DataGrid增加筛选

[HaHa-ZYK]

DataGrid希望能够支持在列头右键增加一个筛选，像Excel的筛选那样，筛选表格中的内容。

[yanjinhuagood]

• 1）xaml
  

  WPFDevelopers/src/WPFDevelopers.Samples.Shared/ExampleViews/DataGridFilterExample.xaml

  Lines 15 to 35 in 55ef0c3

  	<TabItem Header="Binding Source">
  	<DataGrid
  	wd:DataGridHelper.FilterEngine="{Binding Engines}"
  	wd:ElementHelper.CornerRadius="3"
  	ItemsSource="{Binding Engines.TypedView}">
  	<DataGrid.Columns>
  	<DataGridTextColumn Binding="{Binding Name}" Header="Name" />
  	<DataGridTextColumn Binding="{Binding Age}" Header="Age" />
  	<DataGridTextColumn Binding="{Binding City}" Header="City" />
  	</DataGrid.Columns>
  	</DataGrid>
  	</TabItem>
  	<TabItem Header="Code CSharp">
  	<DataGrid x:Name="myDataGridCodeCSharp">
  	<DataGrid.Columns>
  	<DataGridTextColumn Binding="{Binding Name}" Header="Name" />
  	<DataGridTextColumn Binding="{Binding Age}" Header="Age" />
  	<DataGridTextColumn Binding="{Binding City}" Header="City" />
  	</DataGrid.Columns>
  	</DataGrid>
  	</TabItem>

2）CSharp

WPFDevelopers/src/WPFDevelopers.Samples.Shared/ExampleViews/DataGridFilterExample.xaml.cs

Lines 13 to 61 in 55ef0c3

	public partial class DataGridFilterExample : UserControl
	{
	public FilterEngine<Person> Engines
	{
	get { return (FilterEngine<Person>)GetValue(EnginesProperty); }
	set { SetValue(EnginesProperty, value); }
	}
	public static readonly DependencyProperty EnginesProperty =
	DependencyProperty.Register("Engines", typeof(FilterEngine<Person>), typeof(DataGridFilterExample), new PropertyMetadata(null));
	public DataGridFilterExample()
	{
	InitializeComponent();
	DataContext = this;
	Loaded += DataGridFilterExample_Loaded;
	}
	private void DataGridFilterExample_Loaded(object sender, System.Windows.RoutedEventArgs e)
	{
	//Binding
	Engines = new FilterEngine<Person>();
	var list = new List<Person>();
	for (int i = 0; i < 10000; i++)
	{
	list.Add(new Person
	{
	Name = "Name" + i,
	City = i % 3 == 0 ? "Beijing" : "Shanghai",
	Age = 20 + (i % 10)
	});
	}
	Engines.Source = list;
	Engines.Refresh();
	//C#
	var Persons = new FilterEngine<Person>();
	Persons.Source = list;
	Persons.Refresh();
	DataGridHelper.SetFilterEngine(myDataGridCodeCSharp, Persons);
	myDataGridCodeCSharp.ItemsSource = Persons.TypedView;
	//default
	myDataGridDefault.ItemsSource = list;
	}
	}
	public class Person
	{
	public string Name { get; set; }
	public int Age { get; set; }
	public string City { get; set; }
	}