WPF: Ben GroupedItems yerine GridView Sütun dondurmak için çalışıyorum <a href="http://jqueryfordesigners.com/demo/header-slide.html" rel="nofollow noreferrer">Demo</a></p> <p>: Kaydırma Itemcontrol İçerik Sabit Başlık

Question

mümkün WPF'ın ItemsControl ile böyle bir şey yapmak için mi.

Kaynaklar:

<Window.Resources> 
     <CollectionViewSource x:Key="data" Source="{Binding}"> 
      <CollectionViewSource.GroupDescriptions> 
       <PropertyGroupDescription PropertyName="Date"/> 
      </CollectionViewSource.GroupDescriptions> 
     </CollectionViewSource> 
    </Window.Resources> 

ListView:

<ListView Grid.Column="0" ItemsSource="{Binding Source={StaticResource data}}"> 
    <ListView.View> 
     <GridView> 
      <GridView.Columns> 
       <GridViewColumn Header="Col 1" DisplayMemberBinding="{Binding Col1}" Width="100"/> 
       <GridViewColumn Header="Col 2" DisplayMemberBinding="{Binding Col2}" Width="100"/> 
       <GridViewColumn Header="Col 3" DisplayMemberBinding="{Binding Col3}" Width="100"/> 
      </GridView.Columns> 
     </GridView> 
    </ListView.View> 
    <ListView.GroupStyle> 
     <GroupStyle> 
      <GroupStyle.ContainerStyle> 
       <Style TargetType="{x:Type GroupItem}"> 
        <Setter Property="Template"> 
         <Setter.Value> 
          <ControlTemplate TargetType="{x:Type GroupItem}"> 
             <Grid> 
              <Grid.RowDefinitions> 
               <RowDefinition Height="Auto"/> 
               <RowDefinition Height="Auto"/> 
              </Grid.RowDefinitions> 
              <Grid Grid.Row="0"> 
             <Grid.ColumnDefinitions> 
              <ColumnDefinition Width="*"/> 
             </Grid.ColumnDefinitions> 
             <TextBlock Background="Beige" FontWeight="Bold" Text="{Binding Path=Name, StringFormat={}{0}}"/> 
            </Grid> 
            <DockPanel Grid.Row="1"> 
             <ItemsPresenter Grid.Row="2"></ItemsPresenter> 
            </DockPanel> 
             </Grid> 
          </ControlTemplate> 
         </Setter.Value> 
        </Setter> 
       </Style> 
      </GroupStyle.ContainerStyle> 
     </GroupStyle> 
    </ListView.GroupStyle> 
</ListView> 

KOD ARKASI:

public MainWindow() 
     { 
      InitializeComponent(); 

      List<String> colList1 = new List<string>(){"Item1", "Item2", "Item3", "Item4", "Item5", "Item6", "Item7"}; 
      List<String> colList2 = new List<string>(){"1", "2", "3", "4", "5", "6"}; 


      ObservableCollection<Data> dataCollection = new ObservableCollection<Data>(); 

      for (var a = 0; a<100; a++){ 
       Random rnd = new Random(); 
       int min = rnd.Next(5000); 
       int rnd1 = rnd.Next(0, 6); 
       int rnd2 = rnd.Next(0, 5); 

       dataCollection .Add(
        new Data(){ 
        Date = DateTime.Now.AddMinutes(min).ToString("hh:MM tt"), 
        Col1= colList1[rnd2], 
        Col2= String.Format("Col2: {0}", "X"), 
        Col3= colList2[rnd2] 
        } 
       ); 

      } 
      this.DataContext = dataCollection; 
      } 

      public class Data 
      { 
      public string Date { get; set; } 
      public string Col1{ get; set; } 
      public string Col2{ get; set; } 
      public string Col3{ get; set; } 
      } 

Answer 1

Bu çözüm büyük değil ve bu, hack-imsi ama bu wil Temel olarak istediğini yap. Liste görünüm başlıklarını görünmez yaptım, liste görünümünün üstüne bir metin bloğu koydum ve metin değerini liste kutusundaki ilk görünür öğenin groupitemine ayarladım. Hacky, ama geldiğim en iyisi.

public partial class MainWindow : Window 
{ 

    public MainWindow() 
    { 
     InitializeComponent(); 

     List<String> colList1 = new List<string>() { "Item1", "Item2", "Item3", "Item4", "Item5", "Item6", "Item7" }; 
     List<String> colList2 = new List<string>() { "1", "2", "3", "4", "5", "6" }; 


     ObservableCollection<Data> dataCollection = new ObservableCollection<Data>(); 

     for (var a = 0; a < 100; a++) 
     { 
      Random rnd = new Random(); 
      int min = rnd.Next(5000); 
      int rnd1 = rnd.Next(0, 6); 
      int rnd2 = rnd.Next(0, 5); 

      dataCollection.Add(
       new Data() 
       { 
        Date = DateTime.Now.AddMinutes(min).ToString("hh:MM tt"), 
        Col1 = colList1[rnd2], 
        Col2 = String.Format("Col2: {0}", "X"), 
        Col3 = colList2[rnd2] 
       } 
      ); 

     } 
     this.DataContext = dataCollection; 
    } 

    public class Data 
    { 
     public string Date { get; set; } 
     public string Col1 { get; set; } 
     public string Col2 { get; set; } 
     public string Col3 { get; set; } 
    } 

    private void grid_ScrollChanged(object sender, ScrollChangedEventArgs e) 
    { 
     if (grid.Items.Count > 0) 
     { 
      HitTestResult hitTest = VisualTreeHelper.HitTest(grid, new Point(5, 5)); 
      System.Windows.Controls.ListViewItem item = GetListViewItemFromEvent(null, hitTest.VisualHit) as System.Windows.Controls.ListViewItem; 
      if (item != null) 
       Head.Text = ((Data)item.Content).Date; 
     } 

    } 

    System.Windows.Controls.ListViewItem GetListViewItemFromEvent(object sender, object originalSource) 
    { 
     DependencyObject depObj = originalSource as DependencyObject; 
     if (depObj != null) 
     { 
      // go up the visual hierarchy until we find the list view item the click came from 
      // the click might have been on the grid or column headers so we need to cater for this 
      DependencyObject current = depObj; 
      while (current != null && current != grid) 
      { 
       System.Windows.Controls.ListViewItem ListViewItem = current as System.Windows.Controls.ListViewItem; 
       if (ListViewItem != null) 
       { 
        return ListViewItem; 
       } 
       current = VisualTreeHelper.GetParent(current); 
      } 
     } 

     return null; 
    } 

} 

XAML:

<Window x:Class="header.MainWindow" 
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
    Title="MainWindow" Height="350" Width="auto" SizeToContent="Width"> 
<Window.Resources> 
    <CollectionViewSource x:Key="data" Source="{Binding}"> 
     <CollectionViewSource.GroupDescriptions> 
      <PropertyGroupDescription PropertyName="Date"/> 
     </CollectionViewSource.GroupDescriptions> 
    </CollectionViewSource> 

    <Style x:Key="myHeaderStyle" TargetType="{x:Type GridViewColumnHeader}"> 
     <Setter Property="Visibility" Value="Collapsed" /> 
    </Style> 
</Window.Resources> 
<Grid> 
    <StackPanel> 
    <TextBlock Name="Head" Grid.Row="0"/> 
      <ListView Name="grid" Grid.Column="0" Grid.Row="1" ItemsSource="{Binding Source={StaticResource data}}" Height="300" ScrollViewer.ScrollChanged="grid_ScrollChanged"> 
       <ListView.View> 
        <GridView ColumnHeaderContainerStyle="{StaticResource myHeaderStyle}"> 
         <GridView.Columns> 
          <GridViewColumn DisplayMemberBinding="{Binding Col1}" Width="100"/> 
          <GridViewColumn DisplayMemberBinding="{Binding Col2}" Width="100"/> 
          <GridViewColumn DisplayMemberBinding="{Binding Col3}" Width="100"/> 
         </GridView.Columns> 
        </GridView> 
       </ListView.View> 
       <ListView.GroupStyle> 
        <GroupStyle> 
         <GroupStyle.ContainerStyle> 
          <Style TargetType="{x:Type GroupItem}"> 
           <Setter Property="Template"> 
            <Setter.Value> 
             <ControlTemplate TargetType="{x:Type GroupItem}"> 
              <Grid> 
               <Grid.RowDefinitions> 
                <RowDefinition Height="Auto"/> 
                <RowDefinition Height="Auto"/> 
               </Grid.RowDefinitions> 
               <Grid Grid.Row="0"> 
                <Grid.ColumnDefinitions> 
                 <ColumnDefinition Width="*"/> 
                </Grid.ColumnDefinitions> 
                <TextBlock Background="Beige" FontWeight="Bold" Text="{Binding Path=Name, StringFormat={}{0}}"/> 
               </Grid> 
               <DockPanel Grid.Row="1"> 
                <ItemsPresenter Grid.Row="2"></ItemsPresenter> 
               </DockPanel> 
              </Grid> 
             </ControlTemplate> 
            </Setter.Value> 
           </Setter> 
          </Style> 
         </GroupStyle.ContainerStyle> 
        </GroupStyle> 
       </ListView.GroupStyle> 
      </ListView> 
    </StackPanel> 
</Grid> 

DÜZENLEME: Sabit ScrollChanged olay.

private void grid_ScrollChanged(object sender, ScrollChangedEventArgs e) 
    { 
     if (grid.Items.Count > 0) 
     { 
      Point point = new Point(5, 5); 
      foreach(Data lvItem in grid.Items) 
      { 
       HitTestResult hitTest = VisualTreeHelper.HitTest(grid, point); 
       ListViewItem item = GetListViewItemFromEvent(null, hitTest.VisualHit) as System.Windows.Controls.ListViewItem; 
       if (item != null) 
       { 
        Data value = ((Data)item.Content); 
        Head.Text = ((Data)item.Content).Date; 
        break; 
       } 
       else 
       { 
        point.X += 5; 
        point.Y += 5; 
       } 
      } 
     } 

    } 

Answer 2

Çözümüm, grup üstbilgisi stilini paylaşan bir TextBlock yer paylaşımını kullanır. Konumlandırma ve doğru HitTesting, zor kısımdır, ancak bu, düzen veya mantıktaki küçük değişiklikler için kırılmadığından eminim.

ColumnHeader'ı gizlemek isteyip istemediğinizden emin değildim, ancak bu kolay ve here ile gösterilenlerden başka bir ayarlamaya gerek duymuyor. geride

Kodu:

using System; 
using System.Collections.Generic; 
using System.Collections.ObjectModel; 
using System.Windows; 
using System.Windows.Controls; 
using System.Windows.Media; 

namespace WpfApplication1 
{ 
    public partial class FreezingGroupHeader : UserControl 
    { 
     private double _listviewHeaderHeight; 
     private double _listviewSideMargin; 

     public FreezingGroupHeader() 
     { 
      InitializeComponent(); 

      List<String> colList1 = new List<string>() { "Item1", "Item2", "Item3", "Item4", "Item5", "Item6", "Item7" }; 
      List<String> colList2 = new List<string>() { "1", "2", "3", "4", "5", "6" }; 

      ObservableCollection<Data> dataCollection = new ObservableCollection<Data>(); 

      Random rnd = new Random(); 

      for (var a = 0; a < 100; a++) 
      { 
       int min = rnd.Next(5000); 
       int rnd1 = rnd.Next(0, 6); 
       int rnd2 = rnd.Next(0, 5); 

       dataCollection.Add(
        new Data() 
        { 
         Date = DateTime.Now.AddMinutes(min).ToString("hh:MM tt"), 
         Col1 = colList1[rnd2], 
         Col2 = String.Format("Col2: {0}", "X"), 
         Col3 = colList2[rnd2] 
        } 
       ); 
      } 
      this.DataContext = dataCollection; 

      this.Loaded += OnLoaded; 
     } 

     private void OnLoaded(object sender, RoutedEventArgs e) 
     { 
      // Position frozen header 
      GetListViewMargins(this.listview1); 

      Thickness margin = this.frozenGroupHeader.Margin; 
      margin.Top = _listviewHeaderHeight; 
      margin.Right = SystemParameters.VerticalScrollBarWidth + _listviewSideMargin; 
      margin.Left = _listviewSideMargin; 

      this.frozenGroupHeader.Margin = margin; 

      UpdateFrozenGroupHeader(); 
     } 

     private void listview1_ScrollChanged(object sender, ScrollChangedEventArgs e) 
     { 
      UpdateFrozenGroupHeader(); 
     } 

     /// <summary> 
     /// Sets text and visibility of frozen header 
     /// </summary> 
     private void UpdateFrozenGroupHeader() 
     { 
      if (listview1.HasItems) 
      { 
       // Text of frozenGroupHeader 
       GroupItem group = GetFirstVisibleGroupItem(this.listview1); 
       if (group != null) 
       { 
        object data = group.Content; 
        this.frozenGroupHeader.Text = data.GetType().GetProperty("Name").GetValue(data, null) as string; // slight hack 
       } 
       this.frozenGroupHeader.Visibility = Visibility.Visible; 
      } 
      else 
       this.frozenGroupHeader.Visibility = Visibility.Collapsed; 
     } 

     /// <summary> 
     /// Sets values that will be used in the positioning of the frozen header 
     /// </summary> 
     private void GetListViewMargins(ListView listview) 
     { 
      if (listview.HasItems) 
      { 
       object o = listview.Items[0]; 
       ListViewItem firstItem = (ListViewItem)listview.ItemContainerGenerator.ContainerFromItem(o); 
       if (firstItem != null) 
       { 
        GroupItem group = FindUpVisualTree<GroupItem>(firstItem); 
        Point p = group.TranslatePoint(new Point(0, 0), listview); 
        _listviewHeaderHeight = p.Y; // height of columnheader 
        _listviewSideMargin = p.X; // listview borders 
       } 
      } 
     } 

     /// <summary> 
     /// Gets the first visible GroupItem in the listview 
     /// </summary> 
     private GroupItem GetFirstVisibleGroupItem(ListView listview) 
     { 
      HitTestResult hitTest = VisualTreeHelper.HitTest(listview, new Point(5, _listviewHeaderHeight + 5)); 
      GroupItem group = FindUpVisualTree<GroupItem>(hitTest.VisualHit); 
      return group; 
     } 


     /// <summary> 
     /// walk up the visual tree to find object of type T, starting from initial object 
     /// http://www.codeproject.com/Tips/75816/Walk-up-the-Visual-Tree 
     /// </summary> 
     private static T FindUpVisualTree<T>(DependencyObject initial) where T : DependencyObject 
     { 
      DependencyObject current = initial; 

      while (current != null && current.GetType() != typeof(T)) 
      { 
       current = VisualTreeHelper.GetParent(current); 
      } 
      return current as T; 
     } 

     public class Data 
     { 
      public string Date { get; set; } 
      public string Col1 { get; set; } 
      public string Col2 { get; set; } 
      public string Col3 { get; set; } 
     } 
    } 
} 

Xaml:

<UserControl x:Class="WpfApplication1.FreezingGroupHeader" 
      xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
      xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
      xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
      mc:Ignorable="d" 
      d:DesignHeight="300" d:DesignWidth="300" 
      > 

    <UserControl.Resources> 
     <CollectionViewSource x:Key="data" Source="{Binding}"> 
      <CollectionViewSource.GroupDescriptions> 
       <PropertyGroupDescription PropertyName="Date"/> 
      </CollectionViewSource.GroupDescriptions> 
     </CollectionViewSource> 

     <Style x:Key="GroupHeaderStyle1" TargetType="{x:Type TextBlock}"> 
      <Setter Property="Background" Value="Beige" /> 
      <Setter Property="Foreground" Value="Black" /> 
      <Setter Property="FontWeight" Value="Bold" /> 
     </Style> 
    </UserControl.Resources> 

    <Grid> 
     <ListView x:Name="listview1" Grid.Column="0" ItemsSource="{Binding Source={StaticResource data}}" ScrollViewer.ScrollChanged="listview1_ScrollChanged" > 
      <ListView.View> 
       <GridView> 
        <GridView.Columns> 
         <GridViewColumn Header="Col 1" DisplayMemberBinding="{Binding Col1}" Width="100"/> 
         <GridViewColumn Header="Col 2" DisplayMemberBinding="{Binding Col2}" Width="100"/> 
         <GridViewColumn Header="Col 3" DisplayMemberBinding="{Binding Col3}" Width="100"/> 
        </GridView.Columns> 
       </GridView> 
      </ListView.View> 
      <ListView.GroupStyle> 
       <GroupStyle> 
        <GroupStyle.ContainerStyle> 
         <Style TargetType="{x:Type GroupItem}"> 
          <Setter Property="Template"> 
           <Setter.Value> 
            <ControlTemplate TargetType="{x:Type GroupItem}"> 
             <Grid> 
              <Grid.RowDefinitions> 
               <RowDefinition Height="Auto"/> 
               <RowDefinition Height="Auto"/> 
              </Grid.RowDefinitions> 
              <Grid Grid.Row="0"> 
               <Grid.ColumnDefinitions> 
                <ColumnDefinition Width="*"/> 
               </Grid.ColumnDefinitions> 
               <TextBlock Style="{StaticResource GroupHeaderStyle1}" Text="{Binding Name, StringFormat={}{0}}" /> 
              </Grid> 
              <DockPanel Grid.Row="1"> 
               <ItemsPresenter Grid.Row="2"></ItemsPresenter> 
              </DockPanel> 
             </Grid> 
            </ControlTemplate> 
           </Setter.Value> 
          </Setter> 
         </Style> 
        </GroupStyle.ContainerStyle> 
       </GroupStyle> 
      </ListView.GroupStyle> 
     </ListView> 
     <TextBlock x:Name="frozenGroupHeader" Style="{StaticResource GroupHeaderStyle1}" VerticalAlignment="Top"/> 
    </Grid> 
</UserControl> 

Answer 3

ben sadece benzer bir sorun ile karşılaştım olarak ve 'hack-imsi' çözüm ihtiyaçlarımı sığmadı ve Genellikle üretim ortamlarında 'hack-ish' gibi şeyler istemiyorum, paylaşmak istediğim bir genel çözüm geliştirdim. ekli Sınıf anahtar Aşağıdaki özelliklere sahiptir: uyumlu

• MVVM
• hiçbir planda kodlama
• uyumlu ListView, GridView'da, ItemsControl, hatta statik xaml ile! - ScollViewer kullanarak herhangi bir şeyle çalışmalı ...
• grup et

xaml kullanımını (sadece iç ControlTemplate) beyan bağlı özelliğini kullanır:

<ControlTemplate TargetType="{x:Type GroupItem}"> 
    <Grid> 
     <Grid.RowDefinitions> 
      <RowDefinition Height="Auto"/> 
      <RowDefinition Height="Auto"/> 
     </Grid.RowDefinitions> 
     <Grid Grid.Row="0" local:StickyScrollHeader.AttachToControl="{Binding RelativeSource={RelativeSource Mode=FindAncestor,AncestorType=Grid}}"> 
      <TextBlock Background="Beige" FontWeight="Bold" Text="{Binding Path=Name, StringFormat={}{0}}"/> 
      <Grid.ColumnDefinitions> 
       <ColumnDefinition Width="*"/> 
      </Grid.ColumnDefinitions> 
     </Grid> 
     <DockPanel Grid.Row="1"> 
      <ItemsPresenter Grid.Row="2"></ItemsPresenter> 
     </DockPanel> 
    </Grid> 
</ControlTemplate> 

Sınıf (her yerde koymak gerekirse xaml-ad ekleyin):

public static class StickyScrollHeader 
{ 
    public static FrameworkElement GetAttachToControl(FrameworkElement obj) 
    { 
     return (FrameworkElement)obj.GetValue(AttachToControlProperty); 
    } 

    public static void SetAttachToControl(FrameworkElement obj, FrameworkElement value) 
    { 
     obj.SetValue(AttachToControlProperty, value); 
    } 

    private static ScrollViewer FindScrollViewer(FrameworkElement item) 
    { 
     FrameworkElement treeItem = item; 
     FrameworkElement directItem = item; 

     while (treeItem != null) 
     { 
      treeItem = VisualTreeHelper.GetParent(treeItem) as FrameworkElement; 
      if (treeItem is ScrollViewer) 
      { 
       return treeItem as ScrollViewer; 
      } 
      else if (treeItem is ScrollContentPresenter) 
      { 
       return (treeItem as ScrollContentPresenter).ScrollOwner; 
      } 
     } 

     while (directItem != null) 
     { 
      directItem = directItem.Parent as FrameworkElement; 

      if (directItem is ScrollViewer) 
      { 
       return directItem as ScrollViewer; 
      } 
      else if (directItem is ScrollContentPresenter) 
      { 
       return (directItem as ScrollContentPresenter).ScrollOwner; 
      } 
     } 

     return null; 
    } 

    private static ScrollContentPresenter FindScrollContentPresenter(FrameworkElement sv) 
    { 
     int childCount = VisualTreeHelper.GetChildrenCount(sv); 

     for (int i = 0; i < childCount; i++) 
     { 
      if (VisualTreeHelper.GetChild(sv, i) is FrameworkElement child && child is ScrollContentPresenter) 
      { 
       return child as ScrollContentPresenter; 
      } 
     } 

     for (int i = 0; i < childCount; i++) 
     { 
      if (FindScrollContentPresenter(VisualTreeHelper.GetChild(sv, i) as FrameworkElement) is FrameworkElement child && child is ScrollContentPresenter) 
      { 
       return child as ScrollContentPresenter; 
      } 
     } 

     return null; 
    } 

    public static readonly DependencyProperty AttachToControlProperty = 
     DependencyProperty.RegisterAttached("AttachToControl", typeof(FrameworkElement), typeof(StickyScrollHeader), new PropertyMetadata(null, (s, e) => 
     { 
      try 
      { 
       if (!(s is FrameworkElement targetControl)) 
       { return; } 

       Canvas.SetZIndex(targetControl, 999); 

       ScrollViewer sv; 
       FrameworkElement parent; 

       if (e.OldValue is FrameworkElement oldParentControl) 
       { 
        ScrollViewer oldSv = FindScrollViewer(oldParentControl); 
        parent = oldParentControl; 
        oldSv.ScrollChanged -= Sv_ScrollChanged; 
       } 

       if (e.NewValue is FrameworkElement newParentControl) 
       { 
        sv = FindScrollViewer(newParentControl); 
        parent = newParentControl; 
        sv.ScrollChanged += Sv_ScrollChanged; 
       } 

       void Sv_ScrollChanged(object sender, ScrollChangedEventArgs sce) 
       { 
        if (!parent.IsVisible) { return; } 

        try 
        { 

         ScrollViewer isv = sender as ScrollViewer; 
         ScrollContentPresenter scp = FindScrollContentPresenter(isv); 

         var relativeTransform = parent.TransformToAncestor(scp); 
         Rect parentRenderRect = relativeTransform.TransformBounds(new Rect(new Point(0, 0), parent.RenderSize)); 
         Rect intersectingRect = Rect.Intersect(new Rect(new Point(0, 0), scp.RenderSize), parentRenderRect); 
         if (intersectingRect != Rect.Empty) 
         { 
          TranslateTransform targetTransform = new TranslateTransform(); 

          if (parentRenderRect.Top < 0) 
          { 
           double tempTop = (parentRenderRect.Top * -1); 

           if (tempTop + targetControl.RenderSize.Height < parent.RenderSize.Height) 
           { 
            targetTransform.Y = tempTop; 
           } 
           else if (tempTop < parent.RenderSize.Height) 
           { 
            targetTransform.Y = tempTop - (targetControl.RenderSize.Height - intersectingRect.Height); 
           } 
          } 
          else 
          { 
           targetTransform.Y = 0; 
          } 
          targetControl.RenderTransform = targetTransform; 
         } 
        } 
        catch { } 
       } 
      } 
      catch { } 
     })); 
} 

Bu sorunun başkalarına yardımcı olmasını da umarım;)