基于领域模型的边框颜色？

发布于 2024-12-10 10:15:39 字数 521 浏览 1 评论 0原文

我的域模型中有一个 poco 类：

public class Slot
{
    bool HasPlayed { get; set; }
}

并且我将其显示在列表框项模板中。

<Border Background="...">
    <CheckBox IsChecked="{Binding Path=HasPlayed, Mode=TwoWay}" />
</Border>

但我想做的是，当 HasPlayed 为 true 时，边框的背景颜色变为红色，当为 false 时，边框的背景颜色变为绿色。这些画笔位于资源字典中。

我可以向域模型添加 Brush，但这会破坏关注点的分离。我将来也不会使用该复选框，这只是一个模拟 UI。

我尝试过 IValueConverter，但当属性更改时它不会更改。该模型确实实现了 INotifyPropertyChanged。

当属性改变时你会如何改变颜色？

原文

I have a poco class in my domain model:

public class Slot
{
    bool HasPlayed { get; set; }
}

And I am displaying it in a listbox item template.

<Border Background="...">
    <CheckBox IsChecked="{Binding Path=HasPlayed, Mode=TwoWay}" />
</Border>

But what I want to do is when the HasPlayed is true, the background color of the border turns red, and when false it's green. These brushes are in a resource dictionary.

I could add a Brush to the domain model, but that defeats the seperation of concerns. I also am NOT going to use the checkbox in the future, this is just a mock up UI.

I've tried a IValueConverter, but it doesn't change when the property changes. The model does implement INotifyPropertyChanged.

How would you change the color when the property changes?

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同尘 2024-12-17 10:15:39

您可以使用 DataTrigger 来触发操作：

http://en.csharp-online .net/WPF_Styles_and_Control_Templates%E2%80%94Data_Triggers

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夢归不見 2024-12-17 10:15:39

我猜属性更改没有被拾取，因为 Slot 没有实现 INotifyPropertyChanged。

尝试这样的事情：

public class Slot : INotifyPropertyChanged
    {
        private bool _hasPlayed;

        private bool HasPlayed
        {
            get { return _hasPlayed; }
            set
            {
                _hasPlayed = value;
                InvokePropertyChanged(new PropertyChangedEventArgs("HasPlayed"));
            }
        }

        #region INotifyPropertyChanged Members

        public event PropertyChangedEventHandler PropertyChanged;

        #endregion

        public void InvokePropertyChanged(PropertyChangedEventArgs e)
        {
            PropertyChangedEventHandler handler = PropertyChanged;
            if (handler != null)
            {
                handler(this, e);
            }
        }
    }

I'm guessing the property change isn't being picked up because Slot doesn't implement INotifyPropertyChanged.

Try something like this:

public class Slot : INotifyPropertyChanged
    {
        private bool _hasPlayed;

        private bool HasPlayed
        {
            get { return _hasPlayed; }
            set
            {
                _hasPlayed = value;
                InvokePropertyChanged(new PropertyChangedEventArgs("HasPlayed"));
            }
        }

        #region INotifyPropertyChanged Members

        public event PropertyChangedEventHandler PropertyChanged;

        #endregion

        public void InvokePropertyChanged(PropertyChangedEventArgs e)
        {
            PropertyChangedEventHandler handler = PropertyChanged;
            if (handler != null)
            {
                handler(this, e);
            }
        }
    }

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