ListView Filtering trong Lập trình WPF

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace ListView_Filtering
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            List<User> items = new List<User>();
            items.Add(new User() { Name = "HowKteam", Age = 42 });
            items.Add(new User() { Name = "Kteam", Age = 39 });
            items.Add(new User() { Name = "Free Education", Age = 13 });
            items.Add(new User() { Name = "Share to be better", Age = 13 });
            lvUsers.ItemsSource = items;

            CollectionView view = (CollectionView)CollectionViewSource.GetDefaultView(lvUsers.ItemsSource);
            view.Filter = UserFilter;
        }

        private bool UserFilter(object item)
        {
            if (String.IsNullOrEmpty(txtFilter.Text))
                return true;
            else
                return ((item as User).Name.IndexOf(txtFilter.Text, StringComparison.OrdinalIgnoreCase) >= 0);
        }

        private void txtFilter_TextChanged(object sender, System.Windows.Controls.TextChangedEventArgs e)
        {
            CollectionViewSource.GetDefaultView(lvUsers.ItemsSource).Refresh();
        }
    }

    public enum SexType { Male, Female };

    public class User
    {
        public string Name { get; set; }

        public int Age { get; set; }

        public string Mail { get; set; }

        public SexType Sex { get; set; }
    }
}
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64

<Window x:Class="ListView_Filtering.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525">
    <DockPanel Margin="10">
        <TextBox DockPanel.Dock="Top" Margin="0,0,0,10" Name="txtFilter" TextChanged="txtFilter_TextChanged" />
        <ListView Name="lvUsers">
            <ListView.Resources>
                <Style TargetType="{x:Type GridViewColumnHeader}">
                    <Setter Property="HorizontalContentAlignment" Value="Center"></Setter>
                </Style>
            </ListView.Resources>
            <ListView.View>
                <GridView>
                    <GridViewColumn Header="Name" Width="120" >
                        <GridViewColumn.CellTemplate>
                            <DataTemplate>
                                <Grid Width="110">
                                    <TextBlock Text="{Binding Name}" HorizontalAlignment="Center"></TextBlock>
                                </Grid>
                            </DataTemplate>
                        </GridViewColumn.CellTemplate>
                    </GridViewColumn>
                    <GridViewColumn Header="Age" Width="50" DisplayMemberBinding="{Binding Age}" />
                </GridView>
            </ListView.View>
        </ListView>
    </DockPanel>
</Window>
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30