我有一个WPF Windows应用程序项目,它有一个带有两个ListBox控件的窗口,问题是如何将一个源绑定到这两个控件? 来源就像:
class student
{
public string name{get;set;}
public int age{get;set;}
}
ObservableCollection<student> m_myGroup;
我想:如果年龄> gt,ListBox1绑定到m_myGroup; 25 如果年龄<= 25,则ListBox2绑定到m_myGroup 显然,两个ListBox都有一个
TextBlock Text={binding Path=name}
并且我不想使用DataTrigger将项目可见性属性隐藏或显示,并且我尝试使用ICollectionView来过滤源,但它会影响其他ListBox! 有谁知道如何为每个ListBox制作两个过滤器,它们只绑定到一个源?
答案 0 :(得分:2)
为m_myGroup创建两个ICollectionView
,过滤它们并将它们绑定到ListBoxes
。
为此,将ListBox.IsSynchronizedWithCurrentItem
设置为false,选择时ListBoxes
之间不会有任何影响。
请参阅this。
修改强>
public class StudentHandler
{
ObservableCollection<student> m_myGroup;
public CollectionViewSource YoungStudentsViewSource { get; private set; }
public CollectionViewSource OldStudentsViewSource { get; private set; }
public StudentHandler
{
YoungStudentsViewSource = new CollectionViewSource {Source = m_myGroup};
OldStudentsViewSource = new CollectionViewSource {Source = m_myGroup};
YoungStudentsViewSource.Filter = (stud) => {return (stud as student).age<=25;};
OldStudentsViewSource .Filter = (stud) => {return (stud as student).age>25;};
}
}
此后将ViewSources
绑定到ListBoxes
答案 1 :(得分:0)
<Window x:Class="ComboboxStyle.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:converter="clr-namespace:ComboboxStyle"
Title="MainWindow" Height="350" Width="525">
<Window.Resources>
<converter:AgeConverter x:Key="ageConv"/>
</Window.Resources>
<Grid >
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<ListBox Grid.Column="0" DisplayMemberPath="Name" ItemsSource="{Binding Students, Converter={StaticResource ageConv}, ConverterParameter=agelessthan25}" >
</ListBox>
<ListBox Grid.Column="1" DisplayMemberPath="Name" ItemsSource="{Binding Students, Converter={StaticResource ageConv}, ConverterParameter=agegreaterthan25}" >
</ListBox>
</Grid>
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
Students = new ObservableCollection<Student>();
Students.Add(new Student() { Name = "Aeqwwe", Age = 24 });
Students.Add(new Student() { Name = "bqwewqeq", Age = 28 });
Students.Add(new Student() { Name = "cwqeqw", Age = 23 });
Students.Add(new Student() { Name = "dweqqw", Age = 29 });
Students.Add(new Student() { Name = "eqweweq", Age = 20 });
DataContext = this;
}
public ObservableCollection<Student> Students { get; set; }
}
public class Student
{
public string Name { get; set; }
public int Age { get; set; }
}
public class AgeConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
var items = value as ObservableCollection<Student>;
if (parameter != null && items != null)
{
if (parameter.ToString() == "agelessthan25")
{
return items.Where(i => i.Age < 25).ToList();
}
else if (parameter.ToString() == "agegreaterthan25")
{
return items.Where(i => i.Age >= 25).ToList();
}
}
return null;
}
public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
throw new NotImplementedException();
}
}
我希望这会有所帮助