组件/控件开发
关于c#画线
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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Drawing.Drawing2D;
namespace WindowsFormsApplication3
{
public partial class Form1 : Form
{
private PointF current;
private PointF movepf;
public Form1()
{
InitializeComponent();
}
private void pictureBox1_MouseClick(object sender, MouseEventArgs e)
{
current = e.Location;
}
private void pictureBox1_MouseMove(object sender, MouseEventArgs e)
{
movepf = e.Location;
Invalidate();
}
protected override void OnPaint(PaintEventArgs e)
{
Bitmap mp = new Bitmap(pictureBox1.Width, pictureBox1.Height);
Pen pen = new Pen(Color.Blue);
SolidBrush drawBrush = new SolidBrush(Color.Black);
using (Graphics g = Graphics.FromImage(mp))
{
g.DrawImage(mp, pictureBox1.ClientRectangle.X, pictureBox1.ClientRectangle.Y);
g.DrawLine(pen, current, movepf);
PointF pt1 = new PointF();
pt1.X = (current.X + movepf.X) / 2;
pt1.Y = (current.Y + movepf.Y) / 2;
g.DrawString("12345", this.Font, drawBrush, pt1);
using (Graphics gg = this.CreateGraphics())
{
gg.DrawImage(mp, pictureBox1.ClientRectangle.X, pictureBox1.ClientRectangle.Y);
}
}
base.OnPaint(e);
}
}
}
[img=C:\Users\Administrator\Desktop\1.png]
[/img]
就是想知道 我这样画线， 就一个窗体一个picturebox ，我想在picturebox里面画线,可是线条老出在form上面 怎么办呢
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