单选按钮 backColor 的 Winforms INotifyPropertyChanged

Question

有没有办法改变已经绑定到 ViewModel 属性的 RadioButton 的 BackColor？

基本上我使用的是 ViewModel 和 INotifyPropertyChanged，我想根据绑定到的 Bool 属性更改单选按钮的 BackColor。因此，如果 true 则将背景色设置为 Green 否则 default.

到目前为止，这是我的尝试，但显然行不通。我很确定我的双重绑定不正确？

public class ViewModel : INotifyPropertyChanged
{
        private bool _prop1;
        public bool Prop1 {
            get
            {
                return _prop1;
            }
            set
            {
               if (value == _prop1) return;
    
               _prop1= value;
               OnPropertyChanged(); 
               OnPropertyChanged(nameof(BackColor));               
            } 
        }

        private bool _prop2;
        public bool Prop2{ 
            get
            {
                return _prop2;
            }
            set
            {
                if (value == _prop2) return;
    
               _prop2= value;
               OnPropertyChanged(); 
               OnPropertyChanged(nameof(BackColor));   
            } 
        }

        public Color BackColor => Color.Green;

        public event PropertyChangedEventHandler PropertyChanged;

        [NotifyPropertyChangedInvocator]
        protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }
}

表格

public partial class Form1
{
    private ViewModel _viewModel;

    public Form1()
    {
        InitializeComponent();
        SetupBindings();
    }

    public void SetupBindings()
    {
        radioButton1.DataBindings.Add("Checked", _viewModel, nameof(_viewModel.Prop1), true);
        radioButton1.DataBindings.Add("BackColor", _viewModel, nameof(_viewModel.BackColor ), true, DataSourceUpdateMode.OnPropertyChanged);
        radioButton2.DataBindings.Add("Checked", _viewModel, nameof(_viewModel.Prop2), true);
        radioButton2.DataBindings.Add("BackColor", _viewModel, nameof(_viewModel.BackColor ), true, DataSourceUpdateMode.OnPropertyChanged);
    }
}

Answer 1

好的，我想我的问题已经解决了:)

因此为我的 ViewModel

中的每个单选按钮 BackColor 创建了两个单独的属性

private bool _prop1;
public bool Prop1 {
    get
    {
        return _prop1;
    }
    set
    {
        if (value == _prop1) return;
    
        _prop1= value;
        OnPropertyChanged(); 
        OnPropertyChanged(nameof(Radio1ButtonBackColor));               
    } 
}

private bool _prop2;
public bool Prop2{ 
    get
    {
       return _prop2;
    }
    set
    {
       if (value == _prop2) return;
    
       _prop2= value;
       OnPropertyChanged(); 
       OnPropertyChanged(nameof(Radio2ButtonBackColor));   
    } 
}
public Color Radio1ButtonBackColor => Prop1? Color.Green : default;
public Color Radio2ButtonBackColor => Prop2? Color.Green : default;

并将它们绑定到单选按钮 backColor 属性

public void SetupBindings()
{
     radioButton1.DataBindings.Add("Checked", _viewModel, nameof(_viewModel.Prop1), true);
     radioButton1.DataBindings.Add("BackColor", _viewModel, nameof(_viewModel.RadioButton1BackColor Radio1ButtonBackColor), true, DataSourceUpdateMode.OnPropertyChanged);
 
     radioButton2.DataBindings.Add("Checked", _viewModel, nameof(_viewModel.Prop2), true);
     radioButton2.DataBindings.Add("BackColor", _viewModel, nameof(_viewModel.RadioButton2BackColor), true, DataSourceUpdateMode.OnPropertyChanged);
}

单选按钮 backColor 的 Winforms INotifyPropertyChanged

Winforms INotifyPropertyChanged for radio button backColor

c#

data-binding

inotifypropertychanged

viewmodel

winforms