C#使用Graphics畫圓寫字

畫填充圓：         

Graphics gra = this.pictureBox1.CreateGraphics();

gra.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;

Brush bush = new SolidBrush(Color.Green);//填充的顏色

gra.FillEllipse(bush, 10, 10, 100, 100);//畫填充橢圓的方法，x坐標、y坐標、寬、高，如果是100，則半徑為50

畫圓圈：

Graphics gra = this.pictureBox1.CreateGraphics();

gra.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;

Pen pen = new Pen(Color.Pink);//畫筆顏色                                

gra.DrawEllipse(pen, 250, 10, 100, 100);//畫橢圓的方法，x坐標、y坐標、寬、高，如果是100，則半徑為50

 

寫字：

Graphics gra = this.pictureBox1.CreateGraphics();

Font myFont = new Font("宋體", 60, FontStyle.Bold);             

Brush bush = new SolidBrush(Color.Red);//填充的顏色

gra.DrawString("堵塞！", myFont, bush, 100, 100);

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