Question

我正在尝试列出sql数据库中的一些数据，但是当我向上（或向下）滚动列表时，数据混杂在一起，数据是固定的，但位置不同，如果我单击该项目，它将自动更改最重要的价值...

这是我的Interactions.xaml代码

<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
         xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
         x:Class="OficinaDigitalX.Views.Interactions"
         xmlns:local="clr-namespace:OficinaDigitalX">
<ContentPage.BindingContext>
    <local:ViewModel.CarInteractions/>
</ContentPage.BindingContext>
<ContentPage.Content>
    <StackLayout>
        <ListView ItemsSource="{Binding Path=InteractionsList, Mode=TwoWay}">
            <ListView.Header>
                <Grid>
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="110"/>
                        <ColumnDefinition Width="*"/>
                        <ColumnDefinition Width="50"/>
                    </Grid.ColumnDefinitions>
                    <Grid.RowDefinitions>
                        <RowDefinition Height="50" />
                    </Grid.RowDefinitions>
                    <Label Text="Fatura" FontSize="Medium" TextColor="Black" FontFamily="Bold" Grid.Column="0" Grid.Row="0" />
                    <Label Text="Intervenção" FontSize="Medium" TextColor="Black" Grid.Column="1" Grid.Row="0"/>
                    <Label Text="Total" FontSize="Medium" TextColor="Black" Grid.Column="2" Grid.Row="0"/>
                </Grid>
            </ListView.Header>
            <ListView.ItemTemplate>
                <DataTemplate>                       
                    <ViewCell>
                        <Grid>
                            <Grid.RowDefinitions>
                                <RowDefinition Height="200"/>
                            </Grid.RowDefinitions>
                            <Grid.ColumnDefinitions>
                                <ColumnDefinition Width="110"/>
                                <ColumnDefinition Width="*"/>
                                <ColumnDefinition Width="50"/>
                            </Grid.ColumnDefinitions>
                            <Label Grid.Column="0" Grid.Row="0" Text="{Binding Invoice}"
                            TextColor="#f35e20" FontSize="10"/>
                            <Label Grid.Column="1" Grid.Row="0" Text="{Binding Article}"
                            TextColor="#503026" FontSize="10" />
                            <Label Grid.Column="2" Grid.Row="0" Text="{Binding Total,StringFormat='{0} €'}"
                            TextColor="#503026" FontSize="10" />
                        </Grid>
                    </ViewCell>
                </DataTemplate>
            </ListView.ItemTemplate>
        </ListView>
    </StackLayout>
</ContentPage.Content>

这是我的Interactions.xaml.cs代码

[XamlCompilation(XamlCompilationOptions.Compile)]
public partial class Interactions : ContentPage
{
    public Interactions (CarInfo car)
    {
        InitializeComponent();
        BindingContext = new CarInteractions(car.VehicleId);
    }
    public Interactions()
    {

    }
}

}

CarInteractions（car.VehicleId）返回一个列表，该列表显示在listView上

这是我的CarInteractions.cs文件

public class CarInteractions : ViewModelBase
{

    private List<InteractionsInfo> _InteractionsList;

    public List<InteractionsInfo> InteractionsList
    {
        get
        {
            return _InteractionsList;
        }

        set
        {
            _InteractionsList = value;
            OnPropertyChanged("InteractionsList");
        }
    }

    public CarInteractions(int id)
    {
        GetFirstInteractionRow(id);
    }

    public CarInteractions() { }

   public void GetFirstInteractionRow(int id)
    {
        string command = "(**not important**)";
        string requestUriString = $"{MainPage.server}{command}/{id}";
        HttpWebRequest request = (HttpWebRequest)WebRequest.Create(requestUriString);
        HttpWebResponse response = null;

        try
        {
            response = (HttpWebResponse)request.GetResponse();
            using (var responseString = new StreamReader(response.GetResponseStream()))
            {
                InteractionsList = JsonConvert.DeserializeObject<ObservableCollection<InteractionsInfo>>(responseString.ReadToEnd());
            }
        }
        catch (WebException ex)
        {
            using (StreamReader reader = new StreamReader(ex.Response.GetResponseStream()))
            {

            }
            throw;
        }
    }


}

Answer 1

我遇到了最近发布的XF版本3.5的一些问题，建议您暂时将XF版本回滚到3.4，直到解决这些错误为止。

Answer 2

我也是，但是现在我更新到了新的FX，效果很好。

滚动时ListView内容混合在一起

2 个答案: