【WPF】级联Combobox及其与ListView的联动
2024-06-23 02:38:10
一个射频标准支持多种带宽，多个频点，级联Combobox用两个Dictionary实现
ListView第一列时一个自定义控件，图片根据标准切换，Checkbox默认null，标准下的带宽和频点全部测试完毕后改为 true
采用了 MVVM框架，简单自定义一个Command
internal class RelayCommand : ICommand{public event EventHandler CanExecuteChanged;public Action action;public RelayCommand(Action action){this.action = action;}public bool CanExecute(object parameter){return true;}public void Execute(object parameter){action?.Invoke();}}internal class RelayCommand<T> : ICommand{public event EventHandler CanExecuteChanged;public Action<T> action;public RelayCommand(Action<T> action){this.action = action;}public bool CanExecute(object parameter){return true;}public void Execute(object parameter){action?.Invoke((T)parameter);}}Combobox实体。中心频点要做成Checkbox，就加了个IsChecked属性单独封装了
public class ComboboxSignal{public ComboboxSignal(string standard, List<string> bandWidthList, List<CenterFreq> centerFreqList){Standard = standard;BandWidthList = bandWidthList;CenterFreqList = centerFreqList;}public string Standard { get; set; }public List<string> BandWidthList { get; set; } = new List<string>();public List<CenterFreq> CenterFreqList { get; set; } = new List<CenterFreq>();}public class CenterFreq : INotifyPropertyChanged{public event Action<CenterFreq> CheckedChanged;public event PropertyChangedEventHandler PropertyChanged;public CenterFreq(string freq, bool isChecked){Freq = freq;IsChecked = isChecked;}private string freq = string.Empty;public string Freq { get { return freq; } set { freq = value; PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("Freq"));}}private bool isChecked = false;public bool IsChecked{get { return isChecked; }set{isChecked = value;PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("IsChecked"));if (isChecked){CheckedChanged?.Invoke(this);}}}}填充数据源，第一个频点默认选中
private static List<ComboboxSignal> m_signalList = new List<ComboboxSignal>();//信号列表/// <summary>/// 信号标准/// </summary>public List<string> StandardList { get; set; } = new List<string> { "802.11a/g", "802.11b", "802.11n", "802.11ac" };private void InitSignals(){List<CenterFreq> centerFreqList0 = new List<CenterFreq>();centerFreqList0.Add(new CenterFreq("36/5180M/Hz", true));centerFreqList0.Add(new CenterFreq("40/5200M/Hz", false));centerFreqList0.Add(new CenterFreq("44/5220M/Hz", false));List<CenterFreq> centerFreqList1 = new List<CenterFreq>();centerFreqList1.Add(new CenterFreq("1/2412M/Hz", true));centerFreqList1.Add(new CenterFreq("2/2417M/Hz", false));centerFreqList1.Add(new CenterFreq("3/2422M/Hz", false));List<CenterFreq> centerFreqList2 = new List<CenterFreq>();centerFreqList2.Add(new CenterFreq("36/5180M/Hz", true));centerFreqList2.Add(new CenterFreq("40/5200M/Hz", false));centerFreqList2.Add(new CenterFreq("44/5220M/Hz", false));List<CenterFreq> centerFreqList3 = new List<CenterFreq>();centerFreqList3.Add(new CenterFreq("1/2412M/Hz", true));centerFreqList3.Add(new CenterFreq("2/2417M/Hz", false));centerFreqList3.Add(new CenterFreq("3/2422M/Hz", false));m_signalList.Add(new ComboboxSignal(StandardList[0], new List<string> { "20M" }, centerFreqList0));m_signalList.Add(new ComboboxSignal(StandardList[1], new List<string> { "20M" }, centerFreqList1));m_signalList.Add(new ComboboxSignal(StandardList[2], new List<string> { "20M", "40M" }, centerFreqList2));m_signalList.Add(new ComboboxSignal(StandardList[3], new List<string> { "20M", "40M", "80M", "160M" }, centerFreqList3));CurrentSignal = m_signalList[0];ListViewSignalCollection.Add(new ListViewSignal(CurrentSignal));}前端绑定，下载Interactivity库，为Combobox提供命令支持
<Grid><StackPanel HorizontalAlignment="Left" Margin="50"><TextBlock Margin="0 10 0 0" Text="{DynamicResource txtLanguage}" FontSize="30" HorizontalAlignment="Center" VerticalAlignment="Center"/><TextBlock Margin="0 25 0 0" Text="{DynamicResource txtStandard}" FontSize="30" HorizontalAlignment="Center" VerticalAlignment="Center"/><TextBlock Margin="0 25 0 0" Text="{DynamicResource txtBandWidth}" FontSize="30" HorizontalAlignment="Center" VerticalAlignment="Center"/><TextBlock Margin="0 25 0 0" Text="{DynamicResource txtCenterFreq}" FontSize="30" HorizontalAlignment="Center" VerticalAlignment="Center"/></StackPanel><StackPanel HorizontalAlignment="Center" Margin="0 50 0 0"><ComboBox SelectedIndex="0" FontSize="20" Height="50" Width="200" Margin="0 0 0 10"><i:Interaction.Triggers><i:EventTrigger EventName="SelectionChanged" ><i:InvokeCommandAction Command="{Binding LanguageChangedCommand}"CommandParameter="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=ComboBox}}"/></i:EventTrigger></i:Interaction.Triggers><ComboBoxItem Content="{DynamicResource contChinese}"/><ComboBoxItem Content="{DynamicResource contEnglish}"/></ComboBox><ComboBox SelectedIndex="0" ItemsSource="{Binding StandardList}" Style="{StaticResource DefaultComboboxStyle}" FontSize="20" Height="50" Width="200" Margin="0 10 0 0" ><i:Interaction.Triggers><i:EventTrigger EventName="SelectionChanged" ><i:InvokeCommandAction Command="{Binding StandardChangedCommand}"CommandParameter="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=ComboBox}}"/></i:EventTrigger></i:Interaction.Triggers></ComboBox><ComboBox SelectedIndex="0" SelectedItem="{Binding DefaultBandWidth}" ItemsSource="{Binding CurrentSignal.BandWidthList}" Style="{StaticResource DefaultComboboxStyle}" FontSize="20" Height="50" Width="200" Margin="0 10 0 0"><i:Interaction.Triggers><i:EventTrigger EventName="SelectionChanged" ><i:InvokeCommandAction Command="{Binding BandWidthChangedCommand}"CommandParameter="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=ComboBox}}"/></i:EventTrigger></i:Interaction.Triggers></ComboBox><ComboBox SelectedIndex="0" SelectedItem="{Binding DefaultCenterFreq}" ItemsSource="{Binding CurrentSignal.CenterFreqList}" Style="{StaticResource CheckCombobox}" FontSize="20" Height="50" Margin="0 10 0 0" ><ComboBox.ItemTemplate><DataTemplate DataType="{x:Type model:CenterFreq}"><StackPanel Orientation="Horizontal"><CheckBox IsChecked="{Binding IsChecked}" /><TextBlock Text="{Binding Freq}" /></StackPanel></DataTemplate></ComboBox.ItemTemplate><!--<i:Interaction.Triggers><i:EventTrigger EventName="SelectionChanged" ><i:InvokeCommandAction Command="{Binding CenterFreqChangedCommand}"CommandParameter="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=ComboBox}}"/></i:EventTrigger></i:Interaction.Triggers>--></ComboBox></StackPanel></Grid>Combobox设置了SelectedIndex，但有时候切换标准会不生效，新增两个属性绑定到SelectedItem上，切换标准时更新属性值
private string defaultBandWidth;/// <summary>/// 默认带宽/// </summary>public string DefaultBandWidth{get { return defaultBandWidth; }set{defaultBandWidth = value;RaiseProertyChanged("DefaultBandWidth");}}private CenterFreq defaultCenterFreq;/// <summary>/// 默认频点/// </summary>public CenterFreq DefaultCenterFreq{get { return defaultCenterFreq; }set{defaultCenterFreq = value;RaiseProertyChanged("DefaultCenterFreq");}}ListView实体
public class ListViewSignal : INotifyPropertyChanged{public event PropertyChangedEventHandler PropertyChanged;private ComboboxSignal m_comboboxSignal = null;//当前选中信号public ListViewSignal(ComboboxSignal comboboxSignal){m_comboboxSignal = comboboxSignal;Standard = m_comboboxSignal.Standard;BandWidthTestedCollection.Add(m_comboboxSignal.BandWidthList[0]);CenterFreqTestedCollection.Add(m_comboboxSignal.CenterFreqList[0].Freq);}/// <summary>/// 带宽和频点全部测试完毕后修改 IsAllTested 属性/// </summary>public void OnCollectionChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e){if (BandWidthTestedCollection.Count == m_comboboxSignal.BandWidthList.Count &&CenterFreqTestedCollection.Count == m_comboboxSignal.CenterFreqList.Count){IsAllTested = true;}}#region Propertiesprivate string standard = "";/// <summary>/// 标准/// </summary>public string Standard{get { return standard; }set{standard = value;RaisePropertyChanged("Standard");}}private ObservableCollection<string> bandWidthTestedCollection = new ObservableCollection<string>();/// <summary>/// 已测带宽/// </summary>public ObservableCollection<string> BandWidthTestedCollection{get { return bandWidthTestedCollection; }set{bandWidthTestedCollection = value;RaisePropertyChanged("BandWidthTestedCollection");}}private ObservableCollection<string> centerFreqTestedCollection = new ObservableCollection<string>();/// <summary>/// 已测频点/// </summary>public ObservableCollection<string> CenterFreqTestedCollection{get { return centerFreqTestedCollection; }set{centerFreqTestedCollection = value;RaisePropertyChanged("CenterFreqTestedCollection");}}private bool isAllTested = false;/// <summary>/// 标准下的带宽和频点是否全部测完/// </summary>public bool IsAllTested{get { return isAllTested; }set{isAllTested = value;RaisePropertyChanged("isAllTested");}}#endregionprivate void RaisePropertyChanged(string propertyName){if (!string.IsNullOrEmpty(propertyName)){PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));}}}前端
<ListView Margin="0 30 0 0" ItemsSource="{Binding ListViewSignalCollection}"><ListView.View><GridView><GridViewColumn Header="射频标准" Width="100"><GridViewColumn.CellTemplate><DataTemplate><StackPanel><controls:SignalCheckedControl Standard="{Binding Standard}" IsAllTested="{Binding IsAllTested}" ImgPath="{Binding Standard}"/></StackPanel></DataTemplate></GridViewColumn.CellTemplate></GridViewColumn><GridViewColumn Header="已测带宽" Width="100"><GridViewColumn.CellTemplate><DataTemplate><ListBox ItemsSource="{Binding BandWidthTestedCollection}"></ListBox></DataTemplate></GridViewColumn.CellTemplate></GridViewColumn><GridViewColumn Header="已测频点" Width="150"><GridViewColumn.CellTemplate><DataTemplate><ListBox ItemsSource="{Binding CenterFreqTestedCollection}"/></DataTemplate></GridViewColumn.CellTemplate></GridViewColumn></GridView></ListView.View></ListView>自定义控件
<StackPanel Orientation="Horizontal" Background="White"><Image x:Name="img" Height="14" Width="14"/><CheckBox x:Name="checkbox" Grid.Column="1" IsThreeState="True" IsChecked="{x:Null}" Margin="5 0 5 0"/><TextBlock x:Name="textblock" Grid.Column="2" FontSize="10" Text="12345"/></StackPanel> public partial class SignalCheckedControl : UserControl{public SignalCheckedControl(){InitializeComponent();}/// <summary>/// 射频标准/// </summary>public string Standard{get { return (string)GetValue(StandardProperty); }set { SetValue(StandardProperty, value); }}public static readonly DependencyProperty StandardProperty =DependencyProperty.Register("Standard", typeof(string), typeof(SignalCheckedControl), new PropertyMetadata("", (d, e) =>{(d as SignalCheckedControl).textblock.Text = e.NewValue.ToString();}));/// <summary>/// 图片/// </summary>public string ImgPath{get { return (string)GetValue(ImgPathProperty); }set { SetValue(ImgPathProperty, value); }}// Using a DependencyProperty as the backing store for ImgPath. This enables animation, styling, binding, etc...public static readonly DependencyProperty ImgPathProperty =DependencyProperty.Register("ImgPath", typeof(string), typeof(SignalCheckedControl), new PropertyMetadata("", (d, e) =>{string uriStr = string.Format(@"\Resource\Images\{0}.jpg", e.NewValue.ToString().Replace("/", "").Trim());(d as SignalCheckedControl).img.Source = new BitmapImage(new Uri(uriStr, UriKind.Relative));}));/// <summary>/// 标准下支持的带宽和频点是否全部测试完/// </summary>public bool IsAllTested{get { return (bool)GetValue(IsAllTestedProperty); }set { SetValue(IsAllTestedProperty, value); }}public static readonly DependencyProperty IsAllTestedProperty =DependencyProperty.Register("IsAllTested", typeof(bool), typeof(SignalCheckedControl), new PropertyMetadata(false, (d, e) =>{var control = d as SignalCheckedControl;var isAll = e.NewValue is bool;if (isAll){control.checkbox.IsChecked = true;}else{control.checkbox.IsChecked = null;}}));}
}射频标准改变时更新级联Combobox数据源、默认值，Listview新增一条记录，但不重复新增
private ObservableCollection<ListViewSignal> listViewSignalList = new ObservableCollection<ListViewSignal>();public ObservableCollection<ListViewSignal> ListViewSignalCollection{get { return listViewSignalList; }set{listViewSignalList = value;RaiseProertyChanged("ListViewSignalList");}}public RelayCommand<ComboBox> StandardChangedCommand{get{return new RelayCommand<ComboBox>((cbb) =>{CurrentSignal = m_signalList.Find((s) => s.Standard == cbb.SelectedItem.ToString());DefaultBandWidth = CurrentSignal.BandWidthList[0];DefaultCenterFreq = CurrentSignal.CenterFreqList[0];var listViewSignal = ListViewSignalCollection.FirstOrDefault((s) => s.Standard == CurrentSignal.Standard);if (listViewSignal == null){ListViewSignalCollection.Add(new ListViewSignal(CurrentSignal));}});}}当前信号改变时为频点和已测项绑定变更通知事件（这个似乎也可以放在StandardChangedCommand里面做）
public ComboboxSignal CurrentSignal{get { return currentSignal; }set{currentSignal = value;RaiseProertyChanged("CurrentSignal");currentSignal.CenterFreqList.ForEach(t => t.CheckedChanged += (sender) =>{//更新listviewvar list = ListViewSignalCollection;var signal = ListViewSignalCollection.FirstOrDefault((s) => s.Standard == currentSignal.Standard);if (signal != null){if (signal.CenterFreqTestedCollection.IndexOf(sender.Freq) == -1){signal.CenterFreqTestedCollection.CollectionChanged -= signal.OnCollectionChanged;signal.CenterFreqTestedCollection.CollectionChanged += signal.OnCollectionChanged;signal.CenterFreqTestedCollection.Add(sender.Freq);}}}); }}带宽切换时更新已测带宽
/// <summary>/// 带宽切换命令/// </summary>public RelayCommand<ComboBox> BandWidthChangedCommand{get{return new RelayCommand<ComboBox>((cbb) =>{var listViewSignal = ListViewSignalCollection.FirstOrDefault((s) => s.Standard == CurrentSignal.Standard);if (listViewSignal != null && cbb.SelectedItem != null){var bandWidth = listViewSignal.BandWidthTestedCollection.FirstOrDefault((s) => s == cbb.SelectedItem.ToString());if (bandWidth == null){listViewSignal.BandWidthTestedCollection.CollectionChanged -= listViewSignal.OnCollectionChanged;listViewSignal.BandWidthTestedCollection.CollectionChanged += listViewSignal.OnCollectionChanged;listViewSignal.BandWidthTestedCollection.Add(cbb.SelectedItem.ToString());}}});}}完整ViewModel：
internal class MainViewModel : INotifyPropertyChanged{public event PropertyChangedEventHandler PropertyChanged;private List<ResourceDictionary> m_dictionaryList = new List<ResourceDictionary>(); //资源文件列表private static List<ComboboxSignal> m_signalList = new List<ComboboxSignal>();//信号列表public MainViewModel(){InitSignals();}/// <summary>/// 信号标准/// </summary>public List<string> StandardList { get; set; } = new List<string> { "802.11a/g", "802.11b", "802.11n", "802.11ac" };private ObservableCollection<ListViewSignal> listViewSignalList = new ObservableCollection<ListViewSignal>();public ObservableCollection<ListViewSignal> ListViewSignalCollection{get { return listViewSignalList; }set{listViewSignalList = value;RaiseProertyChanged("ListViewSignalList");}}private ComboboxSignal currentSignal;/// <summary>/// 当前信号/// </summary>public ComboboxSignal CurrentSignal{get { return currentSignal; }set{currentSignal = value;RaiseProertyChanged("CurrentSignal");currentSignal.CenterFreqList.ForEach(t => t.CheckedChanged += (sender) =>{//更新listviewvar list = ListViewSignalCollection;var signal = ListViewSignalCollection.FirstOrDefault((s) => s.Standard == currentSignal.Standard);if (signal != null){if (signal.CenterFreqTestedCollection.IndexOf(sender.Freq) == -1){signal.CenterFreqTestedCollection.CollectionChanged -= signal.OnCollectionChanged;signal.CenterFreqTestedCollection.CollectionChanged += signal.OnCollectionChanged;signal.CenterFreqTestedCollection.Add(sender.Freq);}}}); }}private string defaultBandWidth;/// <summary>/// 默认带宽/// </summary>public string DefaultBandWidth{get { return defaultBandWidth; }set{defaultBandWidth = value;RaiseProertyChanged("DefaultBandWidth");}}private CenterFreq defaultCenterFreq;/// <summary>/// 默认频点/// </summary>public CenterFreq DefaultCenterFreq{get { return defaultCenterFreq; }set{defaultCenterFreq = value;RaiseProertyChanged("DefaultCenterFreq");}}/// <summary>/// 语言切换命令/// </summary>public RelayCommand<ComboBox> LanguageChangedCommand{get{return new RelayCommand<ComboBox>((cbb) =>{var languageType = "";var selectItem = (cbb.SelectedItem as ComboBoxItem).Content;switch (selectItem.ToString()){case "中文":languageType = "zh-CN";break;case "英文":languageType = "en-US";break;case "Chinese":languageType = "zh-CN";break;case "English":languageType = "en-US";break;default:break;}//更换资源文件foreach (ResourceDictionary dictionary in Application.Current.Resources.MergedDictionaries){m_dictionaryList.Add(dictionary);}string requestedCulture = string.Format(@"Resource\{0}.xaml", languageType);ResourceDictionary resourceDictionary = m_dictionaryList.FirstOrDefault(d => d.Source.OriginalString.Equals(requestedCulture));if (resourceDictionary == null){requestedCulture = @"Resource\zh-CN.xaml";resourceDictionary = m_dictionaryList.FirstOrDefault(d => d.Source.OriginalString.Equals(requestedCulture));}if (resourceDictionary != null){Application.Current.Resources.MergedDictionaries.Remove(resourceDictionary);Application.Current.Resources.MergedDictionaries.Add(resourceDictionary);}});}}/// <summary>/// Standard切换命令/// </summary>public RelayCommand<ComboBox> StandardChangedCommand{get{return new RelayCommand<ComboBox>((cbb) =>{CurrentSignal = m_signalList.Find((s) => s.Standard == cbb.SelectedItem.ToString());DefaultBandWidth = CurrentSignal.BandWidthList[0];DefaultCenterFreq = CurrentSignal.CenterFreqList[0];var listViewSignal = ListViewSignalCollection.FirstOrDefault((s) => s.Standard == CurrentSignal.Standard);if (listViewSignal == null){ListViewSignalCollection.Add(new ListViewSignal(CurrentSignal));}});}}/// <summary>/// 带宽切换命令/// </summary>public RelayCommand<ComboBox> BandWidthChangedCommand{get{return new RelayCommand<ComboBox>((cbb) =>{var listViewSignal = ListViewSignalCollection.FirstOrDefault((s) => s.Standard == CurrentSignal.Standard);if (listViewSignal != null && cbb.SelectedItem != null){var bandWidth = listViewSignal.BandWidthTestedCollection.FirstOrDefault((s) => s == cbb.SelectedItem.ToString());if (bandWidth == null){listViewSignal.BandWidthTestedCollection.CollectionChanged -= listViewSignal.OnCollectionChanged;listViewSignal.BandWidthTestedCollection.CollectionChanged += listViewSignal.OnCollectionChanged;listViewSignal.BandWidthTestedCollection.Add(cbb.SelectedItem.ToString());}}});}}private void RaiseProertyChanged(string propertyName){if (string.IsNullOrEmpty(propertyName)) return;PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));}private void InitSignals(){List<CenterFreq> centerFreqList0 = new List<CenterFreq>();centerFreqList0.Add(new CenterFreq("36/5180M/Hz", true));centerFreqList0.Add(new CenterFreq("40/5200M/Hz", false));centerFreqList0.Add(new CenterFreq("44/5220M/Hz", false));List<CenterFreq> centerFreqList1 = new List<CenterFreq>();centerFreqList1.Add(new CenterFreq("1/2412M/Hz", true));centerFreqList1.Add(new CenterFreq("2/2417M/Hz", false));centerFreqList1.Add(new CenterFreq("3/2422M/Hz", false));List<CenterFreq> centerFreqList2 = new List<CenterFreq>();centerFreqList2.Add(new CenterFreq("36/5180M/Hz", true));centerFreqList2.Add(new CenterFreq("40/5200M/Hz", false));centerFreqList2.Add(new CenterFreq("44/5220M/Hz", false));List<CenterFreq> centerFreqList3 = new List<CenterFreq>();centerFreqList3.Add(new CenterFreq("1/2412M/Hz", true));centerFreqList3.Add(new CenterFreq("2/2417M/Hz", false));centerFreqList3.Add(new CenterFreq("3/2422M/Hz", false));m_signalList.Add(new ComboboxSignal(StandardList[0], new List<string> { "20M" }, centerFreqList0));m_signalList.Add(new ComboboxSignal(StandardList[1], new List<string> { "20M" }, centerFreqList1));m_signalList.Add(new ComboboxSignal(StandardList[2], new List<string> { "20M", "40M" }, centerFreqList2));m_signalList.Add(new ComboboxSignal(StandardList[3], new List<string> { "20M", "40M", "80M", "160M" }, centerFreqList3));CurrentSignal = m_signalList[0];ListViewSignalCollection.Add(new ListViewSignal(CurrentSignal));}}【WPF】级联Combobox及其与ListView的联动相关推荐
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