DataBinding/WPF C# 的通用可观察字典类 [英] General Observable Dictionary Class for DataBinding/WPF C#

问题描述

我正在尝试在 C# 中为 WPF 数据绑定创建一个 Observable 字典类.我在这里找到了 Andy 的一个很好的例子:双向数据在 WPF 中绑定字典

I'm trying to create a Observable Dictionary Class for WPF DataBinding in C#. I found a nice example from Andy here: Two Way Data Binding With a Dictionary in WPF

据此，我尝试将代码更改为以下内容:

According to that, I tried to change the code to following:

class ObservableDictionary : ViewModelBase
{
    public ObservableDictionary(Dictionary<TKey, TValue> dictionary)
    {
        _data = dictionary;
    }

    private Dictionary<TKey, TValue> _data;

    public Dictionary<TKey, TValue> Data
    {
        get { return this._data; }
    }

    private KeyValuePair<TKey, TValue>? _selectedKey = null;
    public KeyValuePair<TKey, TValue>? SelectedKey
    {
        get { return _selectedKey; }
        set
        {
            _selectedKey = value;
            RaisePropertyChanged("SelectedKey");
            RaisePropertyChanged("SelectedValue");
        }
    }

    public TValue SelectedValue
    {
        get
        {
            return _data[SelectedKey.Value.Key];
        }
        set
        {
            _data[SelectedKey.Value.Key] = value;
            RaisePropertyChanged("SelectedValue");
        }
    }
}

}

不幸的是，我仍然不知道如何传递通用"字典对象..有什么想法吗?

Unfortunately I still don't know how to pass "general" Dictionary Objects.. any ideas?

谢谢！

干杯

推荐答案

如果你真的想制作一个 ObservableDictionary，我建议你创建一个同时实现 IDictionary 的类> 和 INotifyCollectionChanged.您始终可以在内部使用 Dictionary 来实现 IDictionary 的方法，这样您就不必自己重新实现.

If you really want to make an ObservableDictionary, I'd suggest creating a class that implements both IDictionary and INotifyCollectionChanged. You can always use a Dictionary internally to implement the methods of IDictionary so that you won't have to reimplement that yourself.

由于您完全了解内部 Dictionary 何时发生变化，您可以使用这些知识来实现​​ INotifyCollectionChanged.

Since you have full knowledge of when the internal Dictionary changes, you can use that knowledge to implement INotifyCollectionChanged.

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