我現在做了一個 18*18 的正方形。我想用黑色填充正方形的第一個邊界，如圖所示，
我應該怎么辦？
public partial class Form1 : Form
{
private int XTILES = 25;
private int YTILES = 25;
private int TILELOCATION = 20;
Graphics g;
Pen pen;
public Form1()
{
InitializeComponent();
pen = new Pen(Color.Black);
}
private void DrawBoard()
{
g = panel.CreateGraphics();
for(int i = 0; i < 19; i )
{
g.DrawLine(pen, new Point(TILELOCATION i * XTILES, TILELOCATION),
new Point(TILELOCATION i * XTILES, TILELOCATION 18 * XTILES));
g.DrawLine(pen, new Point(TILELOCATION, TILELOCATION i * YTILES),
new Point(TILELOCATION 18 * YTILES, TILELOCATION i * YTILES));
}
}
private void panel_Paint(object sender, PaintEventArgs e)
{
base.OnPaint(e);
DrawBoard();
}
}
uj5u.com熱心網友回復：
有很多方法。這是其中之一：使用 FillRect 分別繪制頂部、左側、右側和底部邊緣。
Brush brush = new SolidBrush(Color.Black);
private void panel_Paint(object? sender, PaintEventArgs e)
{
DrawBoundary(e.Graphics);
}
void DrawBoundary(Graphics g)
{
g.FillRectangle(brush, ToGraphics(new Rectangle(0, 0, XTILES, 1)));
g.FillRectangle(brush, ToGraphics(new Rectangle(XTILES - 1, 0, 1, YTILES)));
g.FillRectangle(brush, ToGraphics(new Rectangle(0, YTILES - 1, XTILES, 1)));
g.FillRectangle(brush, ToGraphics(new Rectangle(0, 0, 1, YTILES - 1)));
}
public Rectangle ToGraphics(Rectangle r)
{
return new Rectangle(TILELOCATION r.X * TILESIZE, TILELOCATION r.Y * TILESIZE, r.Width * TILESIZE, r.Height * TILESIZE);
}
[添加-見評論]：
void DrawBoard(Graphics g)
{
for (int i = 0; i <= XTILES; i )
g.DrawLine(pen,
new Point(TILELOCATION i * TILESIZE, TILELOCATION),
new Point(TILELOCATION i * TILESIZE, TILELOCATION YTILES * TILESIZE - 1));
for (int i = 0; i <= YTILES; i )
g.DrawLine(pen,
new Point(TILELOCATION, TILELOCATION i * TILESIZE),
new Point(TILELOCATION XTILES * TILESIZE - 1, TILELOCATION i * TILESIZE));
}
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標籤：C＃表格gdi