WPF 精修篇 DataGrid 数据源排序

Posted 2021-03-21 lonelyxmas

原文:WPF 精修篇 DataGrid 数据源排序

效果

        <DataGrid x:Name="datagrid" ItemsSource="{Binding ElementName=Mwindow, Path=Preson}" Margin="0,0,0,20">
            <DataGrid.Columns>
            <DataGridTextColumn Binding="{Binding Name}" Header="Name"></DataGridTextColumn>
            <DataGridTextColumn Binding="{Binding Address}" Header="Address"></DataGridTextColumn>
            <DataGridTextColumn Binding="{Binding Age}" Header="Age"></DataGridTextColumn>
            </DataGrid.Columns>
        </DataGrid>
        <CheckBox x:Name="sort" Content="排序" HorizontalAlignment="Left" Margin="466,300,0,0" VerticalAlignment="Top" Checked="CheckBox_Checked"/>

    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            
                Preson = new ObservableCollection<Preson>() { 
                new Preson() { Name = "慧哥1", Address = "大连1", Age = 31 },
                new Preson() { Name = "慧哥2", Address = "大连2", Age = 32 },
                new Preson() { Name = "慧哥3", Address = "大连3", Age = 33 },
                new Preson() { Name = "慧哥4", Address = "大连4", Age = 34 },
                new Preson() { Name = "慧哥5", Address = "大连5", Age = 35 },
                new Preson() { Name = "123", Address = "大连6", Age = 12 },
                new Preson() { Name = "444", Address = "大连7", Age = 14 },
                new Preson() { Name = "222", Address = "大连8", Age = 33 },
                new Preson() { Name = "1312", Address = "大连9", Age = 22 }
            };
        
 
          
        }
 
 
 
        public ObservableCollection<Preson> Preson
        {
            get { return (ObservableCollection<Preson>)GetValue(PresonProperty); }
            set { SetValue(PresonProperty, value); }
        }
 
        // Using a DependencyProperty as the backing store for Preson.  This enables animation, styling, binding, etc...
        public static readonly DependencyProperty PresonProperty =
            DependencyProperty.Register("Preson", typeof(ObservableCollection<Preson>), typeof(MainWindow), new PropertyMetadata(null));
 
        private void CheckBox_Checked(object sender, RoutedEventArgs e)
        {
            var cvs = CollectionViewSource.GetDefaultView(datagrid.ItemsSource);
            if(cvs!=null&&cvs.CanSort)
            {
                cvs.SortDescriptions.Clear();
                if (sort.IsChecked == true)
                {
                    cvs.SortDescriptions.Add(new System.ComponentModel.SortDescription("Age", System.ComponentModel.ListSortDirection.Descending));
                }
              
            }
        }
 
        
 
 
 
        
    }

 

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