在WPF中将ComboBox数据绑定到ListView数据

Question

I am trying to generate a WPF modal containing combo box inside List views. The combo-box will be generated dynamically and requires binding.

XAML Code

<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>

Code-Behind

     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;
      }
    }

The combo box generated is empty. I am very new to C# and WPF.

Answer 1

Looks like problem is in your binding expression for ComboBox

<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" />

You don't need a relative source binding in item source, the DataTemplate will be applied to all items being rendered. You can try

<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" />

If it still don't work, have a look on the Visual Studio output window, It outputs the binding error in details. You can share it here if that is the case.