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相信大家在做WPF项目的时候，都会用到Grid这个布局控件，一般情况下，如果只是为了布局，那就不需要显示它的边框，但是也有特殊需求，如果把它当做表格来使用，那就需要为它添加实线边框。下面帖代码：
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
namespace WPFStart
为Grid添加的一个特殊功能，实线边框
public class
GridHelper
//边框的宽度
static double myBorderWidth = 1;
public static double GetBorderWidth(DependencyObject obj)
return (double)obj.GetValue(BorderWidthProperty);
public static void SetBorderWidth(DependencyObject obj, double
value)
obj.SetValue(BorderWidthProperty, value);
public static readonly DependencyProperty BorderWidthProperty
DependencyProperty.RegisterAttached("BorderWidth", typeof(double),
typeof(GridHelper), new
PropertyMetadata(OnBorderWidthChanged));
private static void OnBorderWidthChanged(DependencyObject d,
DependencyPropertyChangedEventArgs e)
myBorderWidth = (double)e.NewValue;
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 readonly DependencyProperty ShowBorderProperty
DependencyProperty.RegisterAttached("ShowBorder", typeof(bool),
typeof(GridHelper), new PropertyMetadata(OnShowBorderChanged));
//这是一个事件处理程序，需要手工编写，必须是静态方法
private static void OnShowBorderChanged(DependencyObject d,
DependencyPropertyChangedEventArgs e)
var grid = d as Grid;
if ((bool)e.OldValue)
grid.Loaded -= (s, arg) => { };
if ((bool)e.NewValue)
grid.Loaded += (s, arg) =>
//根据Grid的顶层子控件的个数去添加边框，同时考虑合并的情况
var controls = grid.Children;
var count = controls.Count;
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);
//设置边框线的颜色
var border = new Border();
border.BorderBrush = new SolidColorBrush(Colors.White);
if (row == grid.RowDefinitions.Count - 1 && column ==
grid.ColumnDefinitions.Count - 1)
border.BorderThickness = new Thickness(myBorderWidth);
else if (row == grid.RowDefinitions.Count - 1)
border.BorderThickness = new Thickness(myBorderWidth,
myBorderWidth, 0, 0);
else if (column == grid.ColumnDefinitions.Count - 1)
border.BorderThickness = new Thickness(myBorderWidth,
myBorderWidth, myBorderWidth, 0);
border.BorderThickness = new Thickness(myBorderWidth,
myBorderWidth,0, 0 );
Grid.SetRow(border, row);
Grid.SetColumn(border, column);
Grid.SetRowSpan(border, rowspan);
Grid.SetColumnSpan(border, columnspan);
grid.Children.Add(border);
在项目中新建这个类，在XAML页面引用设置属性时，需要添加
“xmlns:ext="clr-namespace:WPFGrid（项目名称）"“，“
ext:GridHelper.ShowBorder="true"”这里就是设置边框是否显示了。
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版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/huangli321456/article/details/80064509
