DrawPath和DrawRectangle之间的区别 [英] Difference between DrawPath and DrawRectangle

问题描述

大家好，



我在我的应用程序中使用Rectangle和graphicspath绘制线条，我在使用时面临绘图中宽度和高度的损失GraphicsPath而不是使用Rectangle。
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下面是重现我的问题的示例代码，

Hi All,

I am drawing lines using both Rectangle and graphicspath in my application and i am facing lose of width and height in drawing when using GraphicsPath rather than using Rectangle.

Below is the sample code which reproduces my issue,

protected override void OnPaint(PaintEventArgs e)
{
    int left = ClientRectangle.X + 40, right = ClientRectangle.Width -80;
    int bottom = ClientRectangle.Height - 80, top = ClientRectangle.Y + 40;
    int borderWidth = 10;

    Rectangle borderrectangle = new Rectangle(left, top, right, bottom);

    Pen pen = new Pen(Color.Black, borderWidth);

    //Draws lines using Rectangle.
     e.Graphics.DrawRectangle(pen, borderrectangle);

    Point[] points = new Point[]
    {
        new Point(left, top),
        new Point(right, top),
        new Point(right, bottom),
        new Point(left, bottom),
    };

    GraphicsPath path = new GraphicsPath();
    path.AddLines(points);
    path.CloseFigure();

    //Draws lines using Path.
    e.Graphics.DrawPath(pen, path);
}

这是图片，

Amal Raj U

Amal Raj U

推荐答案

Rectangle的构造函数确实期望with和height，而不是right和bottom。因此，DrawRectangle绘制一个更大的矩形，因为右下角位于（左+右，上+下）。虽然路径的右下角位于（右下角）。

The constructor of Rectangle does expect with and height, not right and bottom. So the DrawRectangle draws a larger rectangle, because bottom right corner is at (left+right, top+bottom). While the path has the bottom right corner at (right, bottom).

您可以通过创建矩形来解决此问题：new Rectangle（left，top，right - left，bottom - top） ;

You can fix this by creating rectangle as : new Rectangle(left, top, right - left, bottom - top);

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