如何在WPF中更改网格网格线的颜色？

Question

我有一个Grid(不是DataGrid,但是一个真正的网格),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,无法使用ShowGridLines完成 - 您需要设置包含的元素的样式.

图表A:

MSDN文档说"只有虚线可用,因为此属性旨在用作调试布局问题的设计工具,而不是用于生产质量代码.如果您想要网格内的线条,请将网格中的元素设置为具有边框".

图表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,而是如何让它看起来像你以一种非常简单的方式做的.我相信其他人有更好的方法来做到这一点,但这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值.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!

这是这个网格的图像: