xamarin forms 從按鈕單擊捕獲列表視圖

Question

我下面的代碼顯示了一個列表視圖，當單擊“請播放您的訂單”按鈕時，function ButtonPressed(object sender, EventArgs e) 被擊中。 如何從 ButtonPressed function 捕獲整個列表視圖...

我試過類似的東西

    void ButtonPressed(object sender, EventArgs e)
        {
            var listView = (ListView)sender;//but this did not work
}





 <ContentPage.Content>
            <StackLayout>
                <ListView ItemsSource="{Binding CompletedList}" HasUnevenRows="True" SeparatorVisibility="None">
                    <ListView.Header>
                        <Button Text="Please place your order" Clicked="ButtonPressed"/>
                    </ListView.Header>
                    <ListView.Footer>
                    <Label x:Name="Items" HorizontalTextAlignment="End" VerticalTextAlignment="Start" Margin="20,20" FontAttributes="Bold"/>
                    </ListView.Footer>
                    <ListView.ItemTemplate>
                        <DataTemplate>
                            <ViewCell>
                                <Grid Padding="10" RowSpacing="10" ColumnSpacing="10">
                                    <Grid.RowDefinitions>
                                        <RowDefinition Height="Auto"/>
                                        <RowDefinition Height="*"/>
                                    </Grid.RowDefinitions>
                                    <Grid.ColumnDefinitions>
                                        <ColumnDefinition Width="Auto"/>
                                        <ColumnDefinition Width="*"/>
                                    </Grid.ColumnDefinitions>
                                    <Label Grid.Column="0" Text="{Binding I_D}" VerticalOptions="End" IsVisible="False"/>

                                    <Label Grid.Column="2" Grid.Row="1" Text="{Binding NameOfProduct}" VerticalOptions="End"/>                     
                                </Grid>
                            </ViewCell>
                        </DataTemplate>
                    </ListView.ItemTemplate>
                </ListView>
            </StackLayout>
        </ContentPage.Content>
    </ContentPage>

Answer 1

您的ListView綁定到CompletedList ，因此您實際上只需要訪問該變量，而不是ListView本身。