什么行为触发DrawItem事件?最好举个例子说明,怎么做就会执行该市建立的代码?还有下面这段代码执行了却看不到线,为什么?
Graphics g =this.CreateGraphics();
Pen p = new Pen(Color.Black);
p.DashStyle =System.Drawing.Drawing2D.DashStyle.Solid;
p.Width = 3;
g.DrawLine(p, 0, 0, 100, 100);
Graphics g =this.CreateGraphics();
Pen p = new Pen(Color.Black);
p.DashStyle =System.Drawing.Drawing2D.DashStyle.Solid;
p.Width = 3;
g.DrawLine(p, 0, 0, 100, 100);
为什么不能使用this.CreateGraphics()方法?
但在属性中要设置this.listBox1.DrawMode = System.Windows.Forms.DrawMode.OwnerDrawFixed; //以listbox为例.