【转】【WPF】Grid显示边框线
使用附加属性:
<Grid Height="120" Grid.Row="1" cui:GridOptions.ShowBorder="True" ></Grid>
public class GridOptions { //暂时不处理实时显示的事情 #region 显示边框信息 public static readonly DependencyProperty ShowBorderProperty = DependencyProperty.RegisterAttached("ShowBorder", typeof(bool), typeof(GridOptions) , new PropertyMetadata(OnShowBorderChanged)); public static bool GetShowBorder(DependencyObject obj) { return (bool)obj.GetValue(ShowBorderProperty); } public static void SetShowBorder(DependencyObject obj, bool value) { obj.SetValue(ShowBorderProperty, value); } public static void OnShowBorderChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) { var grid = d as Grid; if ((bool)e.OldValue) grid.Loaded -= (s, arg) => { }; else { grid.Loaded += new RoutedEventHandler(GridLoaded); } } #endregion #region 线宽信息 public static readonly DependencyProperty LineThicknessProperty = DependencyProperty.RegisterAttached("LineThickness", typeof(double), typeof(GridOptions), new PropertyMetadata(1d,OnGridLineThicknessChanged)); public static double GetLineThickness(DependencyObject obj) { return (double)obj.GetValue(LineThicknessProperty); } public static void SetLineThickness(DependencyObject obj, double value) { obj.SetValue(LineThicknessProperty, value); } public static void OnGridLineThicknessChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) { } #endregion public static readonly DependencyProperty LineBrushProperty = DependencyProperty.RegisterAttached("LineBrush", typeof (Brush), typeof (GridOptions), new PropertyMetadata(Brushes.Gray, OnGridLineBrushChanged)); #region 线画刷问题 public static Brush GetLineBrush(DependencyObject obj) { var brush = (Brush)obj.GetValue(LineBrushProperty); return brush ?? Brushes.LightGray; } public static void SetLineBrush(DependencyObject obj, Brush value) { obj.SetValue(LineBrushProperty, value); } public static void OnGridLineBrushChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) { } #endregion private static void GridLoaded(object sender, RoutedEventArgs e) { #region 思路 /* * 1、覆盖所有单元格都要包围上边框。 * 2、边框线不能存在重复。每个单元格绘制【右下】部分,主体绘制右上部分 */ #endregion var grid = sender as Grid; var rowCount =Math.Max( 1,grid.RowDefinitions.Count); var columnCount = Math.Max(1, grid.ColumnDefinitions.Count); #region 初始化标准数组 int[,] flagArray = new int[rowCount, columnCount]; #endregion var controls = grid.Children; var count = controls.Count; var settingThickness = GetLineThickness(grid); var borderBrush = GetLineBrush(grid); for (int i = 0; i < count; i++) { var item = controls[i] as FrameworkElement; var row = Grid.GetRow((item)); var column = Grid.GetColumn(item); var rowSpan = Grid.GetRowSpan(item); var columnSpan = Grid.GetColumnSpan(item); for (int rowTemp = 0; rowTemp < rowSpan; rowTemp++) { for (int colTemp = 0; colTemp < columnSpan; colTemp++) { flagArray[rowTemp + row, colTemp + column] = 1; } } var border = CreateBorder(row, column, rowSpan, columnSpan, settingThickness); border.BorderBrush = borderBrush; grid.Children.RemoveAt(i); border.Child = item; grid.Children.Insert(i,border); } #region 整理为填充单元格 for (int i = 0; i < rowCount; i++) { for (int k = 0; k < columnCount; k++) { if (flagArray[i, k] == 0) { var border = CreateBorder(i, k, 1, 1, settingThickness); border.BorderBrush = borderBrush; grid.Children.Add(border); } } } #endregion } private static Border CreateBorder(int row,int column,int rowSpan,int columnSpan,double thickness) { var useThickness = new Thickness(0, 0, thickness, thickness); if (row == 0) useThickness.Top = thickness; if (column == 0) useThickness.Left = thickness; var border = new Border() { BorderThickness = useThickness, }; Grid.SetRow(border, row); Grid.SetColumn(border, column); Grid.SetRowSpan(border, rowSpan); Grid.SetColumnSpan(border, columnSpan); return border; } }
原文地址:https://blog.csdn.net/xuhuo1234/article/details/109846761