C# - 将 IEnumerable 转换为 Dictionary<object,string>

Question

我正在构建一个 WPF UserControl .为此，我实现了一个 ItemSource DependecyProperty像这样:

private IEnumerable MisItems;
    public IEnumerable ItemsSource
    {
        get { return (IEnumerable)GetValue(ItemsSourceProperty); }
        set { SetValue(ItemsSourceProperty, value); }
    }

    public static readonly DependencyProperty ItemsSourceProperty =
        DependencyProperty.Register("ItemsSource", typeof(IEnumerable), typeof(TextBoxAutoComplete), new PropertyMetadata(new PropertyChangedCallback(OnItemsSourcePropertyChanged)));

    private static void OnItemsSourcePropertyChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
    {
        var control = sender as TextBoxAutoComplete;
        if (control != null)
            control.OnItemsSourceChanged((IEnumerable)e.OldValue, (IEnumerable)e.NewValue);
    }

    private void OnItemsSourceChanged(IEnumerable oldValue, IEnumerable newValue)
    {
        MisItems = newValue;
        // Remove handler for oldValue.CollectionChanged
        var oldValueINotifyCollectionChanged = oldValue as INotifyCollectionChanged;

        if (null != oldValueINotifyCollectionChanged)
        {
            oldValueINotifyCollectionChanged.CollectionChanged -= new NotifyCollectionChangedEventHandler(newValueINotifyCollectionChanged_CollectionChanged);
        }
        // Add handler for newValue.CollectionChanged (if possible)
        var newValueINotifyCollectionChanged = newValue as INotifyCollectionChanged;
        if (null != newValueINotifyCollectionChanged)
        {
            newValueINotifyCollectionChanged.CollectionChanged += new NotifyCollectionChangedEventHandler(newValueINotifyCollectionChanged_CollectionChanged);
        }

    }

    void newValueINotifyCollectionChanged_CollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
    {
        //Do your stuff here.
    }

ItemsSource属性由 IEnumerable 表示目的。现在我需要将它转换为 Dictionary<object,string > 在这个函数中:

protected SearchResult DoSearch(string searchTerm)
    {
        if (!string.IsNullOrEmpty(searchTerm))
        {
            SearchResult sr = new SearchResult();
            //var ItemsText = MisItems.GetType();
            var p = (List<string>)MisItems;

             /*sr.Results = ItemsText.Select((x, i) => new { x, i }).Where(x=>x.ToString().ToUpper().Contains(searchTerm.ToUpper()))
            .ToDictionary(a => (object)a.i, a => a.x);*/

            return sr;
        }
        else return new SearchResult();           
    }

我如何进行转换？

编辑 更多信息: 我的 View 模型具有此属性:

public List<EnumeradorWCFModel> Clientes { get; set; }

此属性的数据由 WCF service 返回:

Clientes = _svc.Clientes_Enum(sTicket, "");

然后我想要我的 UserControl绑定(bind)到这个属性。我这样创建我的控件:

<autocomplete:TextBoxAutoComplete x:Name="Clientes"  ItemsSource = "{Binding Path=Clientes}" DisplayMemberPath="Descripcion" Height="25"/>

Answer 1

[s]好的。您发布了很多代码(我个人认为对于您尝试做的事情来说是不必要的)。

让我们瘦下来。

你有一个 IEnumerable<string>开始，对吗？好。

有一个 ToDictionary() LINQ 库中的扩展方法。文档是 here .

所以你需要做的是:

IEnumerable<string> myEnumerableOfStrings = new List<string>();

Dictionary<object, string> dictionary = myEnumerableOfStrings.ToDictionary(value => (object) value);

And here's a Fiddle as an example.

好的，所以我们只有一个 IEnumerable没有强类型。 (首先，我曾经看到或听说过这样做，但应该适用相同的原则。)

我们需要创建一个本地字典并迭代该集合。

var myDictionary = new Dictionary<object, string>();
IEnumerable myCollection = new List<string>();

foreach(var item in myCollection)
{
    // This might be fun if you get two of the same object in the collection.
    // Since this key is based off of the results of the GetHashCode() object in the base object class.
    myDictionary.Add((object) item, item.ToString());
}

Here's an example of that.