UWP 双向绑定,在ListView中有个TextBox,怎么获取Text的值

要求:评论宝贝的时候一个订单里面包含多个产品,获取对产品的评论内容哦

1. xaml界面

 <ListView x:Name="lvDetail">
                     <ListView.ItemTemplate>
                            <DataTemplate>
                                <StackPanel>
                                    <RelativePanel Padding="10,0,0,0">
                                        <Image x:Name="imgoods" Height="75" Width="75" Source="{Binding GoodsPicture}" />
                                        <TextBlock x:Name="tbName" Text="{Binding GoodsName}"  FontSize="16" RelativePanel.RightOf="imgoods" Margin="10,0,0,0"  />
                                        <TextBlock x:Name="tbColor" Text="{Binding SpecValue}"  Foreground="#C5C5C5" RelativePanel.Below="tbName" RelativePanel.RightOf="imgoods" Margin="8,5,0,0"/>
                                        <TextBlock x:Name="tbUnitPrice"   RelativePanel.AlignRightWithPanel="True" Margin="0,0,10,0">
                                     <Run Text="￥" Foreground="Red"/>
                                     <Run  Text="{Binding UnitPrice}" FontSize="16" Foreground="Red"/>
                                        </TextBlock>
                                        <TextBlock   RelativePanel.AlignRightWithPanel="True" RelativePanel.AlignVerticalCenterWithPanel="True"  Margin="0,0,10,0">
                                   <Run Text="x"/>
                                   <Run Text="{Binding Quantity}" />
                                        </TextBlock>
                                    </RelativePanel>
                                    <!-- 评价内容-->
                                    <Grid Margin="10" BorderBrush="Gray" BorderThickness="1" CornerRadius="2">
                                        <TextBox x:Name="tbContent" Text="{Binding Path=Content, Mode=TwoWay}" BorderBrush="Transparent" TextWrapping="Wrap" Height="100" PlaceholderText="亲,写点什么吧,您的意见对其他买家提供很多帮助"/>
                                    </Grid>
                                </StackPanel>
                            </DataTemplate>
                        </ListView.ItemTemplate>
                    </ListView>

要求:获取ListView中x:Name为tbContent的值(评论内容)

第一步:绑定TextBox的值使用Mode=TwoWay

<TextBox x:Name="tbContent" Text="{Binding Path=Content, Mode=TwoWay}" BorderBrush="Transparent" TextWrapping="Wrap" Height="100" PlaceholderText="亲,写点什么吧,您的意见对其他买家提供很多帮助"/>

第二步:GoodsList集合的实体(也就是评论内容所在的实体模型)要实现INotifyPropertyChanged接口

  public class Goods : INotifyPropertyChanged
    {
       private string content;
        /// <summary>
        /// 内容(评价宝贝使用)
        /// </summary>
        public string Content
        {
            get
            {
                return content;
            }
            set
            {
                content = value;
                if (this.PropertyChanged != null)
                {
                    this.PropertyChanged.Invoke(this, new PropertyChangedEventArgs("Content"));
                }
            }
        }
        public event PropertyChangedEventHandler PropertyChanged;
    }

第三步:绑定数据源       

private ObservableCollection<Goods> GoodsList = new ObservableCollection<Goods>();//商品列表

lvDetail.ItemsSource = respOrder.OrderDetail.GoodsList;

GoodsList = respOrder.OrderDetail.GoodsList;

 

第四步:点击提交获取值

       在界面写评论内容会自动在数据源绑定的GoodsList中的Content属性中