c# - 将字典绑定(bind)到组合框

Question

我正在尝试将字典绑定(bind)到组合框，但在 UI 上没有显示任何项目，仅绑定(bind)了空白项目。请找到下面的代码，让我知道我做错了什么？

代码:

private Dictionary<string, string> _timeToExpirationValues = 
new Dictionary<string, string>     { "< 15 Days", "15" },
                                   { "< 30 Days", "30" },
                                   { "< 60 Days", "60" },
                                   { "< 90 Days", "90" },
                                   { "< 1 year", "365" }};


        /// <summary>
        /// Gets or sets the filter settings data.
        /// </summary>
        /// <value>
        /// The filter settings data.
        /// </value>
        public Dictionary<string, string> TimeToExpirationValues
        {
            get { return _timeToExpirationValues; }
            set { SetProperty(ref _timeToExpirationValues, value); }
        }

XAML 代码:

 <ComboBox Grid.Row="1" Grid.Column="1" 
                                  ItemsSource="{Binding TimeToExpirationValues}"
                                  DisplayMemberPath="Key"
                                  SelectedValuePath="Value" />

显示内容如下:

Answer 1

这似乎是已知的错误。这里有一些链接供您引用。我试过 this Silverlight sample对于 Windows 应用商店应用程序，我也只得到没有文本的白色项目。

Binding a Dictionary to a WinRT ListBox

TargetException error in Binding - MSDN Forum

TargetException error in Binding to Dictionary<string, object> - Submitted Bug