无法将枚举绑定到组合框 wpf mvvm
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Cant bind enum to combobox wpf mvvm
提问by Novikov
A have read a lot of method about the ways of binding enum to combobox. So now in .Net 4.5 it should be pretty ease. But my code dont work. Dont really understand why.
已经阅读了很多关于将枚举绑定到组合框的方法的方法。所以现在在 .Net 4.5 中应该很容易。但我的代码不起作用。真的不明白为什么。
xaml:
xml:
<Window x:Class="SmartTrader.Windows.SyncOfflineDataWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="SyncOfflineDataWindow" Height="300" Width="300">
<Grid>
<StackPanel>
<ComboBox ItemsSource="{Binding StrategyTypes}" SelectedItem="{Binding StrategyType}" />
<Button Width="150" Margin="5" Padding="5" Click="Button_Click">Save</Button>
</StackPanel>
</Grid>
xaml.cs backend
xaml.cs 后端
namespace SmartTrader.Windows
{
/// <summary>
/// Interaction logic for SyncOfflineDataWindow.xaml
/// </summary>
public partial class SyncOfflineDataWindow : Window
{
public SyncOfflineDataWindow(IPosition position, ContractType type)
{
DataContext = new ObservablePosition(position);
InitializeComponent();
}
private void Button_Click(object sender, RoutedEventArgs e)
{
}
}
}
View Model:
查看型号：
namespace SmartTrader.Entity
{
public class ObservablePosition : NotifyPropertyChanged, IPosition
{
public IEnumerable<StrategyType> StrategyTypes =
Enum.GetValues(typeof (StrategyType)).Cast<StrategyType>();
public ObservablePosition(IPosition position)
{
Strategy = position.Strategy;
}
private StrategyType _strategyType = StrategyType.None;
public StrategyType Strategy
{
get { return _strategyType; }
set
{
_strategyType = value;
OnPropertyChanged();
}
}
}
}
StrategyType is enum.
All i have got it is empty dropdown list
StrategyType 是枚举。我得到的只是空的下拉列表
回答by Mike Eason
You are trying to bind to a private variable, instead, your enum should be exposed as a Property.
您正试图绑定到一个私有变量，相反，您的枚举应该公开为Property.
public IEnumerable<StrategyTypes> StrategyTypes
{
get
{
return Enum.GetValues(typeof(StrategyType)).Cast<StrategyType>();
}
}
Also, Discosultan has already solved another problem for you.
此外，Discosultan 已经为您解决了另一个问题。
回答by Gaurav Panwar
Simplest way to bind any enum data to combobox in wpf XAML: Add data provider in window or user control resource
将任何枚举数据绑定到 wpf XAML 中的组合框的最简单方法：在窗口或用户控件资源中添加数据提供程序
xmlns:pro="clr-namespace:TestProject">
xmlns:pro="clr-namespace:TestProject">
<UserControl.Resources>
<ObjectDataProvider x:Key="getDataFromEnum" MethodName="GetValues" ObjectType="{x:Type System:Enum}">
<ObjectDataProvider.MethodParameters>
<x:Type TypeName="pro:YourEnumName"/>
</ObjectDataProvider.MethodParameters>
</ObjectDataProvider>
</UserControl.Resources>
<!--ComboBox xaml:-->
<ComboBox ItemsSource="{Binding Source={StaticResource getDataFromEnum}}"/>
