WPF CommandParameter RelativeSource绑定 [英] WPF CommandParameter RelativeSource Binding

问题描述

我在ListView的DataTemple中有一个带CheckBox的ListView。向我展示了如何使Command正常工作。我想捕获ListView SelectedItem作为参数传递给Command，但是我不正确...

I have a ListView with a CheckBox inside of the ListView's DataTemple. I was shown how to make the Command work. I would like to capture the ListView SelectedItem to pass as a parameter to the Command, but I don't have it right...

<ListView x:Name="lvReferralSource" ItemsSource="{Binding ReferralObsCollection}" Style="{StaticResource TypeListViewStyle}">
                            <ListView.ItemTemplate>
                                <DataTemplate>
                                    <Grid Width="200">
                                        <Grid.ColumnDefinitions>
                                            <ColumnDefinition Width="*"/>
                                            <ColumnDefinition Width="Auto"/>
                                        </Grid.ColumnDefinitions>

                                        <CheckBox x:Name="ckbReferralIsChecked" Content="{Binding Value}" IsChecked="{Binding Active}" Style="{StaticResource CheckBoxStyleBase2}"
                                                  Command="{Binding DataContext.CheckBoxIsChecked, RelativeSource={RelativeSource AncestorType=ListView}}" 
                                                  CommandParameter="{Binding RelativeSource={RelativeSource AncestorType=ListView}, Path=SelectedItem}">
                                        </CheckBox>
                                    </Grid>
                                </DataTemplate>
                            </ListView.ItemTemplate>
                        </ListView>

推荐答案

再次查看问题，我认为我理解正确现在。
这是从 ListView
中获取 SelectedItem 的另一种方法，然后在 CheckBox 我将 CommandParameter 绑定如下

Looking at the problem again I think I understood it correctly now. Here is a different approach to get the SelectedItem from the ListView Then in the CheckBox I bound the CommandParameter as below

CommandParameter = {Binding ElementName = lvReferralSource，Path = SelectedItem}

以下将传递与<$相关的对象c $ c> CheckBox

CommandParameter = {Binding} // ListView中的完整对象

在 Command方法中与 CheckBox 可以将参数对象转换为正确的类型（ ListView ItemSource 中对象的类型），并获取 Value的值和活动

In the Command Method related to the CheckBox you can cast the parameter object to the correct type(type of the objects in the ListView ItemSource) and get the value of Value and Active

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