Question

此列表视图与我不合作。我试图显示一些服务时间。请看下面的截图 1.我得到了一份物品清单

在这些项目中，我需要时间列表

3.Xaml看起来像这样-注意=我尝试了{Binding Time}

 <ListView x:Name="HoursList" ItemsSource="{Binding PIEItems}"
                         CachingStrategy ="RecycleElement"
                         Grid.Row="2" 
                         Grid.ColumnSpan="3"
                         HasUnevenRows="True"
                         SeparatorVisibility="Default"
                         SeparatorColor="Navy">
                   <ListView.ItemTemplate>
                      <DataTemplate>
                          <ViewCell>
                            <Label Text="{Binding Times}"></Label>
                          </ViewCell>
                      </DataTemplate>
                   </ListView.ItemTemplate>
               </ListView>

3.View模型

ObservableCollection<DaysFormatting> _pieitems;
      public ObservableCollection<DaysFormatting> PIEItems
      {
         get
         {
            return _pieitems;
         }
         set
         {
            if (_pieitems != value)
            {
               _pieitems = value;
               PropertyChanged?.Invoke(
                   this,
                   new PropertyChangedEventArgs(nameof(PIEItems)));
            }
         }

      }

// on方法=>编辑

public void GetTimer()
      {
        if (a == c)
            {

               List<AvailableHrs> lsthrs = await data.GeteTimes(c, serviceId);
               ChosenDates.Time = new List<string>();
               foreach (var hr in lsthrs)
               {
                  ChosenDates.horas = hr.time;
                  Debug.WriteLine("to be ...." + ChosenDates.horas);
                  ChosenDates.Time.Add(hr.time);

                  Debug.WriteLine("to be in binding" + ChosenDates.Time);
               }

            }

            AvailableDates.Add(ChosenDates);

         }

         PIEItems = new ObservableCollection<DaysFormatting>(AvailableDates);
       }

Answer 1

由于您要尝试访问PIEItems内的属性Times，因此需要像这样绑定列表视图：

<ListView x:Name="HoursList" ItemsSource="{Binding PIEItems.Times}">

并访问其道具，如下所示：

 <ListView x:Name="HoursList" ItemsSource="{Binding PIEItems.Times}"
                     CachingStrategy ="RecycleElement"
                     Grid.Row="2" 
                     Grid.ColumnSpan="3"
                     HasUnevenRows="True"
                     SeparatorVisibility="Default"
                     SeparatorColor="Navy">
               <ListView.ItemTemplate>
                  <DataTemplate>
                      <ViewCell>
                        <Label Text="{Binding Capacity}"></Label>
                      </ViewCell>
                  </DataTemplate>
               </ListView.ItemTemplate>
           </ListView>

希望它对您有用：）

Answer 2

您绑定到错误的属性：

更改

<ListView x:Name="HoursList" BindingContext="'PIEItems"

到

<ListView x:Name="HoursList" ItemsSource="{Binding PIEItems}"

ListView Itemsource不显示对象Xamarin表单

2 个答案: