如何使WPF数据网格中的最后一列占用所有左侧空间，总是？

4 回答

• 5

  我刚刚将其实现为附加行为 . 问题是当你将DataGrid的最后一列设置为*时，它会调整大小以适应，但随后其他单元格的所有自动装配都会混乱 . 要解决此问题，附加行为会对其他（非最后一个）单元格进行手动自动调整 .

  这在调整其他列的大小时也有效 - 一旦加载，您可以调整大小，最后一列将始终填充 . 请注意，此行为在Loaded事件上有效

  // Behavior usage: <DataGrid DataGridExtensions.LastColumnFill="True"/>
  public class DataGridExtensions
  {
      public static readonly DependencyProperty LastColumnFillProperty = DependencyProperty.RegisterAttached("LastColumnFill", typeof(bool), typeof(DataGridExtensions), new PropertyMetadata(default(bool), OnLastColumnFillChanged));
  
      public static void SetLastColumnFill(DataGrid element, bool value)
      {
          element.SetValue(LastColumnFillProperty, value);
      }
  
      public static bool GetLastColumnFill(DataGrid element)
      {
          return (bool)element.GetValue(LastColumnFillProperty);
      }
  
      private static void OnLastColumnFillChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
      {
          var dataGrid = d as DataGrid;
          if (dataGrid == null) return;
  
          dataGrid.Loaded -= OnDataGridLoaded;
          dataGrid.Loaded += OnDataGridLoaded;
      }        
  
      private static void OnDataGridLoaded(object sender, RoutedEventArgs e)
      {
          var dataGrid = sender as DataGrid;
          if (dataGrid == null) return;
  
          var lastColumn = dataGrid.Columns.LastOrDefault();
          if(lastColumn != null)
              lastColumn.Width = new DataGridLength(1, DataGridLengthUnitType.Star);
  
          // Autofit all other columns
          foreach (var column in dataGrid.Columns)
          {
              if (column == lastColumn) break;
  
              double beforeWidth = column.ActualWidth;
              column.Width = new DataGridLength(1, DataGridLengthUnitType.SizeToCells);
              double sizeCellsWidth = column.ActualWidth;
              column.Width = new DataGridLength(1, DataGridLengthUnitType.SizeToHeader);
              double sizeHeaderWidth = column.ActualWidth;
              column.MinWidth = Math.Max(beforeWidth, Math.Max(sizeCellsWidth, sizeHeaderWidth));
          }
      }
  }
  

  回复于 2024-04-25T04:16:12+08:00
• 0

  将数据网格的宽度设置为“自动” . 您允许列在网格本身内正确调整大小，但您已将宽度硬连接到200 .

  UPDATE ：根据@micas 's comment, I may have misread. If that'的情况，尝试使用100表示左列的宽度，使用100 *表示右列（注意星号） . 这会将右列的宽度默认为100，但允许它调整大小以填充网格 .

  回复于 2024-04-25T04:16:12+08:00
• 21

  您可以在代码上设置列宽为星号 . 在构造函数中，添加：

  Loaded += (s, e) => dataGrid1.Columns[3].Width =
  new DataGridLength(1, DataGridLengthUnitType.Star);
  

  回复于 2024-04-25T04:16:12+08:00
• 4

  预先警告：这是一个黑客......

  我在Dr. ABT方法中注册了"AutoGeneratedColumns"事件Dr. ABT 's class and copied the Loaded method into it, and it works. I haven'尚未经过彻底的测试，所以YMMV .

  我的改变：

  private static void OnLastColumnFillChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
      {
          var dataGrid = d as DataGrid;
          if (dataGrid == null) return;
  
          dataGrid.Loaded -= OnDataGridLoaded;
          dataGrid.Loaded += OnDataGridLoaded;
  
          dataGrid.AutoGeneratedColumns -= OnDataGrid_AutoGeneratedColumns;
          dataGrid.AutoGeneratedColumns += OnDataGrid_AutoGeneratedColumns;
      }
  
      private static void OnDataGrid_AutoGeneratedColumns(object sender, EventArgs e)
      {
          var dataGrid = sender as DataGrid;
          if (dataGrid == null) return;
  
          var lastColumn = dataGrid.Columns.LastOrDefault();
          if (lastColumn != null)
              lastColumn.Width = new DataGridLength(1, DataGridLengthUnitType.Star);
  
          // Autofit all other columns
          foreach (var column in dataGrid.Columns)
          {
              if (column == lastColumn) break;
  
              double beforeWidth = column.ActualWidth;
              column.Width = new DataGridLength(1, DataGridLengthUnitType.SizeToCells);
              double sizeCellsWidth = column.ActualWidth;
              column.Width = new DataGridLength(1, DataGridLengthUnitType.SizeToHeader);
              double sizeHeaderWidth = column.ActualWidth;
              column.MinWidth = Math.Max(beforeWidth, Math.Max(sizeCellsWidth, sizeHeaderWidth));
          }
      }
  

  哦，不要忘记将命名空间添加到XAML声明中！ :)

  顶部：

  xmlns:ext="clr-namespace:TestProject.Extensions"
  

  然后在DataGrid声明中：

  ext:DataGridExtensions.LastColumnFill="True"
  

  Update ：我说里程会有所不同！我当然做到了 .

  整个“自动调整列”位导致我的一些DataGrid中的列具有可变数量的列，只能与列 Headers 一样宽 . 我删除了那部分，现在它似乎正在处理应用程序中的所有DataGrids .

  我现在有：

  private static void OnDataGrid_AutoGeneratedColumns(object sender, EventArgs e)
      {
          var dataGrid = sender as DataGrid;
          if (dataGrid == null) return;
  
          UpdateColumnWidths(dataGrid);
  
      }
  
      private static void OnDataGridLoaded(object sender, RoutedEventArgs e)
      {
          var dataGrid = sender as DataGrid;
          if (dataGrid == null) return;
  
          UpdateColumnWidths(dataGrid);
      }
  
      private static void UpdateColumnWidths(DataGrid dataGrid)
      {
          var lastColumn = dataGrid.Columns.LastOrDefault();
          if (lastColumn == null) return;
  
          lastColumn.Width = new DataGridLength(1.0d, DataGridLengthUnitType.Star);
  
      }
  

  回复于 2024-04-25T04:16:12+08:00