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我想要获得自定义视图的自定义列表(我最终将添加控件到每个视图)使用数据绑定显示在一个xamarin项目。但是当我运行我的项目时,没有任何东西出现在列表中。我对数据绑定的东西很陌生,所以我有点困惑。我搜索并尝试了一些其他解决方案,但一直未能找出我的具体问题。任何帮助,将不胜感激。这是我的代码:ListView与自定义视图的数据绑定
<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
x:Class="XamarinTuts.XMainPage">
<ContentPage.Content>
<StackLayout>
<Label Text="Tasks:" HorizontalTextAlignment="Start" VerticalTextAlignment="Start" x:Name="tasksLabel"></Label>
<ListView ItemsSource="{Binding taskItems}">
<ListView.ItemTemplate>
<DataTemplate>
<Frame BackgroundColor="Black" Padding="5">
<Grid>
<StackLayout Name="TextStack" Orientation="Vertical" Grid.Column="0">
<Label Text="{Binding Name}"></Label>
<Label Text="{Binding Description}"></Label>
</StackLayout>
<StackLayout Name="ButtonStack" Orientation="Horizontal" HorizontalOptions="End" Grid.Column="1">
<Button Name="Edit" Text="Edit" Width="50" Height="50"></Button>
</StackLayout>
</Grid>
</Frame>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
</StackLayout>
</ContentPage.Content>
</ContentPage>
这是我的XAML。这里是我的XMainPage.cs:
public partial class XMainPage : ContentPage
{
TestViewModel vm;
public XMainPage()
{
InitializeComponent();
vm = new TestViewModel();
TaskListItem testItem = new TaskListItem(this, "Go shopping", "Drive to meijer and get the following: Milk, Eggs, Booze");
TaskListItem testItem2 = new TaskListItem(this, "Play Overwatch", "Pwn some n00bs");
vm.taskItems.Add(testItem);
vm.taskItems.Add(testItem2);
BindingContext = vm;
}
}
由我TestViewModel.cs如下:
public class TestViewModel : INotifyPropertyChanged
{
ObservableCollection<TaskListItem> mtaskItems;
public TestViewModel()
{
mtaskItems = new ObservableCollection<TaskListItem>();
}
public ObservableCollection<TaskListItem> taskItems
{
get
{
return mtaskItems;
}
set
{
mtaskItems = value;
}
}
public event PropertyChangedEventHandler PropertyChanged;
void OnPropertyChanged(string name = null)
{
var changed = PropertyChanged;
if (changed == null)
return;
changed.Invoke(this, new PropertyChangedEventArgs(name));
}
}
由我TaskListItem.cs如下:
public class TaskListItem : ViewCell
{
public Task newTask;
String mName;
String mDescription;
public String Name
{
get
{
return mName;
}
}
public String Description
{
get
{
return mDescription;
}
}
public TaskListItem(ContentPage taskListItemParent, String TaskName, String TaskDescription)
{
//newTask = new Task(TaskName, TaskDescription);
mName = TaskName;
mDescription = TaskDescription;
}
}
我已更新我的代码与您的建议,它仍然不适合我。它看起来像我已经正确设置,但没有显示在网页上。我还错过了什么吗? – Jremery1337
原来我有一些无效的XAML。摆弄一下后,我能够正确显示它。谢谢你的帮助! – Jremery1337
它很糟糕,在编译时无法找到这些错误。我很高兴这些信息是有帮助的 –