我需要花一条直线不知道为什么会提示这个错误,希望能够给些处理方法。
Graphics g = new Graphics();
Pen p = new Pen(Color.Blue, 10);
g.DrawLine(p, 10, 10, 100, 100);
Graphics g = new Graphics();
Pen p = new Pen(Color.Blue, 10);
g.DrawLine(p, 10, 10, 100, 100);
Graphics g = Graphics.FromImage(image);
Pen p = new Pen(Color.Blue, 10);
g.DrawLine(p, 10, 10, 100, 100); 说名:
首先:你要用画笔画图的话,你要有东西可画,也就是说你要画在什么地方上
System.Drawing.Image image=new System.Drawing.Bitmap(100,100);//产生一个空白的图片
Graphics g = Graphics.FromImage(image);//在此图片上绘制 Pen p = new Pen(Color.Blue, 10);//产生画笔
g.DrawLine(p, 10, 10, 100, 100); //在上面画图