在“代码隐藏”中将 WPF ListView 列居中

Question

我试图在代码隐藏中的 ListView 中居中列。由于列是在运行时动态创建的，因此在 XAML 中没有执行此操作的选项。

这里是我创建的助手。设置字体颜色等其他属性效果很好 - 有什么想法吗？

private void ListViewHelper(GridView gridView, ListView listView, MatrixId assignment, string key, IValueConverter converter)
{
   // new column
   GridViewColumn gridViewColumn = new GridViewColumn();

   // header text and formating
   gridViewColumn.Header = new TextBlock { Text = assignment.Id.ToString(), TextAlignment = TextAlignment.Center, Padding = new Thickness(7, 0, 0, 0), Width = 50 };

   // databinding & converter
   FrameworkElementFactory frameworkElementFactory = new FrameworkElementFactory(typeof(TextBlock));
   DataTemplate dataTemplate = new DataTemplate();
   dataTemplate.VisualTree = frameworkElementFactory;
   gridViewColumn.CellTemplate = dataTemplate;
   Binding binding = new Binding(assignment.Id.ToString() + key);
   binding.Converter = converter;

   // *** this does not work ***             
   frameworkElementFactory.SetValue(TextBlock.TextAlignmentProperty, TextAlignment.Right);
   frameworkElementFactory.SetValue(TextBlock.HorizontalAlignmentProperty, HorizontalAlignment.Right);

   frameworkElementFactory.SetValue(TextBlock.ForegroundProperty, new SolidColorBrush(Color.FromRgb(100, 100, 100)));
   frameworkElementFactory.SetBinding(TextBlock.TextProperty, binding);

   // add column
   gridView.Columns.Add(gridViewColumn);
}

Answer 1

如果您想在ListView 中将GridView 中的内容居中，您可以通过为ListViewItem 创建项目容器样式并将HorizontalContentAlignment 设置为Center 来实现。

var itemContainerStyle = new Style(typeof(ListViewItem));
var horizontalContentAlignmentSetter = new Setter(HorizontalContentAlignmentProperty, HorizontalAlignment.Center);
itemContainerStyle.Setters.Add(horizontalContentAlignmentSetter);

listView.ItemContainerStyle = itemContainerStyle;

这里，listView 是您的列表视图实例。对齐将应用于所有列。如果需要单独对齐列，请将项目容器模板中的HorizontalContentAlignment 设置为Stretch。

var itemContainerStyle = new Style(typeof(ListViewItem));
var horizontalContentAlignmentSetter = new Setter(HorizontalContentAlignmentProperty, HorizontalAlignment.Stretch);
itemContainerStyle.Setters.Add(horizontalContentAlignmentSetter);

listView.ItemContainerStyle = itemContainerStyle;

然后将CellTemplate内控件的HorizontalAlignment设置为您需要的。

private void ListViewHelper(GridView gridView, ListView listView, MatrixId assignment, string key, IValueConverter converter)
{
   // ...your code.

   // Set the alignment to "Left", "Center", "Right" or "Stretch"
   frameworkElementFactory.SetValue(TextBlock.HorizontalAlignmentProperty, HorizontalAlignment.Right);

   // ...your code.
}