C# listview的Datatemplate中的ComboBox无法正常工作

“Listview”的“DataTemplate”中的“ComboBox”无法正常工作

<ComboBox x:Name="colTopics"  Width="100" Height="30" SelectedValue="{Binding SELECTEDTOPICProperty}" Margin="31,333,317,10">
        <ComboBoxItem Content="eyteeee"/>
        <ComboBoxItem Content="eyteyte"/>
</ComboBox>

如果此“组合框”位于“ListView”的“DataTemplate”中，“SelectedValue”（是属性“SELECTEDTOPICProperty”）的绑定将给出“null”值。DataTemplate中的组合框是动态生成的

<ListView  x:Name="gridTopics" BorderThickness="2" ItemsSource="{Binding Path=TOPICSINFO}" HorizontalAlignment="Left" Margin="91,79,0,0" VerticalAlignment="Top" Height="242" Width="310" BorderBrush="#FF32A3D6"  >
        <ListView.Effect>
            <DropShadowEffect Color="#FF9ADDFB"/>
        </ListView.Effect>
        <ListView.View>
            <GridView >
                <GridView.Columns>
                    <GridViewColumn  x:Name="colPageNo" DisplayMemberBinding="{Binding PAGENO}" Width="50" Header="Pages" />
                    <GridViewColumn x:Name="colListTopics" Width="241" Header="Associated Topics" >
                        <GridViewColumn.CellTemplate>
                            <DataTemplate>
                                <ComboBox x:Name="colTopics"  Width="100" Height="30"  SelectedValue="{Binding SELECTEDTOPICProperty}" Margin="31,333,317,10">
                                <ComboBoxItem Content="eyteeee"/>
                                <ComboBoxItem Content="eyteyte"/>
                                </ComboBox>
                            </DataTemplate>
                        </GridViewColumn.CellTemplate>
                    </GridViewColumn>
                </GridView.Columns>
            </GridView>
        </ListView.View>
    </ListView>

如果“ComboBox”不在“ListView”中，它工作正常，并且在属性“SELECTEDTOPICProperty”中有选定值。

public class TopicsInfo
{
    public TopicsInfo()
    {
        listTopics = new List<string>();
    }

    private string pageNo;

    public string PAGENO
    {
        get { return pageNo; }
        set { pageNo = value; }
    }

    private List<string> listTopics;

    public List<string> LISTTOPICS
    {
        get { return listTopics; }
        set { listTopics = value; }
    }
    private string selectedTopicString;
    public string SELECTEDTOPICProperty
    {
        get { return selectedTopicString; }
        set
        {
            selectedTopicString = value;
        }
    }
}

公共类主题信息
{
公共主题信息（）
{
listTopics=新列表（）；
}
私有字符串pageNo；
公共字符串页码
{
获取{return pageNo；}
设置{pageNo=value；}
}
私人列表主题；
公共列表主题
{
获取{返回listTopics；}
设置{listTopics=value；}
}
私有字符串selectedTopicString；
公共字符串SELECTEDTOPICProperty
{
获取{return selectedTopicString；}
设置
{
selectedTopicString=值；
}
}
}

如果可能的话，他们会尝试像这样重新构造代码

你的财产类别

public class TopicsInfo
{
    private string pageNo;

    public string PAGENO
    {
        get { return pageNo; }
        set { pageNo = value; }
    }

    private string selectedTopicString;
    public string SELECTEDTOPICProperty
    {
        get { return selectedTopicString; }
        set
        {
            selectedTopicString = value;
        }
    }
}

要与ListView绑定的属性

private ObservableCollection<TopicsInfo> topicsInfoCollection = new ObservableCollection<TopicsInfo>();

        public ObservableCollection<TopicsInfo> TopicsInfoCollection
        {
            get
            {
                return this.topicsInfoCollection;
            }

            set
            {
                this.topicsInfoCollection = value;
            }
        }

private ObservableCollection topicsInfoCollection=new ObservableCollection（）；
公共可观测集合主题信息集合
{
收到
{
返回此.topicsInfoCollection；
}
设置
{
this.topicsInfoCollection=值；
}
}

还有你的XAML代码

<ListView  x:Name="gridTopics" BorderThickness="2" ItemsSource="{Binding Path=TopicsInfoCollection}" HorizontalAlignment="Left" Margin="91,79,0,0" VerticalAlignment="Top" Height="242" Width="310" BorderBrush="#FF32A3D6"  >
        <ListView.Effect>
            <DropShadowEffect Color="#FF9ADDFB"/>
        </ListView.Effect>
        <ListView.View>
            <GridView >
                <GridView.Columns>
                    <GridViewColumn  x:Name="colPageNo" DisplayMemberBinding="{Binding PAGENO}" Width="50" Header="Pages" />
                    <GridViewColumn x:Name="colListTopics" Width="241" Header="Associated Topics" >
                        <GridViewColumn.CellTemplate>
                            <DataTemplate>
                                <ComboBox x:Name="colTopics"  Width="100" Height="30"  SelectedValue="{Binding SELECTEDTOPICProperty}" Margin="31,333,317,10">
                                <ComboBoxItem Content="eyteeee"/>
                                <ComboBoxItem Content="eyteyte"/>
                                </ComboBox>
                            </DataTemplate>
                        </GridViewColumn.CellTemplate>
                    </GridViewColumn>
                </GridView.Columns>
            </GridView>
        </ListView.View>
    </ListView>

---

您能给我看一下“TOPICSINFO”和“SELECTEDTOPICProperty”的详细信息吗？“SELECTEDTOPICProperty”是“TOPICSINFO”的属性吗？感谢您的回复，原始问题中添加了代码。