概要
本文将详细介绍如何使用WPF(Windows Presentation Foundation)开发一个分页控件,并深入解析其实现原理。我们将通过使用XAML和C#代码相结合的方式构建分页控件,并确保它具有高度的可定制性,以便在不同的应用场景中满足各种需求。
一.简介
分页控件是在许多应用程序中常见的一种界面元素,特别是在数据展示的场景中。它允许用户浏览大量数据,并根据需要切换到不同的数据页。
二.需求分析
我们首先来分析一下一个分页控件的基本构成。
2.1 总条目数(TotalItems)
表示总数据量。
2.2 每页条目数(PageSize)
表示每页显示的条目数。
2.3 总页数(PageCount)
表示根据总条目数与每页条目数计算出来的页数。
2.4 分页/页码按钮数量(PageNumberCount)
分页控件中可以点击的页码按钮。
2.5 当前页(CurrentPage)
当前显示的页,通常高亮显示。
三.控件命令和事件
3.1 页面跳转命令(GoToPageCommand)
该命令用于在XAML代码中触发页面跳转操作。
3.2当前页变更事件
当CurrentPage参数改变后触发该事件,通常在该事件中执行数据查询操作。
四.代码实现
通过以上原理分析,我们提取出了分页控件需要包含的基本要素,下面我们通过这些信息来组装成一个分页控件。
<Style TargetType="{x:Type local:Pager}"> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type local:Pager}"> <Border Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}"> <StackPanel Orientation="Horizontal" ClipToBounds="True"> <Button Command="{x:Static local:Pager.GoToPageCommand}" CommandParameter="1" Margin="0,0,5,0" Content="首页"></Button> <Button Command="{x:Static local:Pager.GoToPageCommand}" CommandParameter="-" Margin="5,0" Content="上一页"></Button> <ItemsControl ItemsSource="{TemplateBinding PageButtons}"> <ItemsControl.ItemsPanel> <ItemsPanelTemplate> <StackPanel Orientation="Horizontal"/> </ItemsPanelTemplate> </ItemsControl.ItemsPanel> <ItemsControl.ItemTemplate> <DataTemplate> <ToggleButton MinWidth="{Binding RelativeSource={RelativeSource Mode=Self},Path=ActualHeight}" Content="{Binding Page}" IsChecked="{Binding IsCurrentPage}" Command="{x:Static local:Pager.GoToPageCommand}" CommandParameter="{Binding Page}" Margin="5,0"/> </DataTemplate> </ItemsControl.ItemTemplate> </ItemsControl> <Button Command="{x:Static local:Pager.GoToPageCommand}" CommandParameter="+" Margin="5,0" Content="下一页"></Button> <Button Command="{x:Static local:Pager.GoToPageCommand}" CommandParameter="尾页" Margin="5,0,0,0" Content="{DynamicResource LastPage}"></Button> </StackPanel> </Border> </ControlTemplate> </Setter.Value> </Setter> </Style>
五.多样化需求
在不同的业务场景下需要的分页控件可能不尽相同,那么如何来满足多样化需求呢,答案就是自定义控件模板。下面演示几种常见的分页控件如何实现。
只需要“上一页”、“下一页”的情况
<Style TargetType="{x:Type Controls:Pager}"> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type Controls:Pager}"> <Border Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}"> <StackPanel Orientation="Horizontal" ClipToBounds="True"> <Button Command="{x:Static Controls:Pager.GoToPageCommand}" CommandParameter="-" Margin="5,0" Content="{DynamicResource PreviousPage}"></Button> <Button Command="{x:Static Controls:Pager.GoToPageCommand}" CommandParameter="+" Margin="5,0" Content="{DynamicResource NextPage}"></Button> </StackPanel> </Border> </ControlTemplate> </Setter.Value> </Setter> </Style>
只需要“首页”、“上一页”、“下一页”、“尾页”的情况。
<Style TargetType="{x:Type Controls:Pager}"> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type Controls:Pager}"> <Border Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}"> <StackPanel Orientation="Horizontal" ClipToBounds="True"> <Button Command="{x:Static Controls:Pager.GoToPageCommand}" CommandParameter="1" Margin="0,0,5,0" Content="{DynamicResource FirstPage}"></Button> <Button Command="{x:Static Controls:Pager.GoToPageCommand}" CommandParameter="-" Margin="5,0" Content="{DynamicResource PreviousPage}"></Button> <Button Command="{x:Static Controls:Pager.GoToPageCommand}" CommandParameter="+" Margin="5,0" Content="{DynamicResource NextPage}"></Button> <Button Command="{x:Static Controls:Pager.GoToPageCommand}" CommandParameter="{TemplateBinding PageCount}" Margin="5,0,0,0" Content="{DynamicResource LastPage}"></Button> </StackPanel> </Border> </ControlTemplate> </Setter.Value> </Setter> </Style>
数字显示“首页”、“尾页”的情况。
<Style TargetType="{x:Type Controls:Pager}"> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type Controls:Pager}"> <Border Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}"> <StackPanel Orientation="Horizontal" ClipToBounds="True"> <Button Command="{x:Static Controls:Pager.GoToPageCommand}" CommandParameter="1" Content="1" MinWidth="{Binding RelativeSource={RelativeSource Mode=Self},Path=ActualHeight}" Margin="0,0,5,0"> <Button.Visibility> <MultiBinding Converter="{StaticResource PageNumberToVisibilityConverter}" ConverterParameter="First"> <Binding RelativeSource="{RelativeSource AncestorType=Controls:Pager}" Path="CurrentPage"/> <Binding RelativeSource="{RelativeSource AncestorType=Controls:Pager}" Path="PageNumberCount"/> <Binding RelativeSource="{RelativeSource AncestorType=Controls:Pager}" Path="PageCount"/> </MultiBinding> </Button.Visibility> </Button> <Button IsEnabled="False" Margin="5,0" MinWidth="{Binding RelativeSource={RelativeSource Mode=Self},Path=ActualHeight}" Content="..."> <Button.Visibility> <MultiBinding Converter="{StaticResource PageNumberToVisibilityConverter}" ConverterParameter="First"> <Binding RelativeSource="{RelativeSource AncestorType=Controls:Pager}" Path="CurrentPage"/> <Binding RelativeSource="{RelativeSource AncestorType=Controls:Pager}" Path="PageNumberCount"/> <Binding RelativeSource="{RelativeSource AncestorType=Controls:Pager}" Path="PageCount"/> </MultiBinding> </Button.Visibility> </Button> <Button Command="{x:Static Controls:Pager.GoToPageCommand}" CommandParameter="-" Margin="5,0" Content="{DynamicResource PreviousPage}"></Button> <ItemsControl ItemsSource="{TemplateBinding PageButtons}"> <ItemsControl.ItemsPanel> <ItemsPanelTemplate> <StackPanel Orientation="Horizontal"/> </ItemsPanelTemplate> </ItemsControl.ItemsPanel> <ItemsControl.ItemTemplate> <DataTemplate> <ToggleButton MinWidth="{Binding RelativeSource={RelativeSource Mode=Self},Path=ActualHeight}" Content="{Binding Page}" Margin="5,0" IsChecked="{Binding IsCurrentPage}" Command="{x:Static Controls:Pager.GoToPageCommand}" CommandParameter="{Binding Page}"/> </DataTemplate> </ItemsControl.ItemTemplate> </ItemsControl> <Button Command="{x:Static Controls:Pager.GoToPageCommand}" CommandParameter="+" Margin="5,0" Content="{DynamicResource NextPage}"></Button> <Button IsEnabled="False" Margin="5,0" MinWidth="{Binding RelativeSource={RelativeSource Mode=Self},Path=ActualHeight}" Content="..."> <Button.Visibility> <MultiBinding Converter="{StaticResource PageNumberToVisibilityConverter}"> <Binding RelativeSource="{RelativeSource AncestorType=Controls:Pager}" Path="CurrentPage"/> <Binding RelativeSource="{RelativeSource AncestorType=Controls:Pager}" Path="PageNumberCount"/> <Binding RelativeSource="{RelativeSource AncestorType=Controls:Pager}" Path="PageCount"/> </MultiBinding> </Button.Visibility> </Button> <Button Command="{x:Static Controls:Pager.GoToPageCommand}" CommandParameter="{Binding RelativeSource={RelativeSource AncestorType=Controls:Pager},Path=PageCount}" Content="{Binding RelativeSource={RelativeSource AncestorType=Controls:Pager},Path=PageCount}" MinWidth="{Binding RelativeSource={RelativeSource Mode=Self},Path=ActualHeight}" Margin="5,0,0,0"> <Button.Visibility> <MultiBinding Converter="{StaticResource PageNumberToVisibilityConverter}"> <Binding RelativeSource="{RelativeSource AncestorType=Controls:Pager}" Path="CurrentPage"/> <Binding RelativeSource="{RelativeSource AncestorType=Controls:Pager}" Path="PageNumberCount"/> <Binding RelativeSource="{RelativeSource AncestorType=Controls:Pager}" Path="PageCount"/> </MultiBinding> </Button.Visibility> </Button> <StackPanel Orientation="Horizontal" Margin="5,0,0,0"> <TextBlock Text="转到" VerticalAlignment="Center"/> <TextBox x:Name="tbox_Page" Width="40" Margin="5,0" Padding="5" HorizontalContentAlignment="Center" VerticalAlignment="Center"/> <TextBlock Text="页" VerticalAlignment="Center"/> <Button Margin="5,0,0,0" Command="{x:Static Controls:Pager.GoToPageCommand}" CommandParameter="{Binding ElementName=tbox_Page,Path=Text}">确定</Button> </StackPanel> </StackPanel> </Border> </ControlTemplate> </Setter.Value> </Setter> </Style>
可以调整每页显示条目,可以显示总页数,可以跳转到指定页的情况。
<Style TargetType="{x:Type Controls:Pager}"> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type Controls:Pager}"> <Border Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}"> <StackPanel Orientation="Horizontal" ClipToBounds="True"> <Button Command="{x:Static Controls:Pager.GoToPageCommand}" CommandParameter="1" Margin="0,0,5,0" MinWidth="{Binding RelativeSource={RelativeSource Mode=Self},Path=ActualHeight}" Content="{DynamicResource FirstPage}"></Button> <Button Command="{x:Static Controls:Pager.GoToPageCommand}" CommandParameter="-" Margin="5,0" MinWidth="{Binding RelativeSource={RelativeSource Mode=Self},Path=ActualHeight}" Content="{DynamicResource PreviousPage}"></Button> <ItemsControl ItemsSource="{TemplateBinding PageButtons}"> <ItemsControl.ItemsPanel> <ItemsPanelTemplate> <StackPanel Orientation="Horizontal"/> </ItemsPanelTemplate> </ItemsControl.ItemsPanel> <ItemsControl.ItemTemplate> <DataTemplate> <ToggleButton MinWidth="{Binding RelativeSource={RelativeSource Mode=Self},Path=ActualHeight}" Content="{Binding Page}" Margin="5,0" IsChecked="{Binding IsCurrentPage}" Command="{x:Static Controls:Pager.GoToPageCommand}" CommandParameter="{Binding Page}"/> </DataTemplate> </ItemsControl.ItemTemplate> </ItemsControl> <Button Command="{x:Static Controls:Pager.GoToPageCommand}" CommandParameter="+" Margin="5,0" MinWidth="{Binding RelativeSource={RelativeSource Mode=Self},Path=ActualHeight}" Content="{DynamicResource NextPage}"></Button> <Button Command="{x:Static Controls:Pager.GoToPageCommand}" CommandParameter="{TemplateBinding PageCount}" Margin="5,0,0,0" MinWidth="{Binding RelativeSource={RelativeSource Mode=Self},Path=ActualHeight}" Content="{DynamicResource LastPage}"></Button> <StackPanel Orientation="Horizontal" Margin="5,0,0,0"> <TextBlock Margin="0,0,5,0" Text="每页" VerticalAlignment="Center"/> <ComboBox Margin="5,0" SelectedIndex="0" VerticalContentAlignment="Center" SelectedItem="{Binding RelativeSource={RelativeSource AncestorType=Controls:Pager},Path=PageSize,Mode=OneWayToSource}"> <sys:Int32>5</sys:Int32> <sys:Int32>10</sys:Int32> <sys:Int32>15</sys:Int32> <sys:Int32>20</sys:Int32> </ComboBox> <TextBlock Text="条" VerticalAlignment="Center" Margin="5,0"/> <TextBlock VerticalAlignment="Center" Margin="5,0"> <Run Text="共"/> <Run Text="{Binding RelativeSource={RelativeSource AncestorType=Controls:Pager},Path=PageCount}"/> <Run Text="页"/> </TextBlock> <TextBlock Text="转到" VerticalAlignment="Center"/> <TextBox x:Name="tbox_Page" Width="40" Margin="5,0" Padding="5" HorizontalContentAlignment="Center" VerticalAlignment="Center"/> <TextBlock Text="页" VerticalAlignment="Center"/> <Button Margin="5,0,0,0" Command="{x:Static Controls:Pager.GoToPageCommand}" CommandParameter="{Binding ElementName=tbox_Page,Path=Text}">确定</Button> </StackPanel> </StackPanel> </Border> </ControlTemplate> </Setter.Value> </Setter> </Style>
除了修改模板实现不同的形态的分页控件以外,还可以用图标替换掉“首页”、“上一页”、“下一页”、”尾页”等文字。
六.个性化控件外观
项目中的界面外观可能多种多样,有自己写的控件样式,也有使用第三方UI库的样式,如何跟它们搭配使用呢。
自定义控件样式
<Style TargetType="Button"> <Setter Property="Padding" Value="5"/> <Setter Property="Background" Value="Red"/> </Style> <Style TargetType="ToggleButton"> <Setter Property="Padding" Value="5"/> <Setter Property="Background" Value="Red"/> </Style>
使用第三方UI库
1.HandyControl
<ResourceDictionary> <ResourceDictionary.MergedDictionaries> <ResourceDictionary Source="pack://application:,,,/HandyControl;component/Themes/SkinDefault.xaml" /> <ResourceDictionary Source="pack://application:,,,/HandyControl;component/Themes/Theme.xaml" /> </ResourceDictionary.MergedDictionaries> </ResourceDictionary>
2.MaterialDesign
以上就是基于WPF开发一个分页控件的详细内容,更多关于WPF分页控件的资料请关注其它相关文章!
以上就是基于WPF开发一个分页控件的详细内容,更多关于WPF分页控件的资料请关注其它相关文章!