ListView Itemsource不显示对象Xamarin表单 [英] ListView Itemsource not showing object Xamarin Forms

问题描述

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

This list view is just not cooperating with me. I'm trying to display some hours that comes from service. Please see the following screenshot 1. I got a list of Items

1. 在这些项目中，我需要时间列表

1. Inside those Items, I need Time list

3.Xaml看起来像这样-注意=我尝试了{Binding Time}

3.Xaml looks like this - Note = I tried {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);
       }

推荐答案

由于您试图访问PIEItems内部的Times属性，因此需要像这样绑定列表视图:

since you're trying to access the property Times inside PIEItems, you need to bind your list view like this:

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

并访问其道具，如下所示:

And access to its props like this:

 <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:)

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