XML
复制代码
<UserControl
x:Class="CTMVVMDemo.View.UserControls.DataPager"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:local="clr-namespace:CTMVVMDemo.View.UserControls"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
Name="userControl"
d:DesignHeight="450"
d:DesignWidth="800"
mc:Ignorable="d">
<Grid>
<!--
一个视图数据源一般情况来自两处：
1。ViewModel
2。.cs文件
-->
<StackPanel
HorizontalAlignment="Right"
VerticalAlignment="Center"
Orientation="Horizontal">
<TextBlock Text="共" />
<TextBlock Margin="4,0" Text="{Binding TotalCount, ElementName=userControl}" />
<TextBlock Text="条记录，每页" />
<ComboBox
Grid.Column="0"
Width="60"
Height="24"
Margin="5,0,0,0"
Padding="0"
VerticalAlignment="Center"
HorizontalContentAlignment="Center"
VerticalContentAlignment="Center"
Cursor="Hand"
ItemsSource="{Binding ElementName=userControl, Path=PageSizes}"
SelectedItem="{Binding PageSize, ElementName=userControl}" />
<TextBlock Text="条，第" />
<TextBlock Margin="4,0,2,0" Text="{Binding PageIndex, ElementName=userControl}" />
<TextBlock Text="/" />
<TextBlock Margin="2,0,4,0" Text="{Binding PageCount, ElementName=userControl}" />
<TextBlock Text="页" />
<Button
x:Name="btnFirst"
Margin="10,0,0,0"
VerticalAlignment="Center"
Click="btnFirst_Click"
Content="首页"
FontSize="14"
IsEnabled="{Binding CanGoFirstOrPrev, ElementName=userControl}" />
<Button
x:Name="btnPrev"
Margin="10,0,0,0"
VerticalAlignment="Center"
Click="btnPrev_Click"
Content="上一页"
FontSize="14"
IsEnabled="{Binding CanGoFirstOrPrev, ElementName=userControl}" />
<Button
x:Name="btnNext"
Margin="10,0,10,0"
VerticalAlignment="Center"
Click="btnNext_Click"
Content="下一页"
FontSize="14"
IsEnabled="{Binding CanGoLastOrNext, ElementName=userControl}" />
<Button
x:Name="btnLast"
Margin="10,0,10,0"
VerticalAlignment="Center"
Click="btnLast_Click"
Content="末页"
FontSize="14"
IsEnabled="{Binding CanGoLastOrNext, ElementName=userControl}" />
</StackPanel>
</Grid>
</UserControl>
cs
复制代码
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Text.RegularExpressions;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
namespace CTMVVMDemo.View.UserControls
{
public partial class DataPager : UserControl, INotifyPropertyChanged
{
public DataPager()
{
InitializeComponent();
}
#region 路由事件
public static readonly RoutedEvent PageChangedEvent = EventManager.RegisterRoutedEvent(
"PageChanged",
RoutingStrategy.Bubble,
typeof(RoutedEventHandler),
typeof(DataPager));
public event RoutedEventHandler PageChanged
{
add { AddHandler(PageChangedEvent, value); }
remove { RemoveHandler(PageChangedEvent, value); }
}
#endregion
#region 依赖属性
/// <summary>
/// 当前页
/// </summary>
public int PageIndex
{
get { return (int)GetValue(PageIndexProperty); }
set { SetValue(PageIndexProperty, value); }
}
public static readonly DependencyProperty PageIndexProperty =
DependencyProperty.Register(
"PageIndex",
typeof(int),
typeof(DataPager),
new UIPropertyMetadata(1, (sender, e) =>
{
var dp = sender as DataPager;
if (dp == null) return;
dp.ChangeNavigationButtonState();
}));
/// <summary>
/// 每页显示条数
/// </summary>
public int PageSize
{
get { return (int)GetValue(PageSizeProperty); }
set { SetValue(PageSizeProperty, value); }
}
public static readonly DependencyProperty PageSizeProperty =
DependencyProperty.Register(
"PageSize",
typeof(int),
typeof(DataPager),
new UIPropertyMetadata(10, (sender, e) =>
{
var dp = sender as DataPager;
if (dp == null) return;
dp.InitData();
dp.OnPageChanging(1);
dp.ChangeNavigationButtonState();
}));
/// <summary>
/// 总记录数量
/// </summary>
public int TotalCount
{
get { return (int)GetValue(TotalCountProperty); }
set
{
SetValue(TotalCountProperty, value);
}
}
public static readonly DependencyProperty TotalCountProperty =
DependencyProperty.Register(
"TotalCount",
typeof(int),
typeof(DataPager),
new UIPropertyMetadata(0, (sender, e) =>
{
var dp = sender as DataPager;
if (dp == null) return;
dp.InitData();
dp.ChangeNavigationButtonState();
}));
/// <summary>
/// 总页数
/// </summary>
public int PageCount
{
get { return (int)GetValue(PageCountProperty); }
private set { SetValue(PageCountProperty, value); }
}
public static readonly DependencyProperty PageCountProperty =
DependencyProperty.Register("PageCount", typeof(int), typeof(DataPager), new UIPropertyMetadata(1));
public List<int> PageSizes
{
get { return (List<int>)GetValue(PageSizesProperty); }
set { SetValue(PageSizesProperty, value); }
}
public static readonly DependencyProperty PageSizesProperty =
DependencyProperty.Register(
"PageSizes",
typeof(List<int>),
typeof(DataPager),
new PropertyMetadata(new List<int>() { 1, 10, 20, 30, 40, 50 })
);
#endregion 依赖属性
#region 初始化
/// <summary>
/// 初始化数据
/// </summary>
void InitData()
{
// 根据记录总数计算总页数
if (TotalCount == 0)
PageCount = 1;
else
PageCount = TotalCount % PageSize > 0 ? (TotalCount / PageSize) + 1 : TotalCount / PageSize;
// 防止非法数据
if (PageIndex < 1)
PageIndex = 1;
if (PageIndex > PageCount)
PageIndex = PageCount;
if (PageSize < 1)
PageSize = 10;
}
#endregion
#region 按钮逻辑
/// <summary>
/// 点击首页按钮
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnFirst_Click(object sender, RoutedEventArgs e)
{
OnPageChanging(1);
}
/// <summary>
/// 点击上一页按钮
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnPrev_Click(object sender, RoutedEventArgs e)
{
OnPageChanging(PageIndex - 1);
}
/// <summary>
/// 点击下一页按钮
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnNext_Click(object sender, RoutedEventArgs e)
{
OnPageChanging(PageIndex + 1);
}
/// <summary>
/// 点击末页按钮
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnLast_Click(object sender, RoutedEventArgs e)
{
OnPageChanging(PageCount);
}
private void TxtPageIndex_PreviewTextInput(object sender, TextCompositionEventArgs e)
{
Regex re = new Regex("[^0-9]+");
e.Handled = re.IsMatch(e.Text);
}
/// <summary>
/// 点击跳转按钮
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnGoTo_Click(object sender, RoutedEventArgs e)
{
int pageIndex = 1;
try
{
//pageIndex = Convert.ToInt32(txtPageIndex.Text);
}
catch
{
}
finally
{
OnPageChanging(pageIndex);
}
}
#endregion
/// <summary>
/// 页码更改
/// </summary>
/// <param name="pageIndex"></param>
private void OnPageChanging(int pageIndex)
{
if (pageIndex < 1) pageIndex = 1;
if (pageIndex > PageCount) pageIndex = PageCount;
var eventArgs = new RoutedEventArgs(PageChangedEvent, this);
PageIndex = pageIndex;
RaiseEvent(eventArgs);
}
#region 控制按钮状态
/// <summary>
/// 是否可以点击首页和上一页按钮
/// </summary>
public bool CanGoFirstOrPrev
{
get
{
if (PageIndex <= 1) return false;
return true;
}
}
/// <summary>
/// 是否可以点击最后页和下一页按钮
/// </summary>
public bool CanGoLastOrNext
{
get
{
if (PageIndex >= PageCount) return false;
return true;
}
}
/// <summary>
/// 通知导航按钮(首页,上一页,下一页,末页)状态的更改
/// </summary>
void ChangeNavigationButtonState()
{
OnPropertyChanged("CanGoFirstOrPrev");
OnPropertyChanged("CanGoLastOrNext");
}
#endregion
#region INotifyPropertyChanged成员
public event PropertyChangedEventHandler PropertyChanged;
public void OnPropertyChanged(string propertyName)
{
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
}
#endregion INotifyPropertyChanged成员
}
}
