WPF ListView控件的SelectedItem为null [英] WPF ListView SelectedItem is null

问题描述

我有都有一个复选框作为一个列列表视图。如果我点击任何地方，但实际的复选框的ListView的的SelectedItem设置为当前选定行，符合市场预期。如果，另一方面，我点击到该复选框（不点击该行第一），那么的SelectedItem为空或previously点击一行。

谁能帮我......

干杯

 ＆LT; ListView的宽度=自动的SelectionMode =单X：NAME =列表框的ItemsSource ={结合迈德特}的SelectedItem ={绑定路径= SelectedMyData} ＆GT;
                        ＆LT; ListView.View＆GT;
                            ＆LT;＆GridView的GT;
                                ＆LT; GridViewColumn标题=日期WIDTH =120＆GT;
                                    ＆LT; GridViewColumn.CellTemplate＆GT;
                                        ＆LT;＆DataTemplate的GT;
                                            ＆lt;内容presenter风格={StaticResource的DateTimeContent}CONTENT ={结合数值指明MyDate}/＆GT;
                                        ＆LT; / DataTemplate中＆GT;
                                    ＆LT; /GridViewColumn.CellTemplate>
                                ＆LT; / GridViewColumn＆GT;
                                ＆LT; GridViewColumn标题=是正确的WIDTH =100＆GT;
                                    ＆LT; GridViewColumn.CellTemplate＆GT;
                                        ＆LT;＆DataTemplate的GT;
                                            ＆LT;复选框IsThreeState =FALSE
                                                      选中=OnChkChecked
                                                      未选中=OnChkChecked
                                                      =器isChecked{结合IsCorrect}＆GT;＆LT; /复选框＆GT;
                                        ＆LT; / DataTemplate中＆GT;
                                    ＆LT; /GridViewColumn.CellTemplate>
                                ＆LT; / GridViewColumn＆GT;
                            ＆LT; / GridView的＆GT;
                        ＆LT; /ListView.View>
                    ＆LT; /＆的ListView GT;
                                    ＆LT; GridViewColumn.CellTemplate＆GT;
                                        ＆LT;＆DataTemplate的GT;
                                            ＆LT;复选框IsThreeState =FALSE
                                                      选中=OnChkChecked
                                                      未选中=OnChkChecked
                                                      =器isChecked{结合IsCorrect}＆GT;＆LT; /复选框＆GT;
                                        ＆LT; / DataTemplate中＆GT;
                                    ＆LT; /GridViewColumn.CellTemplate>
                                ＆LT; / GridViewColumn＆GT;
                            ＆LT; / GridView的＆GT;
                        ＆LT; /ListView.View>
                    ＆LT; /＆的ListView GT;
 

解决方案

这很容易，只需处理你的复选框，点击事件：

 私人无效CheckBox_Click（对象发件人，RoutedEventArgs E）{
    变种CB =发件人为复选框;
    VAR项目= cb.DataContext;
    myListView.SelectedItem =项目;
}
 

I have a Listview that has a checkbox as one of the columns. If I click anywhere but the actual checkbox the SelectedItem of the ListView is set to the current selected row, as expected. If, on the other hand I click onto the checkbox (without clicking on the row first) then the SelectedItem is null or the previously clicked row.

Can anyone help me out....

Cheers

<ListView Width="auto" SelectionMode="Single" x:Name="listBox"  ItemsSource="{Binding MyData}" SelectedItem="{Binding Path=SelectedMyData}">
                        <ListView.View>
                            <GridView>
                                <GridViewColumn Header="Date" Width="120">
                                    <GridViewColumn.CellTemplate>
                                        <DataTemplate>
                                            <ContentPresenter Style="{StaticResource DateTimeContent}" Content="{Binding MyDate}"/>
                                        </DataTemplate>
                                    </GridViewColumn.CellTemplate>
                                </GridViewColumn>
                                <GridViewColumn Header="Is Correct" Width="100">
                                    <GridViewColumn.CellTemplate>
                                        <DataTemplate>
                                            <CheckBox IsThreeState="False" 
                                                      Checked="OnChkChecked"
                                                      Unchecked="OnChkChecked"
                                                      IsChecked="{Binding IsCorrect}"></CheckBox>
                                        </DataTemplate>
                                    </GridViewColumn.CellTemplate>
                                </GridViewColumn>
                            </GridView>
                        </ListView.View>
                    </ListView>




                                    <GridViewColumn.CellTemplate>
                                        <DataTemplate>
                                            <CheckBox IsThreeState="False" 
                                                      Checked="OnChkChecked"
                                                      Unchecked="OnChkChecked"
                                                      IsChecked="{Binding IsCorrect}"></CheckBox>
                                        </DataTemplate>
                                    </GridViewColumn.CellTemplate>
                                </GridViewColumn>
                            </GridView>
                        </ListView.View>
                    </ListView>

解决方案

It's very easy, just handle Click event on your checkbox:

private void CheckBox_Click(object sender, RoutedEventArgs e) {
    var cb = sender as CheckBox;
    var item = cb.DataContext;
    myListView.SelectedItem = item;
}

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