WPF: Binding to LINQ data

Bài viết này trình bày cách binding to LINQ data trong WPF.

Chúng ta có một class sử dụng LINQ như sau:

namespace LINQBinding

{

    public class Person

    {

        public string FullName { get; set; }

        public string Department { get; set; }

        public Person(string fullName, string department)

        {

            FullName = fullName;

            Department = department;

        }

    }

    public class People : List<Person> { }

    public class Hyperlogy

    {

        People people = new People         

        { 

        new Person("Duc Le", "Java"),

        new Person("Quang Nguyen", ".Net"),

        new Person("Huy Tran", "Java"),

        new Person("Nhat Mai", ".Net"),

        new Person("Nam Do", "Java"),

        };

        public IEnumerable<string> MicrosoftTeam

        {

            get

            {

                return from person in people

                       where person.Department == ".Net"

                       select person.FullName;

            }

        }

    }

}

Chúng ta có thể binding LINQ data trong MicrosoftTeam property của class trong XAML như sau:

Trước hết chúng ta khai báo window resource:

<Window.Resources>    

        <local:Hyperlogy x:Key="HyperlogyCompany"></local:Hyperlogy>

</Window.Resources>

Sau đó binding trong listbox sử dụng MicrosoftTeam property

<Grid DataContext="{StaticResource HyperlogyCompany}">

  <ListBox ItemsSource="{Binding Path=MicrosoftTeam}"></ListBox>

</Grid>

Fullcode

<Window x:Class="LINQBinding.Window1"

    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

    Title="LINQ Data Binding" Height="200" Width="300" 

        xmlns:local="clr-namespace:LINQBinding">

    <Window.Resources>    

        <local:Hyperlogy x:Key="HyperlogyCompany"></local:Hyperlogy>

    </Window.Resources>

    <Grid DataContext="{StaticResource HyperlogyCompany}">

        <ListBox ItemsSource="{Binding Path=MicrosoftTeam}"></ListBox>

    </Grid>

</Window>