Question

我为Listbox定制了ListBoxItem，它嵌套在数据网格中。但是，当我尝试遍历数据网格以查找列表框的控件时，但是当我尝试获取正在选择哪个单选按钮的值时，它失败了。

任何人都可以就任何方法或一些可能有用的解决方案片段提出建议吗？非常感谢。

<Page.Resources>
    <Style x:Key="RadioButtonItemStyle" TargetType="{x:Type ListBoxItem}">
        <Setter Property="Margin" Value="0,0,5,0" />
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type ListBoxItem}">
                    <Border BorderThickness="0" Background="Transparent">
                        <!-- Note: IsChecked is bound to IsSelected-->
                        <RadioButton 
                    Focusable="False" 
                    IsHitTestVisible="False" 
                    IsChecked="{TemplateBinding IsSelected}">
                            <ContentPresenter />
                        </RadioButton>
                    </Border>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
    <ItemsPanelTemplate x:Key="HorizontalItemsPanel">
        <VirtualizingStackPanel 
    Orientation="Horizontal" />
    </ItemsPanelTemplate>
</Page.Resources>
<Grid>
    <StackPanel>
        <StackPanel Orientation="Horizontal">
            <Label Name="GroupQuestionHeader" FontSize="14" FontWeight="Bold" FontFamily="Times New Roman" />
            <Label Name="PageCount" FontSize="10" FontFamily="Times New Roman"></Label>
        </StackPanel>

        <DataGrid AutoGenerateColumns="False" HorizontalAlignment="Left" Name="dataGrid1" VerticalAlignment="Top" CanUserReorderColumns="False" CanUserSortColumns="False" CanUserResizeColumns="False" CanUserAddRows="False">
            <DataGrid.CellStyle>
                <Style TargetType="DataGridCell">
                    <Setter Property="Padding" Value="5" />
                    <Setter Property="Template">
                        <Setter.Value>
                            <ControlTemplate TargetType="{x:Type DataGridCell}">
                                <Border Padding="{TemplateBinding Padding}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" SnapsToDevicePixels="True">
                                    <ContentPresenter SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                                </Border>
                            </ControlTemplate>
                        </Setter.Value>
                    </Setter>
                    <Style.Triggers>
                        <Trigger Property="IsSelected" Value="true">
                            <Setter Property="Background" Value="Transparent" />
                            <Setter Property="Foreground" Value="Black" />
                            <Setter Property="BorderBrush" Value="{x:Null}" />
                        </Trigger>
                    </Style.Triggers>
                </Style>
            </DataGrid.CellStyle>
            <DataGrid.Columns>
                <DataGridTemplateColumn Header="Question" Width="400">
                    <DataGridTemplateColumn.CellTemplate>
                        <DataTemplate>
                            <TextBlock TextWrapping="Wrap" Text="{Binding QuestionContent, Mode=OneWay}" />
                        </DataTemplate>
                    </DataGridTemplateColumn.CellTemplate>
                </DataGridTemplateColumn>
                <DataGridTemplateColumn Header="We fully Comply | We partly Comply | We do not Comply" Width="*">
                    <DataGridTemplateColumn.CellTemplate>
                        <DataTemplate>
                            <ListBox 
                            BorderThickness="0" 
                            SelectedValue="{Binding MyDataListSelectedValue}" 
                            ItemContainerStyle="{StaticResource RadioButtonItemStyle}" 
                            ItemsPanel="{StaticResource HorizontalItemsPanel}" Name="OptionsRadioButtonGroup" HorizontalContentAlignment="Left"
                                Cursor="Hand" HorizontalAlignment="Left">
                                <ListBoxItem Width="90"/>
                                <ListBoxItem Width="90"/>
                                <ListBoxItem/>
                            </ListBox>
                        </DataTemplate>
                    </DataGridTemplateColumn.CellTemplate>
                </DataGridTemplateColumn>
            </DataGrid.Columns>
        </DataGrid>
        <Button Content="Next Page" Height="23" HorizontalAlignment="Right" Name="button1" VerticalAlignment="Top" Width="75" Click="button1_Click" />
    </StackPanel>
</Grid>

我使用的方法

for (int i=0;i<dataGrid1.Items.Count;i++) 
{ 
    DataRowView datarowv = (DataRowView)dataGrid1.Items[i]; 
    DataRow dr = datarowv.Row; 
    string RBValue = dr.ItemArray[1].toString(); 
}

Answer 1

这个怎么样？我没有编译我直接从头脑中编写的代码。对不起，如果你遇到编译错误。只需修理它们。

for (int i=0;i<dataGrid1.Items.Count;i++) 
{

    // get control which represents the data
    var control = dataGrid1.ItemContainerGenerator.ContainerFromItem(dataGrid1.Items[i]);
    DependencyObject obj = control

    // inside that control there is somewhere the ListBox so run down the visualtree till you find the damn ListBox
    for(;!(obj is ListBox);
        obj = VisualTreeHelper.GetChild(obj, 0));

    ListBox listBox = obj as ListBox;
    if(listBox != null)
    {
      // get the selected values from ListBox
      var selectedItems = listBox.SelectedItems;
      foreach(var selectedItem in selecteditems)
      {
         Console.WriteLine("I am a selected item: " + selectedItem.ToString());
      }
    } 
}

如果您不明白这个小代码的作用，请问。

无法在Datagrid WPF中读取嵌套的自定义Listbox值

1 个答案: