c# - 实时调整表格大小的矩形？

Question

下面是下面的矩形:

当我调整表单大小时，我需要这个矩形来匹配表单的大小。

改变矩形的宽度时，不要影响它在表单中的可见性。

我正在使用以下内容:

注意:

我手动制作了矩形，但如果您已经准备好矩形，那就更好了!

public Form1()
{
    InitializeComponent();
    this.Paint += Form1_Paint;
    this.rectangles = new Dictionary<string, Rectangle>();
    this.sizeScreen = this.Size;
    this.sizeRectangles = new Size(8, 8);
    this.brush = new SolidBrush(Color.Red);
    FillLeft();
    FillRight();
    FillUp();
    FillDown();
}

private Size sizeScreen;
private Size sizeRectangles;
private SolidBrush brush;
private Dictionary<string, Rectangle> rectangles;
private void FillLeft()
{
    Rectangle rectangle = new Rectangle()
    {
        Height = this.sizeScreen.Height,
        Width = this.sizeRectangles.Width,
        X = 0,
        Y = this.sizeRectangles.Height
    };
    this.rectangles.Add("left", rectangle);
}
private void FillRight()
{
    Rectangle rectangle = new Rectangle()
    {
        Height = this.sizeScreen.Height,
        Width = this.sizeRectangles.Width,
        X = this.sizeScreen.Width - (this.sizeRectangles.Width * 5),
        Y = this.sizeRectangles.Height
    };
    this.rectangles.Add("right", rectangle);
}
private void FillUp()
{
    Rectangle rectangle = new Rectangle()
    {
        Height = this.sizeRectangles.Height,
        Width = this.sizeScreen.Width,
        X = 0,
        Y = this.sizeRectangles.Height
    };
    this.rectangles.Add("up", rectangle);
}
private void FillDown()
{
    Rectangle rectangle = new Rectangle()
    {
        Height = this.sizeRectangles.Height,
        Width = this.sizeScreen.Width,
        X = 0,
        Y = this.sizeScreen.Height - (this.sizeRectangles.Height * 11)
    };
    this.rectangles.Add("down", rectangle);
}

private void Form1_Paint(object sender, PaintEventArgs e)
{
    for (int i = 0; i < this.rectangles.Count; i++)
    {
        e.Graphics.FillRectangles(this.brush, this.rectangles.Values.ToArray());
    }
}

我想在调整大小时在窗体上设置矩形

这是我创建矩形的方式，但它并没有停留在屏幕上，我不知道要调整它的大小

Answer 1

我认为这会简化您要做的事情:

const int PenWidth = 10;

private void Form1_Paint(object sender, PaintEventArgs e)
{
    Rectangle r = this.ClientRectangle;
    Pen pen = new Pen(Color.Red, PenWidth);
    e.Graphics.DrawRectangle(pen, r);
}

您甚至可以添加边距:

const int PenWidth = 10;
const int PenMargin = 10;

private void Form1_Paint(object sender, PaintEventArgs e)
{
    Rectangle r = this.ClientRectangle;
    r.Inflate(-PenMargin, -PenMargin);
    Pen pen = new Pen(Color.Red, PenWidth);
    e.Graphics.DrawRectangle(pen, r);
}

为了防止痕迹(Wyck 建议):

private void Form1_Resize(object sender, EventArgs e)
{
    Invalidate();
}