C# Graphics.DrawString加背景色

妳在繪制字符串之前可以使用Graphics的MeasureString方法測量它的尺寸再繪制壹個相應大小的矩形就行了，如下

Graphics g = this.CreateGraphics();

Font font = new Font("宋體", 9f);

PointF pointF = new PointF(10, 10);

SizeF sizeF = g.MeasureString("Hello World!", font);

g.FillRectangle(Brushes.White, new RectangleF(pointF, sizeF));

g.DrawString("Hello World!", font, Brushes.Black, pointF);

g.Dispose();

font.Dispose();