简单翻页控件

wpf

demo

// 1
<UC_PagerSimple x:Name="paper" GetDataDelegateHandler="GetData"/>
// 2
private void GetData(int pageNo, int pageSize)
{
dgData.ItemsSource = response.Body.ResultList;
paper.ReceivePageCount(response.Body.ResultList.Count);
}
// 3
paper.GotoFirstPage();

XAML

<UserControl>
    <StackPanel Orientation="Horizontal" HorizontalAlignment="Center" VerticalAlignment="Center">
        <TextBlock Height="20" Text="当前" VerticalAlignment="Center" />
        <TextBlock Height="20" Name="currentCountTbk" Foreground="Red" VerticalAlignment="Center" />
        <TextBlock Height="20" Text="条记录  " VerticalAlignment="Center" />
        <TextBlock Height="20" Text="第" VerticalAlignment="Center" />
        <TextBlock Height="20" Name="pageNoTbk" Foreground="Red" VerticalAlignment="Center" />
        <TextBlock Height="20" Text="页 " VerticalAlignment="Center" />

        <TextBlock Height="20" Text="每页显示" Visibility="Collapsed" Width="0"/>
        <TextBox Name="pageSizeTb" Visibility="Hidden" Width="0"></TextBox>
        <Button Name="setPageSizeBtn" Content="设置" Visibility="Collapsed" Click="SetPageSizeBtn_Click" Width="0"/>

        <Button Name="firstPageBtn" Width="50"  Margin="2,4" Content="首页" Click="FirstPageBtn_Click" Visibility="Collapsed"/>
        <Button Name="prePageBtn" Width="50" Margin="2,4" Content="上一页" Click="PrePageBtn_Click"/>
        <Button Name="nextPageBtn" Width="50" Margin="2,4" Content="下一页" Click="NextPageBtn_Click"/>
        <Button Name="lastPageBtn" Width="50" Margin="2,4" Content="末页" Click="LastPageBtn_Click" Visibility="Collapsed"/>

        <TextBlock Height="20" Text="转到" Margin="5" VerticalAlignment="Center"/>
        <TextBox Name="gotoPageNoTb" Width="40" Margin="2,5" />
        <TextBlock Height="20" Text="页" Margin="2,5" VerticalAlignment="Center"/>
        <Button Content="跳转" Click="GotoBtn_Click" Width="50" Margin="2,4" />
        <Button Content="刷新" Click="RefreshBtn_Click" Visibility="Collapsed"/>
    </StackPanel>
</UserControl>

cs

public partial class UC_PagerSimple : UserControl
{
    /// <summary>
    /// 每页记录数
    /// </summary>
    private int _pageSize = 25;
    /// <summary>
    /// 当前页记录数
    /// </summary>
    private int _currentCount = 0;
    /// <summary>
    /// 总页数
    /// </summary>
    private int _pageCount = 1;
    /// <summary>  
    /// 获取数据委托，返回总记录数  
    /// </summary>  
    /// <param name="pageNo">请求页</param>  
    /// <param name="pageSize">每页记录数</param>  
    /// <returns>总记录数</returns> 
    public Action<int, int> GetDataDelegateHandler
    {
        set; private get;
    }
    public int PageSize
    {
        get
        {
            return _pageSize;
        }
        set
        {
            if (value > 0)
            {
                _pageSize = value;
            }
        }
    }
    /// <summary>
    /// 当前页索引，1开头
    /// </summary>
    public int PageIndex { get; set; } = 1;

    public UC_PagerSimple()
    {
        InitializeComponent();
    }

    void InitPager()
    {
        this.prePageBtn.IsEnabled = true;
        this.nextPageBtn.IsEnabled = true;
        _pageCount = 10000000;
        _currentCount = 0;
        gotoPageNoTb.Text = string.Empty;
    }
    /// <summary>  
    /// 刷新当前页  
    /// </summary>  
    public void Refresh()
    {
        SendGotoPage(PageIndex);
    }
    /// <summary>
    /// 显示首页数据
    /// </summary>
    public void GotoFirstPage()
    {
        InitPager();
        SendGotoPage(1);
    }

    public void GotoLastPage()
    {
        SendGotoPage(_pageCount);
    }
    /// <summary>
    /// 跳转
    /// </summary>
    /// <param name="pageNo"></param>
    public void SendGotoPage(int pageNo)
    {
        if (pageNo <= 0)
        {
            pageNo = 1;
        }

        this.PageIndex = pageNo;

        try
        {
            GetDataDelegateHandler(pageNo, _pageSize);
        }
        catch (Exception)
        {
            this.pageNoTbk.Text = "";
        }
    }
    /// <summary>
    /// 初始化控件显示
    /// </summary>
    /// <param name="itemCount">当前页数</param>
    public void ReceivePageCount(int itemCount)
    {
        try
        {
            if (itemCount < 0)
            {
                firstPageBtn.IsEnabled = true;
                lastPageBtn.IsEnabled = false;

                currentCountTbk.Text = "很多";

                InitPager();
            }
            else
            {
                _currentCount = itemCount;

                // 页码显示  
                this.currentCountTbk.Text = _currentCount + "";
                this.pageNoTbk.Text = PageIndex + "";
                this.pageSizeTb.Text = _pageSize + "";

                // 更新总页数
                if (itemCount == 0 || itemCount < _pageSize)
                {
                    _pageCount = PageIndex;
                }

                // 按钮状态  
                this.prePageBtn.IsEnabled = PageIndex > 1;
                this.nextPageBtn.IsEnabled = PageIndex < _pageCount;
            }
        }
        catch (Exception)
        {
            this.pageNoTbk.Text = "";
        }
    }

    // 设置页显示记录数   
    private void SetPageSizeBtn_Click(object sender, RoutedEventArgs e)
    {
        try
        {
            int pageSize = Convert.ToInt32(this.pageSizeTb.Text);
            if (pageSize > 0)
            {
                this._pageSize = pageSize;
                this.GotoFirstPage();
            }
            else
            {
                this.pageSizeTb.Text = this._pageSize + "";
            }
        }
        catch (Exception)
        {
            this.pageSizeTb.Text = this._pageSize + "";
        }
    }

    // 首页事件     
    private void FirstPageBtn_Click(object sender, RoutedEventArgs e)
    {
        GotoFirstPage();
    }

    // 上一页事件     
    private void PrePageBtn_Click(object sender, RoutedEventArgs e)
    {
        if (PageIndex > 1)
        {
            PageIndex--;
            SendGotoPage(PageIndex);
        }
    }

    // 下一页事件    
    private void NextPageBtn_Click(object sender, RoutedEventArgs e)
    {
        if (PageIndex < _pageCount)
        {
            PageIndex++;
            SendGotoPage(PageIndex);
        }
    }

    // 末页事件    
    private void LastPageBtn_Click(object sender, RoutedEventArgs e)
    {
        GotoLastPage();
    }

    // 跳转事件    
    private void GotoBtn_Click(object sender, RoutedEventArgs e)
    {
        if (int.TryParse(this.gotoPageNoTb.Text, out int pageNo) && pageNo >= 1 && pageNo <= _pageCount)
        {
            SendGotoPage(pageNo);
        }
    }

    // 刷新  
    private void RefreshBtn_Click(object sender, RoutedEventArgs e)
    {
        Refresh();
    }

}

prism

XAML

<StackPanel Orientation="Horizontal" HorizontalAlignment="Center" VerticalAlignment="Center">
  <TextBlock Height="20" Text="当前" VerticalAlignment="Center" />
  <TextBlock Height="20" Text="{Binding CurrentPageCount, RelativeSource={RelativeSource AncestorType={x:Type UserControl}}, Mode=TwoWay}" Foreground="Red" VerticalAlignment="Center" />
  <TextBlock Height="20" Text="条记录  " VerticalAlignment="Center" />
  <TextBlock Height="20" Text="第" VerticalAlignment="Center" />
  <TextBlock Height="20" Text="{Binding PageIndex, RelativeSource={RelativeSource AncestorType={x:Type UserControl}}, Mode=TwoWay}" Foreground="Red" VerticalAlignment="Center" />
  <TextBlock Height="20" Text="页 " VerticalAlignment="Center" />

  <Button Name="prePageBtn" Width="50" Margin="2,4" Content="上一页" Click="PrePageBtn_Click"/>
  <Button Name="nextPageBtn" Width="50" Margin="2,4" Content="下一页" Click="NextPageBtn_Click"/>

  <TextBlock Height="20" Text="转到" Margin="5" VerticalAlignment="Center"/>
  <TextBox Name="gotoPageNoTb" Width="40" Margin="2,5" />
  <TextBlock Height="20" Text="页" Margin="2,5" VerticalAlignment="Center"/>
  <Button Content="跳转" Click="GotoBtn_Click" Width="50" Margin="2,4" />
</StackPanel>

cs

using System;
using System.Windows;
using System.Windows.Controls;
public partial class PagerSimple : UserControl
{
  /// <summary>
  /// 翻页响应事件
  /// </summary>
  public event EventHandler PageChangedEvent;

  /// <summary>
  /// 每页项目条数，默认25
  /// </summary>
  public int PageSize
  {
      get { return (int)GetValue(PageSizeProperty); }
      set { SetValue(PageSizeProperty, value); }
  }
  public static readonly DependencyProperty PageSizeProperty =
      DependencyProperty.Register("PageSize", typeof(int), typeof(PagerSimple), new PropertyMetadata(25));


  /// <summary>
  /// 当前页索引，1开头
  /// </summary>
  public int PageIndex
  {
      get { return (int)GetValue(PageIndexProperty); }
      set { SetValue(PageIndexProperty, value); }
  }
  public static readonly DependencyProperty PageIndexProperty =
      DependencyProperty.Register("PageIndex", typeof(int), typeof(PagerSimple), new PropertyMetadata(1));


  /// <summary>
  /// 总页数
  /// </summary>
  public int TotalPage
  {
      get { return (int)GetValue(TotalPageProperty); }
      set { SetValue(TotalPageProperty, value); }
  }
  public static readonly DependencyProperty TotalPageProperty =
      DependencyProperty.Register("TotalPage", typeof(int), typeof(PagerSimple), new PropertyMetadata(0));

  /// <summary>
  /// 当前页项目条数
  /// </summary>
  public int CurrentPageCount
  {
      get { return (int)GetValue(CurrentPageCountProperty); }
      set { SetValue(CurrentPageCountProperty, value); }
  }
  public static readonly DependencyProperty CurrentPageCountProperty =
      DependencyProperty.Register("CurrentPageCount", typeof(int), typeof(PagerSimple), new PropertyMetadata(0, OnCurrentPageCountChanged));
  private static void OnCurrentPageCountChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
  {
      var ctl = (PagerSimple)d;
      ctl.OnCurrentPageCountChanged((int)e.NewValue);
  }
  private void OnCurrentPageCountChanged(int newValue)
  {
      // 更新总页数
      if (newValue == 0 || newValue < PageSize)
      {
          TotalPage = PageIndex;
          this.nextPageBtn.IsEnabled = false;
      }
  }

  public bool IsPagerInitialized
  {
      get { return (bool)GetValue(IsPagerInitializedProperty); }
      set { SetValue(IsPagerInitializedProperty, value); }
  }
  public static readonly DependencyProperty IsPagerInitializedProperty =
      DependencyProperty.Register("IsPagerInitialized", typeof(bool), typeof(PagerSimple), new PropertyMetadata(false, OnIsPagerInitializedChanged));
  private static void OnIsPagerInitializedChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
  {
      var ctl = (PagerSimple)d;
      ctl.OnIsPagerInitializedChanged((bool)e.NewValue);
  }
  private void OnIsPagerInitializedChanged(bool newValue)
  {
      if (newValue)
      {
          InitPager();
      }
  }

  public PagerSimple()
  {
      InitializeComponent();
      InitPager();
  }

  void InitPager()
  {
      this.prePageBtn.IsEnabled = false;
      this.nextPageBtn.IsEnabled = true;
      TotalPage = 10_000_000;
      PageIndex = 1;
      gotoPageNoTb.Text = string.Empty;
  }

  /// <summary>
  /// 事件响应方法
  /// </summary>
  /// <param name="pageNo"></param>
  public void PageChangedEventFunc()
  {
      try
      {
          // 按钮状态  
          this.prePageBtn.IsEnabled = PageIndex > 1;
          this.nextPageBtn.IsEnabled = PageIndex < TotalPage;
          var args = new PagerSimpleEventArgs
          {
              PageIndex = PageIndex,
              PageSize = PageSize,
          };
          PageChangedEvent(this, args);
      }
      catch (Exception ex)
      {
          Console.WriteLine(ex.Message);
      }
  }

  // 上一页事件     
  private void PrePageBtn_Click(object sender, RoutedEventArgs e)
  {
      if (PageIndex > 1)
      {
          IsPagerInitialized = false;
          PageIndex--;
          PageChangedEventFunc();
      }
  }

  // 下一页事件    
  private void NextPageBtn_Click(object sender, RoutedEventArgs e)
  {
      if (PageIndex < TotalPage)
      {
          IsPagerInitialized = false;
          PageIndex++;
          PageChangedEventFunc();
      }
  }

  // 跳转事件    
  private void GotoBtn_Click(object sender, RoutedEventArgs e)
  {
      if (int.TryParse(this.gotoPageNoTb.Text, out int pageNo) && pageNo >= 1 && pageNo <= TotalPage)
      {
          IsPagerInitialized = false;
          PageIndex = pageNo;
          PageChangedEventFunc();
      }
  }

}

public class PagerSimpleEventArgs : EventArgs
{
  public int PageIndex { get; set; }
  public int PageSize { get; set; }
}

demo

<comm:PagerSimple PageSize="{Binding SelectedItem.PagerSize, Mode=TwoWay}"
                CurrentPageCount="{Binding SelectedItem.CurrentPageCount, Mode=TwoWay}"
                IsPagerInitialized="{Binding SelectedItem.IsPagerInitialized, Mode=TwoWay}">
  <b:Interaction.Triggers>
      <b:EventTrigger EventName="PageChangedEvent">
          <b:InvokeCommandAction Command="{Binding GetDataCommand}" PassEventArgsToCommand="True"/>
      </b:EventTrigger>
  </b:Interaction.Triggers>
</comm:PagerSimple>

private void GetData_Click(object parameter)
{
   if (parameter is PagerSimpleEventArgs e)
   {
       var indx = e.PageIndex;
       var size = e.PageSize;
   }
}