尝试将 Datatrigger 与枚举一起使用并获取枚举“..在命名空间中不存在”

Question

我正在使用 WPF 并尝试根据定义为枚举的属性更改我的图像源

xaml 如下所示：

<Window
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="clr-namespace:LogoCam;assembly="
    x:Class="LogoCam.MainWindow"
    Title="Logo Cam" Height="600" Width="600"
    Background="Gainsboro"
    SizeChanged="MainWindow_SizeChanged"
    WindowState="Maximized"
    MinHeight="600"
    MinWidth="600"
    Icon="Resources/millcam.ico"
    WindowStartupLocation="CenterScreen"
    Closed="MainWindow_Closed"
    >

我想根据枚举值更改图像

<Image x:Name="leftImage" Width="180" Height="42" MouseLeftButtonDown="Image_MouseLeftButtonDown">
    <Image.Style>
            <Style TargetType="{x:Type Image}">
                <Setter Property="Source" Value="Resources/Play.png" />
                <Style.Triggers>
                    <DataTrigger Value="{x:Static local:Modes.Playing}" Binding="{Binding Path=ActionMode}" >
                        <Setter Property="Source" Value="Resources/Stop.png"/>
                    </DataTrigger>
                    <DataTrigger Value="Modes.Stopped" Binding="{Binding Path=ActionMode}" >
                        <Setter Property="Source" Value="Resources/Play.png"/>
                    </DataTrigger>
                    <DataTrigger Value="Modes.SnapShot" Binding="{Binding Path=ActionMode}" >
                        <Setter Property="Source" Value="Resources/Back.png"/>
                    </DataTrigger>
                </Style.Triggers>
            </Style>
    </Image.Style>
 </Image>

查看我在 xaml 中尝试使用它时遇到的错误“名称“模式”不在命名空间 'clr-namespace:LogoCam;assembly=' 中存在：

Xaml.cs 看起来像这样

using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media.Imaging;
using System.ComponentModel;


namespace LogoCam
{

    public partial class MainWindow : System.Windows.Window, INotifyPropertyChanged
        {

            public enum Modes { Playing, Stopped, SnapShot };

            private Modes  mode = Modes.Stopped;

            public Modes ActionMode
            {
                private set
                {
                    mode = value;
                    OnPropertyChanged("ActionMode");
                }
                get
                {
                    return mode;
                }
            }

            public event PropertyChangedEventHandler PropertyChanged;

            public MainWindow()
            {
                InitializeComponent();
                this.DataContext = this;

            }

            private void OnPropertyChanged([System.Runtime.CompilerServices.CallerMemberName] string propertyName = null)
            {
                PropertyChangedEventHandler handler = PropertyChanged;
                if (handler != null) handler(this, new PropertyChangedEventArgs(propertyName));
            }
    }
}

为什么在 xaml 中找不到我的枚举？

感谢您的帮助。

Answer 1

它不在命名空间中，它在你的类中，因此：

{x:Static local:MainWindow+Modes.Playing}

我避免在类中定义枚举的原因之一。