using System; using System.Collections.Generic; using System.Text; using System.Drawing; using System.Drawing.Imaging; using System.Windows.Forms;namespace ConsoleApplication1 { class Program { static void Main(string[] args) { //获得当前屏幕的分辨率 Screen scr = Screen.PrimaryScreen; Rectangle rc = scr.Bounds; int iWidth = rc.Width; int iHeight = rc.Height; //创建一个和屏幕一样大的Bitmap Image myImage = new Bitmap(iWidth, iHeight); //从一个继承自Image类的对象中创建Graphics对象 Graphics g = Graphics.FromImage(myImage); //抓屏并拷贝到myimage里 g.CopyFromScreen(new Point(0, 0), new Point(0, 0), new Size(iWidth, iHeight)); //保存为文件 myImage.Save(@"c:/1.jpeg"); } } }
建议楼主结合楼上的方法和MouseDown事件来做
Catch.cs文件using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms;namespace test { public partial class Catch : Form { public Catch() { InitializeComponent(); } #region 用户变量 private Point DownPoint = Point.Empty;//记录鼠标按下坐标,用来确定绘图起点 private bool CatchFinished = false;//用来表示是否截图完成 private bool CatchStart = false;//表示截图开始 private Bitmap originBmp;//用来保存原始图像 private Rectangle CatchRect;//用来保存截图的矩形 #endregion private void Catch_Load(object sender, EventArgs e) { this.SetStyle(ControlStyles.OptimizedDoubleBuffer | ControlStyles.AllPaintingInWmPaint | ControlStyles.UserPaint, true); this.UpdateStyles(); //以上两句是为了设置控件样式为双缓冲,这可以有效减少图片闪烁的问题,关于这个大家可以自己去搜索下 originBmp = new Bitmap(this.BackgroundImage);//BackgroundImage为全屏图片,我们另用变量来保存全屏图片 } //鼠标右键点击结束截图 private void Catch_MouseClick(object sender, MouseEventArgs e) { if (e.Button == MouseButtons.Right) { this.DialogResult = DialogResult.OK; this.Close(); } } //鼠标左键按下时动作 private void Catch_MouseDown(object sender, MouseEventArgs e) { if (e.Button == MouseButtons.Left) { if (!CatchStart) {//如果捕捉没有开始 CatchStart = true; DownPoint = new Point(e.X, e.Y);//保存鼠标按下坐标 } } } private void Catch_MouseMove(object sender, MouseEventArgs e) { if (CatchStart) {//如果捕捉开始 Bitmap destBmp = (Bitmap)originBmp.Clone();//新建一个图片对象,并让它与原始图片相同 Point newPoint = new Point(DownPoint.X, DownPoint.Y);//获取鼠标的坐标 Graphics g = Graphics.FromImage(destBmp);//在刚才新建的图片上新建一个画板 Pen p = new Pen(Color.Blue, 1); int width = Math.Abs(e.X - DownPoint.X), height = Math.Abs(e.Y - DownPoint.Y);//获取矩形的长和宽 if (e.X < DownPoint.X) { newPoint.X = e.X; } if (e.Y < DownPoint.Y) { newPoint.Y = e.Y; } CatchRect = new Rectangle(newPoint, new Size(width, height));//保存矩形 g.DrawRectangle(p, CatchRect);//将矩形画在这个画板上 g.Dispose();//释放目前的这个画板 p.Dispose(); Graphics g1 = this.CreateGraphics();//重新新建一个Graphics类 //如果之前那个画板不释放,而直接g=this.CreateGraphics()这样的话无法释放掉第一次创建的g,因为只是把地址转到新的g了.如同string一样 g1 = this.CreateGraphics();//在整个全屏窗体上新建画板 g1.DrawImage(destBmp, new Point(0, 0));//将刚才所画的图片画到这个窗体上 //这个也可以属于二次缓冲技术,如果直接将矩形画在窗体上,会造成图片抖动并且会有无数个矩形. g1.Dispose(); destBmp.Dispose();//要及时释放,不然内存将会被大量消耗 } } private void Catch_MouseUp(object sender, MouseEventArgs e) { if (e.Button == MouseButtons.Left) { if (CatchStart) { CatchStart = false; CatchFinished = true; } } } //鼠标双击事件,如果鼠标位于矩形内,则将矩形内的图片保存到剪贴板中 private void Catch_MouseDoubleClick(object sender, MouseEventArgs e) { if (e.Button == MouseButtons.Left&&CatchFinished) { if (CatchRect.Contains(new Point(e.X, e.Y))) { Bitmap CatchedBmp = new Bitmap(CatchRect.Width, CatchRect.Height);//新建一个于矩形等大的空白图片 Graphics g = Graphics.FromImage(CatchedBmp); g.DrawImage(originBmp, new Rectangle(0, 0, CatchRect.Width, CatchRect.Height), CatchRect, GraphicsUnit.Pixel); //把orginBmp中的指定部分按照指定大小画在画板上 Clipboard.SetImage(CatchedBmp);//将图片保存到剪贴板 g.Dispose(); CatchFinished = false; this.BackgroundImage = originBmp; CatchedBmp.Dispose(); this.DialogResult = DialogResult.OK; this.Close(); } } } } } Catch .Designer.cs namespace test { partial class Catch { /// <summary> /// 必需的设计器变量。 /// </summary> private System.ComponentModel.IContainer components = null; /// <summary> /// 清理所有正在使用的资源。 /// </summary> /// <param name="disposing">如果应释放托管资源,为 true;否则为 false。</param> protected override void Dispose(bool disposing) { if (disposing && (components != null)) { components.Dispose(); } base.Dispose(disposing); } #region Windows 窗体设计器生成的代码 /// <summary> /// 设计器支持所需的方法 - 不要 /// 使用代码编辑器修改此方法的内容。 /// </summary> private void InitializeComponent() { this.SuspendLayout(); // // Catch // this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F); this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font; this.ClientSize = new System.Drawing.Size(656, 542); this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None; this.Name = "Catch"; this.Text = "Catch"; this.WindowState = System.Windows.Forms.FormWindowState.Maximized; this.Load += new System.EventHandler(this.Catch_Load); this.MouseUp += new System.Windows.Forms.MouseEventHandler(this.Catch_MouseUp); this.MouseDoubleClick += new System.Windows.Forms.MouseEventHandler(this.Catch_MouseDoubleClick); this.MouseClick += new System.Windows.Forms.MouseEventHandler(this.Catch_MouseClick); this.MouseDown += new System.Windows.Forms.MouseEventHandler(this.Catch_MouseDown); this.MouseMove += new System.Windows.Forms.MouseEventHandler(this.Catch_MouseMove); this.ResumeLayout(false); } #endregion } }
using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;
using System.Drawing.Imaging;
using System.Windows.Forms;namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
//获得当前屏幕的分辨率
Screen scr = Screen.PrimaryScreen;
Rectangle rc = scr.Bounds;
int iWidth = rc.Width;
int iHeight = rc.Height;
//创建一个和屏幕一样大的Bitmap
Image myImage = new Bitmap(iWidth, iHeight);
//从一个继承自Image类的对象中创建Graphics对象
Graphics g = Graphics.FromImage(myImage);
//抓屏并拷贝到myimage里
g.CopyFromScreen(new Point(0, 0), new Point(0, 0), new Size(iWidth, iHeight));
//保存为文件
myImage.Save(@"c:/1.jpeg"); } }
}
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;namespace test
{
public partial class Catch : Form
{
public Catch()
{
InitializeComponent();
}
#region 用户变量
private Point DownPoint = Point.Empty;//记录鼠标按下坐标,用来确定绘图起点
private bool CatchFinished = false;//用来表示是否截图完成
private bool CatchStart = false;//表示截图开始
private Bitmap originBmp;//用来保存原始图像
private Rectangle CatchRect;//用来保存截图的矩形
#endregion private void Catch_Load(object sender, EventArgs e)
{
this.SetStyle(ControlStyles.OptimizedDoubleBuffer | ControlStyles.AllPaintingInWmPaint | ControlStyles.UserPaint, true);
this.UpdateStyles();
//以上两句是为了设置控件样式为双缓冲,这可以有效减少图片闪烁的问题,关于这个大家可以自己去搜索下
originBmp = new Bitmap(this.BackgroundImage);//BackgroundImage为全屏图片,我们另用变量来保存全屏图片
}
//鼠标右键点击结束截图
private void Catch_MouseClick(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Right)
{
this.DialogResult = DialogResult.OK;
this.Close();
}
}
//鼠标左键按下时动作
private void Catch_MouseDown(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
if (!CatchStart)
{//如果捕捉没有开始
CatchStart = true;
DownPoint = new Point(e.X, e.Y);//保存鼠标按下坐标
}
}
}
private void Catch_MouseMove(object sender, MouseEventArgs e)
{
if (CatchStart)
{//如果捕捉开始
Bitmap destBmp = (Bitmap)originBmp.Clone();//新建一个图片对象,并让它与原始图片相同
Point newPoint = new Point(DownPoint.X, DownPoint.Y);//获取鼠标的坐标
Graphics g = Graphics.FromImage(destBmp);//在刚才新建的图片上新建一个画板
Pen p = new Pen(Color.Blue, 1);
int width = Math.Abs(e.X - DownPoint.X), height = Math.Abs(e.Y - DownPoint.Y);//获取矩形的长和宽
if (e.X < DownPoint.X)
{
newPoint.X = e.X;
}
if (e.Y < DownPoint.Y)
{
newPoint.Y = e.Y;
}
CatchRect = new Rectangle(newPoint, new Size(width, height));//保存矩形
g.DrawRectangle(p, CatchRect);//将矩形画在这个画板上
g.Dispose();//释放目前的这个画板
p.Dispose();
Graphics g1 = this.CreateGraphics();//重新新建一个Graphics类
//如果之前那个画板不释放,而直接g=this.CreateGraphics()这样的话无法释放掉第一次创建的g,因为只是把地址转到新的g了.如同string一样
g1 = this.CreateGraphics();//在整个全屏窗体上新建画板
g1.DrawImage(destBmp, new Point(0, 0));//将刚才所画的图片画到这个窗体上
//这个也可以属于二次缓冲技术,如果直接将矩形画在窗体上,会造成图片抖动并且会有无数个矩形.
g1.Dispose();
destBmp.Dispose();//要及时释放,不然内存将会被大量消耗 }
}
private void Catch_MouseUp(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
if (CatchStart)
{
CatchStart = false;
CatchFinished = true; }
}
}
//鼠标双击事件,如果鼠标位于矩形内,则将矩形内的图片保存到剪贴板中
private void Catch_MouseDoubleClick(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left&&CatchFinished)
{
if (CatchRect.Contains(new Point(e.X, e.Y)))
{
Bitmap CatchedBmp = new Bitmap(CatchRect.Width, CatchRect.Height);//新建一个于矩形等大的空白图片
Graphics g = Graphics.FromImage(CatchedBmp);
g.DrawImage(originBmp, new Rectangle(0, 0, CatchRect.Width, CatchRect.Height), CatchRect, GraphicsUnit.Pixel);
//把orginBmp中的指定部分按照指定大小画在画板上
Clipboard.SetImage(CatchedBmp);//将图片保存到剪贴板
g.Dispose();
CatchFinished = false;
this.BackgroundImage = originBmp;
CatchedBmp.Dispose();
this.DialogResult = DialogResult.OK;
this.Close();
}
}
}
}
}
Catch .Designer.cs
namespace test
{
partial class Catch
{
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.IContainer components = null; /// <summary>
/// 清理所有正在使用的资源。
/// </summary>
/// <param name="disposing">如果应释放托管资源,为 true;否则为 false。</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
} #region Windows 窗体设计器生成的代码 /// <summary>
/// 设计器支持所需的方法 - 不要
/// 使用代码编辑器修改此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.SuspendLayout();
//
// Catch
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(656, 542);
this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
this.Name = "Catch";
this.Text = "Catch";
this.WindowState = System.Windows.Forms.FormWindowState.Maximized;
this.Load += new System.EventHandler(this.Catch_Load);
this.MouseUp += new System.Windows.Forms.MouseEventHandler(this.Catch_MouseUp);
this.MouseDoubleClick += new System.Windows.Forms.MouseEventHandler(this.Catch_MouseDoubleClick);
this.MouseClick += new System.Windows.Forms.MouseEventHandler(this.Catch_MouseClick);
this.MouseDown += new System.Windows.Forms.MouseEventHandler(this.Catch_MouseDown);
this.MouseMove += new System.Windows.Forms.MouseEventHandler(this.Catch_MouseMove);
this.ResumeLayout(false); } #endregion }
}
http://topic.csdn.net/u/20090911/14/5614a16e-ab08-4106-901e-e8dcc5cd1fa3.html?36476
Image img = new Bitmap(R.Width, R.Height);
Graphics G = Graphics.FromImage(img);
G.CopyFromScreen(new Point(0, 0), new Point(0, 0), new Size(R.Width, R.Height));。
IntPtr dc = G.GetHdc();
G.ReleaseHdc(dc);
G.Dispose();
img .Save("c:\\a.jpg");
或
private static extern bool BitBlt(IntPtr hdcDest,int nXDest,int nYDest,int nWidth,int nHeight,IntPtr hdcSrc,int nXSrc,int nYSrc,Int32 dwrop);http://topic.csdn.net/u/20090911/14/5614a16e-ab08-4106-901e-e8dcc5cd1fa3.html
用Api的也不一定能抓下来,解决方法。