WPF中向下拉框中绑定枚举体

1、枚举绑定combox的ItemsSource
ItemsSource绑定的是个集合值，要想枚举绑定ItemsSource，首先应该想到的是把枚举值变成集合。

方法一：使用资源里的ObjectDataProvider
如以下枚举

public enum PeopleEnum
{
中国人,
美国人,
英国人,
俄罗斯人
}
前端绑定：

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<Window x:Class="ComboxTest.MainWindow" 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:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:local="clr-namespace:ComboxTest" mc:Ignorable="d" Title="MainWindow" Height="200" Width="300"> <Window.Resources> <ObjectDataProvider x:Key="peopleEnum" MethodName="GetValues" ObjectType="{x:Type local:PeopleEnum}"> <ObjectDataProvider.MethodParameters> <x:Type Type="local:PeopleEnum"/> </ObjectDataProvider.MethodParameters> </ObjectDataProvider> </Window.Resources> <StackPanel> <ComboBox Margin="6" IsReadOnly="True" SelectedIndex="0" ItemsSource="{Binding Source={StaticResource peopleEnum}}" SelectedItem="{Binding People}"></ComboBox> <Button Margin="6" Click="show_People">显示选择项</Button> </StackPanel> </Window>

后端代码：

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public partial class MainWindow : Window,INotifyPropertyChanged { 　　　　#region 属性改变事件 public event PropertyChangedEventHandler PropertyChanged; protected void OnPropertyChanged(string propertyName) { if (PropertyChanged != null) { PropertyChanged(this, new PropertyChangedEventArgs(propertyName)); } } #endregion   private PeopleEnum people;   public PeopleEnum People { get => people; set { people = value; OnPropertyChanged("People"); } }   public MainWindow() { InitializeComponent(); this.DataContext = this; }   private void show_People(object sender, RoutedEventArgs e) { MessageBox.Show(People.ToString()); }}

方法二：使用EnumerationExtension

有时候公司对编码有要求，比如枚举不能用中文，中文需要写到Description里。

重写一下上面的例子：

public enum PeopleEnum
{
[Description("中国人")]
CHINESE,
[Description("美国人")]
AMERICAN,
[Description("英国人")]
ENGLISHMAN,
[Description("俄罗斯人")]
RUSSIAN
}
然后写个枚举拓展的类：

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public class EnumerationExtension : MarkupExtension { private Type _enumType;     public EnumerationExtension(Type enumType) { if (enumType == null) throw new ArgumentNullException("enumType");   EnumType = enumType; }   public Type EnumType { get { return _enumType; } private set { if (_enumType == value) return;   var enumType = Nullable.GetUnderlyingType(value) ?? value;   if (enumType.IsEnum == false) throw new ArgumentException("Type must be an Enum.");   _enumType = value; } }   public override object ProvideValue(IServiceProvider serviceProvider) { var enumValues = Enum.GetValues(EnumType);   return ( from object enumValue in enumValues select new EnumerationMember { Value = enumValue, Description = GetDescription(enumValue) }).ToArray(); }   private string GetDescription(object enumValue) { var descriptionAttribute = EnumType .GetField(enumValue.ToString()) .GetCustomAttributes(typeof(DescriptionAttribute), false) .FirstOrDefault() as DescriptionAttribute;     return descriptionAttribute != null ? descriptionAttribute.Description : enumValue.ToString(); }   public class EnumerationMember { public string Description { get; set; } public object Value { get; set; } } }

前端使用：

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<ComboBox Grid.Row="0" Grid.Column="1" Margin="3" MinHeight="28" ItemsSource="{Binding Source={local:Enumeration {x:Type local:PeopleEnum}}}" DisplayMemberPath="Description" SelectedValue="{Binding People}" SelectedValuePath="Value"> </ComboBox>

这样写代码会简洁很多。

2、布尔值绑定combox的ItemsSource

思路是先有个对应布尔值的枚举，然后用转换器进行转换。

public enum BoolEnum
{
是,
否
}

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public class BoolEnumConverter : IValueConverter { public object Convert(object value, Type targetType, object parameter, CultureInfo culture) { if ((bool)value == true) return BoolEnum.是; else return BoolEnum.否; }   public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) { if ((BoolEnum)value == BoolEnum.是) return true; else return false; } }

前端代码：

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<Window x:Class="ComboxTest.MainWindow" 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:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:local="clr-namespace:ComboxTest" mc:Ignorable="d" Title="MainWindow" Height="200" Width="300"> <Window.Resources> <ObjectDataProvider x:Key="boolEnum" MethodName="GetValues" ObjectType="{x:Type local:BoolEnum}"> <ObjectDataProvider.MethodParameters> <x:Type Type="local:BoolEnum"/> </ObjectDataProvider.MethodParameters> </ObjectDataProvider> <local:BoolEnumConverter x:Key="boolEnumConverter" /> </Window.Resources> <StackPanel> <ComboBox IsReadOnly="True" Margin="6" SelectedIndex="0" ItemsSource="{Binding Source={StaticResource boolEnum}}" SelectedItem="{Binding YesOrNo,Converter={StaticResource boolEnumConverter}}"></ComboBox> <Button Margin="6" Click="show_result">显示选择项</Button> </StackPanel> </Window>

　　

 

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public partial class MainWindow : Window,INotifyPropertyChanged { #region 属性改变事件 public event PropertyChangedEventHandler PropertyChanged; protected void OnPropertyChanged(string propertyName) { if (PropertyChanged != null) { PropertyChanged(this, new PropertyChangedEventArgs(propertyName)); } } #endregion   private bool yesOrNo=true;   public bool YesOrNo { get => yesOrNo; set { yesOrNo = value; OnPropertyChanged("YesOrNo"); } }   public MainWindow() { InitializeComponent(); this.DataContext = this; }   private void show_result(object sender, RoutedEventArgs e) { MessageBox.Show(YesOrNo.ToString()); } }

　　

原文链接：https://blog.csdn.net/niuge8905/article/details/112647213