C#实现屏幕截图,跟着鼠标显示图片
需要两个picturebox,一个放图片【转载博客园 ，代码未测试】完整代码如下
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Data.OleDb;
using System.Xml;
namespace Test
{
public partial class Form1 : Form
{
private bool MouseIsDown = false;
private int _x, _y;
private Rectangle MouseRect = Rectangle.Empty;
public Form1()
{
InitializeComponent();
}
private void ResizeToRectangle(Point p)
{
DrawRectangle();
MouseRect.Width = p.X - MouseRect.Left;
MouseRect.Height = p.Y - MouseRect.Top;
DrawRectangle();
}
private void DrawRectangle()
{
Rectangle rect = this.RectangleToScreen(MouseRect);
ControlPaint.DrawReversibleFrame(rect, Color.White, FrameStyle.Dashed);
}
private void DrawStart(Point StartPoint)
{
barkPictureBox.Capture = true;
Cursor.Clip = this.RectangleToScreen(new Rectangle(0, 0, ClientSize.Width, ClientSize.Height));
MouseRect = new Rectangle(StartPoint.X, StartPoint.Y, 0, 0);
}
private void button1_Click(object sender, EventArgs e)
{
}
void barkPictureBox_MouseUp(object sender, MouseEventArgs e)
{
barkPictureBox.Capture = false;
Cursor.Clip = Rectangle.Empty;
MouseIsDown = false;
DrawRectangle();
if (MouseRect.X == 0 || MouseRect.Y == 0 || MouseRect.Width == 0 || MouseRect.Height == 0)//如果区域有一个是0就返回
{
}
else
{
///代码
}
MouseRect = Rectangle.Empty;
int sx = _x < e.X ? _x : e.X;
int sy = _y < e.Y ? _y : e.Y;
int w = Math.Abs(_x - e.X);
int h = Math.Abs(_y - e.Y);
Graphics g = Graphics.FromHwnd(pictureBox2.Handle);
g.Clear(pictureBox2.BackColor);
g.DrawImage(barkPictureBox.Image, new Rectangle(0, 0, w, h), sx, sy, w, h, GraphicsUnit.Pixel);
}
void barkPictureBox_MouseMove(object sender, MouseEventArgs e)
{
if (MouseIsDown) ResizeToRectangle(new Point(e.X + barkPictureBox.Location.X, e.Y + barkPictureBox.Location.Y));
}
void barkPictureBox_MouseDown(object sender, MouseEventArgs e)
{
_x = e.X;
_y = e.Y;
MouseIsDown = true;
DrawStart(new Point(e.X + barkPictureBox.Location.X, e.Y + barkPictureBox.Location.Y));
}
private void Form1_Load(object sender, EventArgs e)
{
barkPictureBox.MouseDown += new MouseEventHandler(barkPictureBox_MouseDown);
barkPictureBox.MouseMove += new MouseEventHandler(barkPictureBox_MouseMove);
barkPictureBox.MouseUp += new MouseEventHandler(barkPictureBox_MouseUp);
}
}
}
运行没反应啊！
页:
[1]