将ComboBox数据绑定到wpf中的ListView数据

Question

我正在尝试在列表视图中生成包含组合框的WPF模式。 组合框将动态生成并需要绑定。

XAML代码

<ListView Height="291" HorizontalAlignment="Left" Margin="12,196,0,0" Name="filterByList" VerticalAlignment="Top" Width="303" >
    <ListView.ItemTemplate>
        <DataTemplate>
            <StackPanel Orientation="Horizontal">
                <TextBlock Height="23" HorizontalAlignment="Left" Margin="0,50,34,0" Name="filterName" Text="{Binding DisplayName}" VerticalAlignment="Top" />
                <ComboBox Height="23" HorizontalAlignment="Right" Margin="0,50,34,0" Name="filterValues" VerticalAlignment="Top" Width="107" ItemsSource="{Binding RelativeSource={RelativeSource AncestorType=ListView}, Path=filterByValues}" IsEnabled="True" SelectedIndex="0" SelectedValuePath="filterByValues" DisplayMemberPath="filterByValues" />
             </StackPanel>
         </DataTemplate>
     </ListView.ItemTemplate>
</ListView>

代码隐藏

     List<Dimension> dimensionsData = new List<Dimension>();
            List<filterByValues> filterByValuesData = new List<filterByValues>();
            JArray filterByObject = JArray.Parse("[ { 'DisplayName': 'Fund', 'Values': [ 'FundA', 'FundB', 'FundC' ] }, { 'DisplayName': 'Sector', 'Values': [ 'SectorA', 'SectorB', 'SectorC' ] }, { 'DisplayName': 'Country', 'Values': [ 'CountryA', 'CountryB', 'CountryC' ] } ]");

            foreach (JObject value in filterByObject)
            {
                filterByValuesData = new List<filterByValues>();
                String JsonName = (String)value.GetValue("JsonName");
                String DisplayName = (String)value.GetValue("DisplayName");
                JArray Values = (JArray)value.GetValue("Values"); 
                foreach (var item in Values)
                {
                    filterByValuesData.Add(new filterByValues((string)item)); 
                }
                dimensionsData.Add(new Dimension { DisplayName = DisplayName, filterByValues = filterByValuesData }); 
            }
            filterByList.ItemsSource = dimensionsData;

 public class Dimension
    {
        public string DisplayName { get; set; }
        public List<filterByValues> filterByValues { get; set; }
    }

  public class filterByValues{
      public string filter{ get; set; }
      public filterByValues(String val) {
          filter = val;
      }
    }

生成的组合框为空。我是C＃和WPF的新手。

Answer 1

看起来问题出现在ComboBox

的绑定表达式中

<ComboBox Height="23" HorizontalAlignment="Right" Margin="0,50,34,0" Name="filterValues" VerticalAlignment="Top" Width="107" ItemsSource="{Binding RelativeSource={RelativeSource AncestorType=ListView}, Path=filterByValues}" IsEnabled="True" SelectedIndex="0" SelectedValuePath="filterByValues" DisplayMemberPath="filterByValues" />

您不需要在项目源中使用相对源绑定，DataTemplate将应用于正在呈现的所有项目。你可以尝试

<ComboBox Height="23" HorizontalAlignment="Right" Margin="0,50,34,0" Name="filterValues" VerticalAlignment="Top" Width="107" ItemsSource="{Binding filterByValues}" IsEnabled="True" SelectedIndex="0" SelectedValuePath="filter" DisplayMemberPath="filter" />

如果它仍然不起作用，请查看Visual Studio输出窗口，它会详细输出绑定错误。如果是这种情况，你可以在这里分享。