; public int PageSize { get { return _pageSize; } set { _pageSize = value; RaisePropertyChanged(() => PageSize); } } private int _pageIndex = 1; public int PageIndex { get { return _pageIndex; } set { _pageIndex = value; RaisePropertyChanged(() => PageIndex); } } private int _totalPage = 0; public int TotalPage { get { return _totalPage; } set { _totalPage = value; RaisePropertyChanged(() => TotalPage); } } private List<Paging> _pageNumber; public List<Paging> PageNumber { get { return _pageNumber; } set { _pageNumber = value; RaisePropertyChanged(() => PageNumber); } } } }
演示程序下载
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