我正在开发一个Xamarin表格应用程序,它有一个标签页。其中一个选项卡包含一个ListView
控件,显示Rest API所消耗的数据。如果我点击添加按钮模式显示我可以创建新项目并发送到Rest API的帖子。成功后,我会弹出导航模式,其中显示ListView
。在我的ListView
中,最后添加的项目未显示。Xamarin - 后刷新列表视图
我添加项目后,如何管理刷新调用Rest API的ListView
?
这是我的XAML页面:BonosView.xaml
<?xml version="1.0" encoding="UTF-8"?>
<ContentPage xmlns ="http://xamarin.com/schemas/2014/forms" xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:iconize="clr-namespace:FormsPlugin.Iconize;assembly=FormsPlugin.Iconize"
x:Class="rodriguez.BonosView" x:Name="BonosView"
Title="Bonos">
<ContentPage.Padding>
<OnPlatform x:TypeArguments="Thickness" iOS="0, 20, 0, 0" />
</ContentPage.Padding>
<ContentPage.Content>
<StackLayout>
<Label x:Name="BonosListMessage" IsVisible="false" HorizontalOptions="CenterAndExpand" VerticalOptions="CenterAndExpand" Text="No exixten bonos para mostrar"/>
<ListView x:Name="BonosList" ItemTapped="ViewDetails" RowHeight="70" >
<ListView.ItemTemplate>
<DataTemplate>
<ViewCell>
<Grid>
<Grid.Padding>
<OnPlatform x:TypeArguments="Thickness" iOS="10,5" Android="10,5"/>
</Grid.Padding>
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
<RowDefinition Height="*"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Label x:Name="monto" Text="{Binding Monto}" Style="{DynamicResource TitleListBono}" Grid.Row="0" Grid.ColumnSpan="2" LineBreakMode="NoWrap" HorizontalOptions="StartAndExpand"/>
<Label x:Name="nombre" Text="{Binding nombreCompleto}" FontSize="Small" FontAttributes="Bold" Grid.Row="1" Grid.Column="0" HorizontalOptions="StartAndExpand"/>
<Label x:Name="estado" Text="{Binding Estado}" FontSize="Small" Grid.Row="1" Grid.Column="1" HorizontalOptions="End" TextColor="Green"/>
<Label x:Name="montoRD" Text="{Binding MontoRD}" FontSize="Small" Grid.Row="2" Grid.Column="0" HorizontalOptions="StartAndExpand"/>
<Label x:Name="fecha" Text="{Binding fechaCompra, StringFormat='{0:dd-MMM-yyyy}'}" FontSize="Small" Grid.Row="2" Grid.Column="1" HorizontalOptions="End"/>
</Grid>
</ViewCell>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
</StackLayout>
</ContentPage.Content>
</ContentPage>
这里是我称之为填充列表:
async void refreshData()
{
this.IsBusy = true;
bonosLista = await manager.GetAll(); //obtaining bonos from Server
if (bonosLista != null)
{
if (bonosLista.Count() > 0)
{
BonosList.ItemsSource = bonosLista;
}
else
{
BonosList.IsVisible = false;
BonosListMessage.IsVisible = true;
}
}
else
{
await DisplayAlert("Error!", "Se ha producido un error en la conexión", "OK");
}
this.IsBusy = false;
}
我想调用后,该方法莫代尔流行音乐。
我会在Post完成后使用MessagingCenter发送消息,然后告诉LIstView刷新它的数据 – Jason
如果您在模型中为BonosList.ItemsSource定义绑定为ObservableCollection,那么bonosLista然后列表应该更新 –
它会在我按下名单@YuriS –