求关于自绘的思路或是代码！！

[shanying_0]

就是类似与vs设计器。就是一点直线这个button。我可以在窗口上画一个直线，
一点矩形，我可以在窗口上画一个矩形！还有其他的。就是类似这样的功能的东西。
求一个思路做法，最好详细点，
有代码参考就更好了！！！大家积极发言呀。

！！！！！顶着有分！！！

[CraxyMouse]

http://blog.csdn.net/dunao/archive/2008/10/22/3124257.aspx
看看我写的这个吧!
可以满足你的要求!

[周公]

在Paint事件里写绘制代码，以下是绘制圆形按钮的代码。

private void roundButton_Paint(object sender, 
    System.Windows.Forms.PaintEventArgs e)
{

    System.Drawing.Drawing2D.GraphicsPath buttonPath = 
        new System.Drawing.Drawing2D.GraphicsPath();

    // Set a new rectangle to the same size as the button's 
    // ClientRectangle property.
    System.Drawing.Rectangle newRectangle = roundButton.ClientRectangle;

    // Decrease the size of the rectangle.
    newRectangle.Inflate(-10, -10);
    
    // Draw the button's border.
    e.Graphics.DrawEllipse(System.Drawing.Pens.Black, newRectangle);

    // Increase the size of the rectangle to include the border.
    newRectangle.Inflate( 1,  1);

    // Create a circle within the new rectangle.
    buttonPath.AddEllipse(newRectangle);
            
    // Set the button's Region property to the newly created 
    // circle region.
    roundButton.Region = new System.Drawing.Region(buttonPath);

}

[simonezhlx]

GDI+就可以满足你的要求，自己去封装对应的图形类。代码自己搞定吧

[yilunduyue]

重载窗体的paint事件，至于绘图直线，椭圆等基本的图形gdi+都有实现！！！

[cja03]

正式的做法是封装自己的图形对象。
如果要求不高，可以这样做：

        //这里只有线，其它的自己添加
        enum Action
        {
            None,
            Line
        }
                
        Action currentAction = Action.None;//当前命令

        GraphicsPath gp = new GraphicsPath();//存诸图形，可以一并显示(红色)
        GraphicsPath tempGP = new GraphicsPath();//临时，在画时的显示(蓝色)

        private void buttonLine_Click(object sender, EventArgs e)//点击了画线按钮
        {
            this.currentAction = Action.Line;
        }

        private void buttonClear_Click(object sender, EventArgs e)//点击了清除按钮
        {
            gp.Reset();
            tempGP.Reset();
            this.Invalidate();
        }

        Point mouseDownPoint = new Point();//鼠标按下时的点
        private void Form1_MouseDown(object sender, MouseEventArgs e)
        {
            if (e.Button != MouseButtons.Left || this.currentAction == Action.None)
                return;

            switch (this.currentAction)
            {
                case Action.None:
                    break;
                case Action.Line:
                    mouseDownPoint.X = e.X;
                    mouseDownPoint.Y = e.Y;
                    break;
                default:
                    break;
            }
        }

        //随着鼠标的位置改变，正在画的图形也会跟着改，把它写到tempGP
        private void Form1_MouseMove(object sender, MouseEventArgs e)
        {
            if (e.Button != MouseButtons.Left || this.currentAction == Action.None)
                return;

            tempGP.Reset();
            switch (this.currentAction)
            {
                case Action.None:
                    break;
                case Action.Line:
                    tempGP.AddLine(mouseDownPoint.X, mouseDownPoint.Y, e.X, e.Y);
                    this.Invalidate();
                    break;
                default:
                    break;
            }
        }

        //图形确定，加入gp
        private void Form1_MouseUp(object sender, MouseEventArgs e)
        {
            if (e.Button != MouseButtons.Left || this.currentAction == Action.None)
                return;

            switch (this.currentAction)
            {
                case Action.None:
                    break;
                case Action.Line:
                    gp.AddLine(mouseDownPoint.X, mouseDownPoint.Y, e.X, e.Y);
                    gp.CloseFigure();
                    tempGP.Reset();
                    this.Invalidate();
                    break;
                default:
                    break;
            }
        }

        private void Form1_Paint(object sender, PaintEventArgs e)
        {
            e.Graphics.SmoothingMode = SmoothingMode.AntiAlias;

            e.Graphics.DrawPath(Pens.Red, gp);

            e.Graphics.DrawPath(Pens.Blue, tempGP);
        }

[shanying_0]

大家顶呀，顶也有分的

[abcyzq]

顶！我使劲帮楼主顶！

[palmax]

ding

[shanying_0]

不要沉了。顶呀

[hake303]

5楼写得比较详细了