基于WPF實(shí)現(xiàn)步驟控件的示例代碼

更新時(shí)間：2023年01月11日 10:24:58 作者：驚鏵

這篇文章主要為大家詳細(xì)介紹了WPF實(shí)現(xiàn)簡單的步驟控件，文中的示例代碼講解詳細(xì)，對(duì)我們學(xué)習(xí)或工作有一定幫助，感興趣的小伙伴可以了解一下

WPF 實(shí)現(xiàn)步驟控件

框架使用.NET40；

Visual Studio 2019;

Step 繼承 ItemsControl 使用 Grid 嵌套 ProgressBar 和 ItemsPresenter.

ProgressBar 用來當(dāng)作步驟后面的線條，寬等于控件的(ActualWidth / Items.Count) * (Items.Count - 1),Maximum = Items.Count - 1。
ItemsPresenter 用來展示步驟 Item 。

ItemsPanel - ItemsPanelTemplate - UniformGrid Rows="1" 橫向展示，UniformGrid Columns="1" 可以控制豎向顯示，只不過需要重新自定義 ItemContainerStyle 的樣式。

然后創(chuàng)建 StepItem 繼承 ContentControl 增加兩個(gè)屬性 Index 用來記錄當(dāng)前是步驟與 State 記錄狀態(tài) (等待中、進(jìn)行中、已完成)。

因?yàn)槔^承了 ContentControl 所以可以在使用時(shí)指定 Content 顯示內(nèi)容，在每個(gè)步驟下方顯示。

實(shí)現(xiàn)代碼

1） Step.xaml 代碼如下：

<ResourceDictionary?xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
????????????????????xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
????????????????????xmlns:po="http://schemas.microsoft.com/winfx/2006/xaml/presentation/options"
????????????????????xmlns:controls="clr-namespace:WPFDevelopers.Controls"
????????????????????xmlns:converts="clr-namespace:WPFDevelopers.Converts">
????<ResourceDictionary.MergedDictionaries>
????????<ResourceDictionary?Source="Basic/ControlBasic.xaml"/>
????</ResourceDictionary.MergedDictionaries>

????<converts:IndexConverter?x:Key="IndexConverter"/>
????<Style?x:Key="DefaultStepItem"?TargetType="{x:Type?controls:StepItem}"
???????????BasedOn="{StaticResource?ControlBasicStyle}">
????????<Setter?Property="BorderThickness"?Value="1"/>
????????<Setter?Property="Template">
????????????<Setter.Value>
????????????????<ControlTemplate?TargetType="{x:Type?controls:StepItem}">
????????????????????<StackPanel>
????????????????????????<controls:SmallPanel>
????????????????????????????<Ellipse?
????????????????????????????????????Width="45"
????????????????????????????????????Height="30"
????????????????????????????????????Fill="{DynamicResource?WindowForegroundColorBrush}"
????????????????????????????????????HorizontalAlignment="Center"/>
????????????????????????????<Border?
????????????????????????????????????????Background="{TemplateBinding?Background}"
????????????????????????????????????????HorizontalAlignment="Center"
????????????????????????????????????????CornerRadius="15"
????????????????????????????????????????BorderThickness="{TemplateBinding?BorderThickness}"
????????????????????????????????????????BorderBrush="{TemplateBinding?BorderBrush}"
????????????????????????????????????????Height="30"?
????????????????????????????????????????Width="30">
????????????????????????????????<controls:SmallPanel>
????????????????????????????????????<TextBlock?Foreground="{TemplateBinding?Foreground}"?
???????????????????????????????????????????????????????VerticalAlignment="Center"
???????????????????????????????????????????????????????HorizontalAlignment="Center"
???????????????????????????????????????????????????????FontSize="{TemplateBinding?FontSize}"
???????????????????????????????????????????????????????Text="{Binding?RelativeSource={RelativeSource?FindAncestor,?AncestorType={x:Type?controls:StepItem}},?Converter={StaticResource?IndexConverter}}"
???????????????????????????????????????????????????????Name="PART_Index"/>
????????????????????????????????????<Path?Data="{StaticResource?PathComplete}"
??????????????????????????????????????????????????Fill="{TemplateBinding?Foreground}"
??????????????????????????????????????????????????Stretch="Uniform"
??????????????????????????????????????????????????Width="12"
??????????????????????????????????????????????????Height="12"
??????????????????????????????????????????????????Name="PART_PathComplete"
??????????????????????????????????????????????????Visibility="Collapsed"/>
????????????????????????????????</controls:SmallPanel>
????????????????????????????</Border>
????????????????????????</controls:SmallPanel>

????????????????????????<ContentPresenter?HorizontalAlignment="Center"?
??????????????????????????????????????????????????TextElement.FontWeight="Black"
??????????????????????????????????????????????????ContentTemplate="{Binding?ItemTemplate,RelativeSource={RelativeSource?AncestorType=controls:Step}}"
??????????????????????????????????????????????????TextElement.Foreground="{DynamicResource?RegularTextSolidColorBrush}"
??????????????????????????????????????????????????Margin="0,6,0,0"/>
????????????????????</StackPanel>
????????????????????<ControlTemplate.Triggers>
????????????????????????<Trigger?Property="Status"?Value="Waiting">
????????????????????????????<Setter?Property="Foreground"?Value="{DynamicResource?PrimaryTextSolidColorBrush}"/>
????????????????????????????<Setter?Property="Visibility"?TargetName="PART_PathComplete"?Value="Collapsed"/>
????????????????????????????<Setter?Property="Visibility"?TargetName="PART_Index"?Value="Visible"/>
????????????????????????????<Setter?Property="Background"?Value="{DynamicResource?BaseSolidColorBrush}"/>
????????????????????????</Trigger>
????????????????????????<Trigger?Property="Status"?Value="InProgress">
????????????????????????????<Setter?Property="Foreground"?Value="{DynamicResource?DefaultBackgroundSolidColorBrush}"/>
????????????????????????????<Setter?Property="Visibility"?TargetName="PART_PathComplete"?Value="Collapsed"/>
????????????????????????????<Setter?Property="Visibility"?TargetName="PART_Index"?Value="Visible"/>
????????????????????????????<Setter?Property="Background"?Value="{DynamicResource?PrimaryNormalSolidColorBrush}"/>
????????????????????????</Trigger>
????????????????????????<Trigger?Property="Status"?Value="Complete">
????????????????????????????<Setter?Property="BorderBrush"?Value="{DynamicResource?DefaultBackgroundSolidColorBrush}"/>
????????????????????????????<Setter?Property="Background"?Value="{DynamicResource?DefaultBackgroundSolidColorBrush}"/>
????????????????????????????<Setter?Property="Visibility"?TargetName="PART_PathComplete"?Value="Visible"/>
????????????????????????????<Setter?Property="Visibility"?TargetName="PART_Index"?Value="Collapsed"/>
????????????????????????????<Setter?Property="Foreground"?Value="{DynamicResource?PrimaryNormalSolidColorBrush}"/>
????????????????????????</Trigger>
????????????????????</ControlTemplate.Triggers>
????????????????</ControlTemplate>
????????????</Setter.Value>
????????</Setter>
????</Style>

????<Style?x:Key="DefaultStep"?TargetType="{x:Type?controls:Step}"?
???????????BasedOn="{StaticResource?ControlBasicStyle}">
????????<Setter?Property="ItemContainerStyle"?Value="{StaticResource?DefaultStepItem}"/>
????????<Setter?Property="VerticalContentAlignment"?Value="Top"/>
????????<Setter?Property="HorizontalContentAlignment"?Value="Center"/>
????????<Setter?Property="Template">
????????????<Setter.Value>
????????????????<ControlTemplate?TargetType="{x:Type?controls:Step}">
????????????????????<controls:SmallPanel>
????????????????????????<ProgressBar?x:Name="PART_ProgressBar"?
?????????????????????????????????????????????Margin="0,18"
?????????????????????????????????????????????Height="1"
?????????????????????????????????????????????Value="{Binding?StepIndex,RelativeSource={RelativeSource?AncestorType=controls:Step}}"
?????????????????????????????????????????????VerticalAlignment="{TemplateBinding?VerticalContentAlignment}"
?????????????????????????????????????????????HorizontalAlignment="{TemplateBinding?HorizontalContentAlignment}"/>
????????????????????????<ItemsPresenter/>
????????????????????</controls:SmallPanel>
????????????????</ControlTemplate>
????????????</Setter.Value>
????????</Setter>
????????<Setter?Property="ItemsPanel">
????????????<Setter.Value>
????????????????<ItemsPanelTemplate>
????????????????????<UniformGrid?Rows="1"/>
????????????????</ItemsPanelTemplate>
????????????</Setter.Value>
????????</Setter>
????</Style>

????<Style?TargetType="{x:Type?controls:StepItem}"?BasedOn="{StaticResource?DefaultStepItem}"?/>
????<Style?TargetType="{x:Type?controls:Step}"?BasedOn="{StaticResource?DefaultStep}"?/>
</ResourceDictionary>

2） Step.cs 代碼如下：

using?System;
using?System.Windows;
using?System.Windows.Controls;
using?System.Windows.Controls.Primitives;
using?System.Windows.Media;

namespace?WPFDevelopers.Controls
{
????[TemplatePart(Name?=?ProgressBarTemplateName,?Type?=?typeof(ProgressBar))]
????public?class?Step?:?ItemsControl
????{
????????private?const?string?ProgressBarTemplateName?=?"PART_ProgressBar";
????????private?ProgressBar?_progressBar;
????????public?int?StepIndex
????????{
????????????get?=>?(int)GetValue(StepIndexProperty);
????????????set?=>?SetValue(StepIndexProperty,?value);
????????}

????????public?static?readonly?DependencyProperty?StepIndexProperty?=?DependencyProperty.Register(
???????????"StepIndex",?typeof(int),?typeof(Step),?new?PropertyMetadata(0,?OnStepIndexChanged));

????????private?static?void?OnStepIndexChanged(DependencyObject?d,?DependencyPropertyChangedEventArgs?e)
????????{
????????????var?step?=?(Step)d;
????????????var?stepIndex?=?(int)e.NewValue;
????????????step.UpdateStepItemState(stepIndex);
????????}
????????void?UpdateStepItemState(int?stepIndex)
????????{
????????????var?count?=?Items.Count;
????????????if?(count?<=?0)?return;
????????????if?(stepIndex?>=?count)
????????????{
????????????????StepIndex--;
????????????????return;
????????????}
????????????if?(stepIndex?<?0)
????????????{
????????????????StepIndex++;
????????????????return;
????????????}
????????????for?(var?i?=?0;?i?<?stepIndex;?i++)
????????????{
????????????????if?(ItemContainerGenerator.ContainerFromIndex(i)?is?StepItem?stepItem)
????????????????????stepItem.Status?=?Status.Complete;
????????????}

????????????if?(ItemContainerGenerator.ContainerFromIndex(stepIndex)?is?StepItem?itemInProgress)
????????????????itemInProgress.Status?=?Status.InProgress;
????????????for?(var?i?=?stepIndex?+?1;?i?<?Items.Count;?i++)
????????????{
????????????????if?(ItemContainerGenerator.ContainerFromIndex(i)?is?StepItem?stepItem)
????????????????????stepItem.Status?=?Status.Waiting;
????????????}
????????}
????????public?override?void?OnApplyTemplate()
????????{
????????????base.OnApplyTemplate();
????????????_progressBar?=?GetTemplateChild(ProgressBarTemplateName)?as?ProgressBar;
????????}
????????protected?override?void?OnRender(DrawingContext?drawingContext)
????????{
????????????base.OnRender(drawingContext);
????????????var?count?=?Items.Count;
????????????if?(_progressBar?==?null?||?count?<=?0)?return;
????????????_progressBar.Maximum?=?count?-?1;
????????????_progressBar.Value?=?StepIndex;
????????????_progressBar.Width?=?(ActualWidth?/?count)?*?(count?-?1);


????????}
????????protected?override?bool?IsItemItsOwnContainerOverride(object?item)
????????{
????????????return?item?is?StepItem;
????????}
????????protected?override?DependencyObject?GetContainerForItemOverride()
????????{
????????????return?new?StepItem();
????????}
????????public?Step()
????????{
????????????ItemContainerGenerator.StatusChanged?+=?ItemContainerGenerator_StatusChanged;
????????}

????????public?void?Next()
????????{
????????????StepIndex++;
????????}
????????public?void?Previous()
????????{
????????????StepIndex--;
????????}
????????private?void?ItemContainerGenerator_StatusChanged(object?sender,?EventArgs?e)
????????{
????????????if?(ItemContainerGenerator.Status?==?GeneratorStatus.ContainersGenerated)
????????????{
????????????????var?count?=?Items.Count;
????????????????if?(count?<=?0)?return;
????????????????UpdateStepItemState(StepIndex);
????????????}
????????}
????}
}

3） StepItem.cs 代碼如下：

using?System.Windows;
using?System.Windows.Controls;

namespace?WPFDevelopers.Controls
{
????public?class?StepItem?:?ContentControl
????{

????????public?static?readonly?DependencyProperty?IndexProperty?=?DependencyProperty.Register(
????????????"Index",?typeof(int),?typeof(StepItem),?new?PropertyMetadata(-1));

????????public?int?Index
????????{
????????????get?=>?(int)GetValue(IndexProperty);
????????????internal?set?=>?SetValue(IndexProperty,?value);
????????}


????????public?static?readonly?DependencyProperty?StatusProperty?=?DependencyProperty.Register(
????????????"Status",?typeof(Status),?typeof(StepItem),?new?PropertyMetadata(Status.Waiting));


????????public?Status?Status
????????{
????????????get?=>?(Status)GetValue(StatusProperty);
????????????internal?set?=>?SetValue(StatusProperty,?value);
????????}
????}
}

4） Status.cs 代碼如下：

namespace?WPFDevelopers.Controls
{
????///?<summary>
????///狀態(tài)值
????///?</summary>
????public?enum?Status
????{
????????///?<summary>
????????///?等待中
????????///?</summary>
????????Waiting,
????????///?<summary>
????????///?正在進(jìn)行中
????????///?</summary>
????????InProgress,
????????///?<summary>
????????///?完成
????????///?</summary>
????????Complete
????}
}

5） StepExample.xaml 代碼如下：

<UserControl?x:Class="WPFDevelopers.Samples.ExampleViews.StepExample"
?????????????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:controls="clr-namespace:WPFDevelopers.Samples.Controls"
?????????????xmlns:wd="https://github.com/WPFDevelopersOrg/WPFDevelopers"
?????????????xmlns:local="clr-namespace:WPFDevelopers.Samples.ExampleViews"
?????????????mc:Ignorable="d"?
?????????????d:DesignHeight="450"?d:DesignWidth="800">
????<controls:CodeViewer>
????????<StackPanel??VerticalAlignment="Center"?>
????????????<UniformGrid?Columns="2"?Name="PART_UniformGrid">
????????????????<wd:Step?x:Name="PART_Step"?StepIndex="{Binding?Progress}">
????????????????????<wd:StepItem?Content="填寫賬號(hào)"/>
????????????????????<wd:StepItem?Content="身份驗(yàn)證"/>
????????????????????<wd:StepItem?Content="設(shè)置新密碼"/>
????????????????????<wd:StepItem?Content="完成"/>
????????????????</wd:Step>
????????????????<wd:Step?StepIndex="0"?ItemsSource="{Binding?Steps}">
????????????????</wd:Step>
????????????</UniformGrid>
????????????<StackPanel?Orientation="Horizontal"
????????????????????????VerticalAlignment="Center"?
????????????????????????HorizontalAlignment="Center"
????????????????????????Margin="10">
????????????????<Button?Content="上一步"??Command="{Binding?PreviousCommand}"?
????????????????????CommandParameter="{Binding?ElementName=PART_UniformGrid}"
????????????????????Style="{StaticResource?PrimaryButton}"/>
????????????????<Button?Content="下一步"???Command="{Binding?NextCommand}"?
????????????????????CommandParameter="{Binding?ElementName=PART_UniformGrid}"
????????????????????Style="{StaticResource?PrimaryButton}"/>
???????????????
????????????</StackPanel>
????????????
????????</StackPanel>
????????<controls:CodeViewer.SourceCodes>
????????????<controls:SourceCodeModel?
????????????????CodeSource="/WPFDevelopers.SamplesCode;component/ExampleViews/StepExample.xaml"?
????????????????CodeType="Xaml"/>
????????????<controls:SourceCodeModel?
????????????????CodeSource="/WPFDevelopers.SamplesCode;component/ExampleViews/StepExample.xaml.cs"?
????????????????CodeType="CSharp"/>
????????</controls:CodeViewer.SourceCodes>
????</controls:CodeViewer>
</UserControl>

6） StepExample.xaml.cs 代碼如下：

using?System;
using?System.Collections.ObjectModel;
using?System.Linq;
using?System.Windows.Controls;
using?System.Windows.Controls.Primitives;
using?System.Windows.Input;
using?WPFDevelopers.Controls;
using?WPFDevelopers.Samples.Helpers;

namespace?WPFDevelopers.Samples.ExampleViews
{
????///?<summary>
????///?StepExample.xaml?的交互邏輯
????///?</summary>
????public?partial?class?StepExample?:?UserControl
????{
????????public?ObservableCollection<string>?Steps
????????{
????????????get;
????????????set;
????????}
????????public?StepExample()
????????{
????????????InitializeComponent();
????????????Steps?=?new?ObservableCollection<string>();
????????????Steps.Add("Step?1");
????????????Steps.Add("Step?2");
????????????Steps.Add("Step?3");
????????????Steps.Add("Step?4");
????????????this.DataContext?=?this;
????????}
????????public?ICommand?NextCommand?=>?new?RelayCommand(new?Action<object>((sender)?=>
????????{
????????????var?uniformGrid?=?sender?as?UniformGrid;
????????????if?(uniformGrid?==?null)?return;
????????????foreach?(var?step?in?uniformGrid.Children.OfType<Step>())
????????????????step.Next();

????????}));
????????public?ICommand?PreviousCommand?=>?new?RelayCommand(new?Action<object>((sender)?=>
????????{
????????????var?uniformGrid?=?sender?as?UniformGrid;
????????????if?(uniformGrid?==?null)?return;
????????????foreach?(var?step?in?uniformGrid.Children.OfType<Step>())
????????????????step.Previous();
????????}));
????}
}

效果圖