绑定到随组合框索引变化的数组元素

Question

class DAC : INotifyPropertyChanged
{
    private uint _value;
    private bool _isCurrent;
    private string _name;
    private uint _address;
    private bool _powerDown;
    private bool _lowPower;
    private bool _enable;

    public bool Enable
    {
        get { return _enable; }
        set 
        {
            if (_enable == value)
            {
                return;
            }
            _enable = value;
            OnPropertyChanged("Enable");
        }
    }

    //The rest of the property definitions looks like the first one

    public uint Value
    {
        get { return _value; }
        set 
        {
            if (_value == value)
            {
                return;
            }
            _value = value;
            OnPropertyChanged("Value");
        }
    }

    #region INotifyProperty Definitions
    public event PropertyChangedEventHandler PropertyChanged;

    protected void OnPropertyChanged(string propertyName)
    {
        if (PropertyChanged != null)
        {
            PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
        }
    } 
    #endregion
}

所以这是我的基本 class，我打算用它来填充列表。我基本上有一个列在组合框中的 DAC 数组（或 DAC 的其他衍生产品）。组合框用

填充自身

combobox1.SetBinding(ComboBox.ItemsSourceProperty, new Binding() { Source = cdacList });
combobox1.DisplayMemberPath = "Name";

当用户选择其中一项时，应该根据从组合框中选择的索引更新文本框和滑块的值，并使用该索引访问数组中的数据。

我试过直接绑定

textbox1.SetBinding(TextBox.TextProperty, new Binding("Address") { Source = cdacList[combobox1.SelectedIndex] });
slider1.SetBinding(Slider.ValueProperty, new Binding("Value") { Source = cdacList[combobox1.SelectedIndex] });

但它不会自行更新。我知道我需要一些其他方面来通过绑定来做到这一点，但我自己想不通。

Answer 1

您应该能够如下所示设置一次绑定，以后无需更改它们：

textbox1.SetBinding(TextBox.TextProperty,
    new Binding("SelectedItem.Address") { Source = combobox1 });
slider1.SetBinding(Slider.ValueProperty,
    new Binding("SelectedItem.Value") { Source = combobox1 });

也就是说，应该在 XAML:

中创建绑定

<TextBox x:Name="textbox1"
    Text="{Binding SelectedItem.Address, ElementName=combobox1}" .../>
<Sliderx:Name="slider1"
    Text="{Binding SelectedItem.Value, ElementName=combobox1}" .../>

绑定到随组合框索引变化的数组元素

Binding to an array's element changing with combobox index

c#

data-binding

indexing

wpf

combobox