WPF Grid布局自带的属性没有边框

1、头部引入​

xmlns:ext="clr-namespace:TS.HY.Manage"

2​、Grid设置属性

ext:GridHelper.ShowBorder="True"

ext:GridHelper.GridLineThickness="1"

ext:GridHelper.GridLineBrush="black">

​3、GridHelper源码

public class GridHelper

{

public static readonly DependencyProperty ShowBorderProperty =

DependencyProperty.RegisterAttached("ShowBorder", typeof(bool), typeof(GridHelper),

new PropertyMetadata(OnShowBorderChanged));

public static readonly DependencyProperty GridLineThicknessProperty =

DependencyProperty.RegisterAttached("GridLineThickness", typeof(double), typeof(GridHelper),

new PropertyMetadata(OnGridLineThicknessChanged));

public static readonly DependencyProperty GridLineBrushProperty =

DependencyProperty.RegisterAttached("GridLineBrush", typeof(Brush), typeof(GridHelper),

new PropertyMetadata(OnGridLineBrushChanged));

#region ShowBorder

public static bool GetShowBorder(DependencyObject obj)

{

return (bool)obj.GetValue(ShowBorderProperty);

}

public static void SetShowBorder(DependencyObject obj, bool value)

{

obj.SetValue(ShowBorderProperty, value);

}

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 += new RoutedEventHandler(GridLoaded);

}

}

#endregion

#region GridLineThickness

public static double GetGridLineThickness(DependencyObject obj)

{

return (double)obj.GetValue(GridLineThicknessProperty);

}

public static void SetGridLineThickness(DependencyObject obj, double value)

{

obj.SetValue(GridLineThicknessProperty, value);

}

private static void OnGridLineThicknessChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)

{

}

#endregion

#region GridLineBrush

public static Brush GetGridLineBrush(DependencyObject obj)

{

Brush brush = (Brush)obj.GetValue(GridLineBrushProperty);

return brush == null ? Brushes.LightGray : brush;

}

public static void SetGridLineBrush(DependencyObject obj, Brush value)

{

obj.SetValue(GridLineBrushProperty, value);

}

private static void OnGridLineBrushChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)

{

}

#endregion

private static void GridLoaded(object sender, RoutedEventArgs e)

{

Grid grid = sender as Grid;

var row_count = grid.RowDefinitions.Count;

var column_count = grid.ColumnDefinitions.Count;

#region 支持grid cell元素与边框距离设置，但是方法是将cell内元素放到border中，先删除，再添加！

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);

var settingThickness = GetGridLineThickness(grid);

Thickness thickness = new Thickness(settingThickness / 2);

if (row == 0)

thickness.Top = settingThickness;

if (row + rowspan == row_count)

thickness.Bottom = settingThickness;

if (column == 0)

thickness.Left = settingThickness;

if (column + columnspan == column_count)

thickness.Right = settingThickness;

var border = new Border()

{

BorderBrush = GetGridLineBrush(grid),

BorderThickness = thickness,

Padding = new Thickness(20)

};

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);

}

#endregion

}

}

​

​

转自：http://www.cnblogs.com/baijiakai/archive/2012/08/23/2652158.html​