Question

List<MyItem> Reports = new List<MyItem>();

public class MyItem
    {
        public int CountAnswers{ get; set; }
        public DateTime DateTimeStartTime { get; set; }
    }

我使用ListBox

在Binding中显示它

<ListBox Name="QuestionList" ItemsSource="{Binding Reports}">
    <ListBox.ItemTemplate>
        <DataTemplate >            
             <TextBlock Text="{Binding CountAnswers}"/>                      
        </DataTemplate>
    </ListBox.ItemTemplate>
</ListBox>

我想只显示CountAnswers大于0的项目。我有100件商品，但只有少数商品有CountAnswers＆gt; 0

Answer 1

然后使用LINQ ...

public IEnumerable<MyItem> ReportsWithAnwers
{
    get
    {
       return Reports.Where(x => x.CountAnswers > 0);
    }
}

<ListBox Name="QuestionList" ItemsSource="{Binding ReportsWithAnwers}">
    <ListBox.ItemTemplate>
        <DataTemplate >            
             <TextBlock Text="{Binding CountAnswers}"/>                      
        </DataTemplate>
    </ListBox.ItemTemplate>
</ListBox>

与列表项绑定的可见性

1 个答案: