Question

我需要使背景看起来像这样：

我找到了使用<DrawingBrush TileMode="Tile">的方法，但是不允许创建渐变，因为这会产生许多重复的正方形。也许有什么方法可以动态地做到这一点，而不是在xaml中？

Answer 1

我不得不做一些非常相似的事情，并选择用C＃动态创建一个网格，该方法在Canvas加载的事件上被调用。

“ max_value”是您希望网格成为的最大像素大小，我将我的像素设置为3500。

“ ScaleFactor”是线之间的间距/正方形的大小，我将我的值设置为15。

“画布”就是您也要应用网格的画布。

我确实必须提取代码并从一个较大的程序中对其进行调整，但是它仍然可以工作，但是我目前没有IDE对其进行测试。

class GridLine  //Declares a grid-line object
    {   //Declares a variety of different line lists, used for different parts of the grid.
        private List<Line> XGridline { get; set; } = new List<Line>();
        private List<Line> YGridline { get; set; } = new List<Line>();
        private Line[] Axis { get; set; } = new Line[2];

        //Used to draw the grid.
        public GridLine DrawGrid(int max_value, int scale_factor, Canvas canvas) //Draws the grid
        {
            int x = 0;
            int y = 0;

            while (x < max_value) // Used to draw lines from the center out to the far right.
            {
                YGridline.Add(new Line() {
                    Stroke = new SolidColorBrush(Colors.Black),
                    StrokeThickness = 2,
                    X1 = x,
                    Y1 = -max_value,
                    X2 = x,
                    Y2 = max_value
                });
                canvas.Children.Add(YGridline[YGridline.Count - 1]);
                x += scale_factor;
            }
            x = 0;
            y = 0;
            while (x > -max_value) //used to draw lines from the center to the far left.
            {
                YGridline.Add(new Line() {StrokeThickness = 2,
                    Stroke = new SolidColorBrush(Colors.Black),
                    X1 = x ,
                    Y1 = -max_value,
                    X2 = x,
                    Y2 = max_value
                });
                canvas.Children.Add(YGridline[YGridline.Count - 1]);

                x -= scale_factor;
            }
            y = 0;
            x = 0;
            while (y < max_value)   //used to draw lines from the center to the bottom
            {
                XGridline.Add(new Line() {
                    Stroke = new SolidColorBrush(Colors.Black),
                    StrokeThickness = 2,
                    X1 = -max_value,
                    Y1 = y,
                    X2 = max_value,
                    Y2 = y
                });
                canvas.Children.Add(XGridline[XGridline.Count - 1]);
                y += scale_factor;
            }
            y = 0;
            x = 0;
            while (y > -max_value)  //Used to draw lines from the center to the top.
            {
                XGridline.Add(new Line() {
                    Stroke = new SolidColorBrush(Colors.Black),
                    StrokeThickness = 2,
                    X1 = -max_value,
                    Y1 = y,
                    X2 = max_value,
                    Y2 = y
                });
                canvas.Children.Add(XGridline[XGridline.Count - 1]);
                y -= scale_factor;
            }
            //VERTICLE LINE- Y Axis
            Axis[0] = (new Line() { Stroke = new SolidColorBrush(Colors.Black), StrokeThickness = 3, X1 = 0, Y1 = -max_value, X2 = 0, Y2 = max_value });
            canvas.Children.Add(Axis[0]);

            //Horizontal line - X Axis
            Axis[1] = (new Line() { Stroke = new SolidColorBrush(Colors.Black), StrokeThickness = 3, X1 = -max_value, Y1 = 0, X2 = max_value, Y2 = 0 });
            canvas.Children.Add(Axis[1]);
            return this;
        }
    }

编辑： 如果您只想拥有渐变背景，为什么不将矩形设置为不具有透明填充，然后在其后设置渐变背景呢？我仍然建议您查看我的代码，因为根据您以后打算对网格进行的操作，您可能会发现实用地生成网格更加容易。

WPF以渐变为背景的重复线条

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