2019独角兽企业重金招聘Python工程师标准>>> 
///
/// 为Grid添加外边框
///
public class GridHelper
{
//请注意：可以通过propa这个快捷方式生成下面三段代码
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) =>
{
//这种做法自动将控件移动到Border里面来
var controls = grid.Children;
var count = controls.Count;
for (int i = 0; i < count; i++)
{
var item = controls[i] as FrameworkElement;
var border = new Border()
{
BorderBrush = new SolidColorBrush(Colors.LightGray),
BorderThickness = new Thickness(1),
Padding = new Thickness(20)
};
var row = Grid.GetRow(item);
var column = Grid.GetColumn(item);
var rowspan = Grid.GetRowSpan(item);
var columnspan = Grid.GetColumnSpan(item);
Grid.SetRow(border, row);
Grid.SetColumn(border, column);
Grid.SetRowSpan(border, rowspan);
Grid.SetColumnSpan(border, columnspan);
grid.Children.RemoveAt(i);
border.Child = item;
grid.Children.Insert(i, border);
}
};
}
}
}
需要用的时候在网页的头部加上 ： xmlns:ext="clr-namespace:页面的名称"
在需要加边框的Grid中增加属性ext:GridHelper.ShowBorder="True"