gridview 相关问题

我想以这种方式在ListView中声明GridViewColumn： [[[[[[[[[] []] 一个简单的解决方案是编写附加行为。此实现使用两个属性。必须在相应的ListView.IsTextAlignmentEnabled的ListView和ListView.TextAlignment类型的TextAlignment上设置TextAlignment（如果未设置此属性，则该值默认为GridViewColumn）。这是因为没有简单的方法来获取TextAlignment.Left的父级ListView。 ListView.cs GridViewColumn 用法示例 // Attached Behavior public class ListView : DependencyObject { #region IsColumnTextAlignmentEnabled attached property public static readonly DependencyProperty IsColumnTextAlignmentEnabledProperty = DependencyProperty.RegisterAttached( "IsColumnTextAlignmentEnabled", typeof(bool), typeof(ListView), new PropertyMetadata(false, ListView.OnIsColumnTextAlignmentEnabledChanged)); public static void SetIsColumnTextAlignmentEnabled(DependencyObject attachingElement, bool value) => attachingElement.SetValue(ListView.IsColumnTextAlignmentEnabledProperty, value); public static bool GetIsColumnTextAlignmentEnabled(DependencyObject attachingElement) => (bool) attachingElement.GetValue(ListView.IsColumnTextAlignmentEnabledProperty); #endregion #region TextAlignment attached property public static readonly DependencyProperty TextAlignmentProperty = DependencyProperty.RegisterAttached( "TextAlignment", typeof(TextAlignment), typeof(ListView), new PropertyMetadata(TextAlignment.Left, ListView.OnTextAlignmentChanged)); public static void SetTextAlignment(DependencyObject attachingElement, TextAlignment value) => attachingElement.SetValue(ListView.TextAlignmentProperty, value); public static TextAlignment GetTextAlignment(DependencyObject attachingElement) => (TextAlignment) attachingElement.GetValue(ListView.TextAlignmentProperty); #endregion private static Dictionary<GridViewColumn, System.Windows.Controls.ListView> ColumnListViewTable { get; } static ListView() { ListView.ColumnListViewTable = new Dictionary<GridViewColumn, System.Windows.Controls.ListView>(); } private static void OnTextAlignmentChanged(DependencyObject attachingElement, DependencyPropertyChangedEventArgs e) { // Get the parent ListView of the current column if (attachingElement is GridViewColumn gridViewColumn && ListView.ColumnListViewTable.TryGetValue(gridViewColumn, out System.Windows.Controls.ListView listView)) { ListView.AlignColumns(listView); } } private static void OnIsColumnTextAlignmentEnabledChanged(DependencyObject attachingElement, DependencyPropertyChangedEventArgs e) { if (!(attachingElement is System.Windows.Controls.ListView listView)) { return; } bool isEnabled = (bool) e.NewValue; if (isEnabled) { if (!listView.IsLoaded) { listView.Loaded += ListView.InitializeColumnsOnListViewLoaded; return; } ListView.InitializeColumns(listView); } else { ListView.UnregisterColumns(listView); } } private static void InitializeColumnsOnListViewLoaded(object sender, RoutedEventArgs e) { var listView = sender as System.Windows.Controls.ListView; listView.Loaded -= ListView.InitializeColumnsOnListViewLoaded; ListView.InitializeColumns(listView); } private static void InitializeColumns(System.Windows.Controls.ListView listView) { if (ListView.TryRegisterColumns(listView)) { ListView.AlignColumns(listView); } } private static void AlignColumns(System.Windows.Controls.ListView listView) { IEnumerable<ListBoxItem> listViewItemContainers = listView.Items .OfType<object>() .Select(item => listView.ItemContainerGenerator.ContainerFromItem(item) as ListBoxItem); foreach (ListBoxItem listViewItemContainer in listViewItemContainers) { if (!listViewItemContainer.TryFindVisualChildElement(out GridViewRowPresenter rowPresenter)) { continue; } List<object> rowElements = LogicalTreeHelper.GetChildren(rowPresenter) .Cast<object>() .ToList(); for (int columnIndex = 0; columnIndex < rowPresenter.Columns.Count; columnIndex++) { if (rowElements.ElementAt(columnIndex) is TextBlock textBlock) { textBlock.TextAlignment = ListView.GetTextAlignment(rowPresenter.Columns.ElementAt(columnIndex)); } // Because the TextBlock's width is set to Auto // the aligned text will always appear to be left aligned. // Therefore set equivalent HorizontalAlignment to compensate. // Also setting the HorizontalAlignment enables alignment of all FrameworkElements if (rowElements.ElementAt(columnIndex) is FrameworkElement frameworkElement) { frameworkElement.HorizontalAlignment = ListView.GetHorizontalAlignment(textBlock.TextAlignment); } } } } private static HorizontalAlignment GetHorizontalAlignment(TextAlignment textBlockTextAlignment) { switch (textBlockTextAlignment) { case TextAlignment.Center: return HorizontalAlignment.Center; case TextAlignment.Right: return HorizontalAlignment.Right; case TextAlignment.Justify: return HorizontalAlignment.Stretch; default: return HorizontalAlignment.Left; } } private static void UnregisterColumns(System.Windows.Controls.ListView listView) { if (!(listView.View is System.Windows.Controls.GridView gridView)) { return; } gridView.Columns .ToList() .ForEach(column => ListView.ColumnListViewTable.Remove(column)); } private static bool TryRegisterColumns(System.Windows.Controls.ListView listView) { if (!(listView.View is System.Windows.Controls.GridView gridView)) { return false; } gridView.Columns .ToList() .ForEach(column => ListView.ColumnListViewTable.Add(column, listView)); return true; } }

c# wpf listview gridview

回答 1 投票 0

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我想以这种方式在ListView中声明GridViewColumn： [[[[[[[[[] []] 只需定义将特定布局定义为资源的DataTemplate并重用它： <ListView ItemsSource="{Binding Sells}"> <ListView.Resources> <DataTemplate x:Key="TextAlignmentCenterTemplate" > <TextBlock Text="{Binding NoOfOrder}" TextAlignment="Center"/> </DataTemplate> <DataTemplate x:Key="TextAlignmentRightTemplate" > <TextBlock Text="{Binding NoOfOrder}" TextAlignment="Right"/> </DataTemplate> </ListView.Resources> <ListView.View> <GridView> <GridViewColumn Header="No. of order" Width="80" DisplayMemberBinding="{Binding NoOfOrder, StringFormat=N0}" CellTemplate="{StaticResource TextAlignmentCenterTemplate}" /> <GridViewColumn Header="Quantity" Width="100" DisplayMemberBinding="{Binding Quantity, StringFormat=N0}" CellTemplate="{StaticResource TextAlignmentRightTemplate}"/> <GridViewColumn Header="Price" Width="100" DisplayMemberBinding="{Binding Price, StringFormat=N2}" CellTemplate="{StaticResource TextAlignmentRightTemplate}"/> </GridView> </ListView.View> </ListView>

c# wpf listview gridview

回答 1 投票 0

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