Question

我有一个Grid（不是DataGrid，而是一个真正的网格），GridLines设置为True。如何更改网格线的颜色？在XAML中硬编码是可以的，因为它仅仅是出于开发原因。

<Grid ShowGridLines="True" />

Answer 1

抱歉，使用ShowGridLines无法完成 - 您需要设置包含元素的样式。

图表A：

MSDN文档说“只有虚线可用，因为此属性用作调试布局问题的设计工具，不适用于生产质量代码。如果您想要网格内的线条，请在网格中设置元素的样式有边界。“

附录B - WPF源代码：

注意Brushes.Blue和Brushes.Yellow在这个密封的内部类中进行了硬编码，System.Windows.Controls.Grid使用它来绘制线条。

来自Grid.cs

    /// <summary>
    /// Helper to render grid lines. 
    /// </summary>
    internal class GridLinesRenderer : DrawingVisual 
    { 
        /// <summary>
        /// Static initialization 
        /// </summary>
        static GridLinesRenderer()
        {
            s_oddDashPen = new Pen(Brushes.Blue, c_penWidth); 
            DoubleCollection oddDashArray = new DoubleCollection();
            oddDashArray.Add(c_dashLength); 
            oddDashArray.Add(c_dashLength); 
            s_oddDashPen.DashStyle = new DashStyle(oddDashArray, 0);
            s_oddDashPen.DashCap = PenLineCap.Flat; 
            s_oddDashPen.Freeze();

            s_evenDashPen = new Pen(Brushes.Yellow, c_penWidth);
            DoubleCollection evenDashArray = new DoubleCollection(); 
            evenDashArray.Add(c_dashLength);
            evenDashArray.Add(c_dashLength); 
            s_evenDashPen.DashStyle = new DashStyle(evenDashArray, c_dashLength); 
            s_evenDashPen.DashCap = PenLineCap.Flat;
            s_evenDashPen.Freeze(); 
        }

Answer 2

var T = Type.GetType("System.Windows.Controls.Grid+GridLinesRenderer," +
    " PresentationFramework, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35");

var GLR = Activator.CreateInstance(T);
GLR.GetType().GetField("s_oddDashPen", BindingFlags.Static | BindingFlags.NonPublic).SetValue(GLR, new Pen(Brushes.Black, 1.0));
GLR.GetType().GetField("s_evenDashPen", BindingFlags.Static | BindingFlags.NonPublic).SetValue(GLR, new Pen(Brushes.Black, 1.0));

myGrid.ShowGridLines = true;

Answer 3

这个答案不是如何实际更改GridLines，而是如何使它看起来像你以一种非常简单的方式。我相信其他人有更好的方法可以做到这一点，但这就是我如何完成显示我的网格线。

<Grid Height="115" Margin="0,0,0,0" ShowGridLines="False">
                                <Grid.ColumnDefinitions>
                                    <ColumnDefinition Width="220"/>
                                    <ColumnDefinition Width="220"/>
                                    <ColumnDefinition Width="200*"/> 
                                </Grid.ColumnDefinitions>
                                <Border Grid.Column="0" BorderBrush="White" BorderThickness="1">
                                </Border>
                                <Border Grid.Column="1" BorderBrush="White" BorderThickness="1">                      
                                </Border>
                                <Border Grid.Column="2" BorderBrush="White" BorderThickness="1">        
                                </Border>
                            </Grid>

为列定义或网格定义创建边框，并将Grid.Column属性设置为您希望的任何内容。然后您可以设置颜色，厚度或样式。甜美而简单。希望这有助于其他人！

以下是此网格的图片：

enter image description here

Answer 4

<Window.Resources>
   <SolidColorBrush x:Key="RedGridLine" Color="#FFFF4444" />
   <SolidColorBrush x:Key="BlueGridLine" Color="#554444FF"/>
</Window.Resources>

<my:DataGrid VerticalGridLinesBrush="{StaticResource RedGridLine}"
        HorizontalGridLinesBrush="{StaticResource BlueGridLine}" >
...
</my:DataGrid>

参考：http://social.msdn.microsoft.com/Forums/en-US/wpf/thread/0202b0dd-38d9-4ad7-8576-d115922aeeec/

Answer 5

igalk474's answer的扩展名，用作：

<FixedPage.Resources>
  <local:GridLinesRenderer x:Key="glr" StrokeColor="Black" StrokeWidth="1.0" />
</FixedPage.Resources>

...

<Grid ShowGridLines="True">
...
</Grid>

其中local是本地大会，而FixedPage是FrameworkElement。

using System;
using System.Reflection;
using System.Windows;
using System.Windows.Media;

namespace mynamespace.xaml {
    public class GridLinesRenderer : DependencyObject {

        public static readonly DependencyProperty StrokeWidthProperty = DependencyProperty.Register(
            "StrokeWidth", typeof(double), typeof(GridLinesRenderer), new PropertyMetadata(1.0, OnPropertyChanged)
        );

        public static readonly DependencyProperty StrokeColorProperty = DependencyProperty.Register(
            "StrokeColor", typeof(SolidColorBrush), typeof(GridLinesRenderer), new PropertyMetadata(Brushes.Black, OnPropertyChanged)
        );

        public double StrokeWidth {
            get { return (double)GetValue(StrokeWidthProperty); }
            set { SetValue(StrokeWidthProperty, value); }
        }

        public SolidColorBrush StrokeColor {
            get { return (SolidColorBrush)GetValue(StrokeColorProperty); }
            set { SetValue(StrokeColorProperty, value); }
        }

        public GridLinesRenderer() {
            OnPropertyChanged(this, new DependencyPropertyChangedEventArgs());
        }

        private static void OnPropertyChanged(DependencyObject source, DependencyPropertyChangedEventArgs e) {
            Type T = Type.GetType("System.Windows.Controls.Grid+GridLinesRenderer," +
                "PresentationFramework, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35");
            var glr = Activator.CreateInstance(T);
            Pen glrPen = new Pen(((GridLinesRenderer)source).StrokeColor, ((GridLinesRenderer)source).StrokeWidth);
            glr.GetType().GetField("s_oddDashPen", BindingFlags.Static | BindingFlags.NonPublic).SetValue(glr, glrPen);
            glr.GetType().GetField("s_evenDashPen", BindingFlags.Static | BindingFlags.NonPublic).SetValue(glr, glrPen);
        }

    }
}

如何在WPF中更改网格网格线的颜色？

5 个答案: