自己写的C#截图工具
自学C#差不多一星期，之前大一学习过C和C++，之后接触过学校组织的一星期java实习培训，想了想选择C#了。这几天宅宿舍天天写，参考各种资料终于写成了这个截图工具。跟QQ截图很像，不过没有自动选框功能和截图后涂鸦编辑功能。新手代码很乱。。附上核心代码。完整工程文件和源代码见这里 http://download.csdn.net/detail/justlovediaodaio/4620457环境VS2012 For Desktop，NetFramework4.5.
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace CatchScreen
{
//定义委托
public delegate void SetICS(bool isCatchScreen);
public partial class Catch : Form
{
//鼠标位置的枚举
private enum MouseLocation
{
LeftUpPoint,LeftDownPoint,RightUpPoint,RightDownPoint,LeftLine,RightLine,UpLine,DownLine,
InRectangle,OutOfRectangle
}
private MouseLocation mouseLocation;
//定义该委托的事件
public event SetICS SetICSEvent;
//截屏原始图片
private Bitmap originBmp;
//鼠标左键按下的坐标
private Point mouseDownPoint;
//调节截图框时的固定不动点
private Point fixedPoint;
//是否允许绘制矩形截图状态
private bool isDraw;
//截图完成状态
private bool isCatched;
//是否允许调节矩形框
private bool isAdjust;
//绘制的截图矩形框
private Rectangle rect;
public Catch()
{
InitializeComponent();
}
//将当前屏幕截图，显示到全屏无标题栏窗体上
private void Catch_Load(object sender, EventArgs e)
{
//设置截图状态为开始
SetICSEvent(true);
//隐藏窗体，保证截屏图片为当前屏幕而不是被窗体覆盖
this.Hide();
//以当前窗口大小（窗口默认最大化，即全屏）创建截屏空白图片
this.originBmp = new Bitmap(this.Width,this.Height );
//以截屏图片作为画板
using (Graphics gs = Graphics.FromImage(originBmp))
{
//复制当前屏幕到画板上，即将截屏图片的内容设置为当前屏幕
gs.CopyFromScreen(0, 0, 0, 0, this.Size);
}
//将截屏图片设为窗体背景
this.BackgroundImage = new Bitmap(this.originBmp);
//添加截屏时的黑色遮罩，即在窗体背景上绘制全屏半透明黑色填充矩形
using (Graphics blackgs = Graphics.FromImage(this.BackgroundImage))
{
using (SolidBrush backBrush = new SolidBrush(Color.FromArgb(100, 0, 0, 0)))
{
blackgs.FillRectangle(backBrush, 0, 0, this.Width, this.Height);
}
}
//显示窗体
this.Show();
//激活当前窗体，使之具有焦点。主要针对win8 Metro界面的截图。
this.Activate();
}
//右键点击动作
private void Catch_MouseClick(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Right)
{
//开始绘制矩形框前，即初始状态，直接退出截图
if (isCatched == false)
{
this.Close();
}
//若矩形框已绘制，设定状态为初始状态，设定矩形各参数为0，
//刷新窗体重绘，以清除已绘制的矩形，重新开始截图，即撤销功能。
else
{
this.isCatched = false;
this.isAdjust = false;
this.isDraw = false;
this.rect = new Rectangle(0, 0, 0, 0);
this.Refresh();
}
}
}
//鼠标左键按下开始截图
private void Catch_MouseDown(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
//未捕获时，设定状态为允许绘制矩形
if (isCatched == false)
{
this.isDraw = true;
}
else
{
//捕获完成后在矩形框内按下左键，设置状态为调节矩形框位置和大小
//为方便使用，矩形框内外以及边和顶点的判定都为目标附近
if (MousePosition.X > rect.Left - 3 && MousePosition.X < rect.Right + 3
&& MousePosition.Y > rect.Top - 3 && MousePosition.Y < rect.Bottom + 3)
{
this.isAdjust = true;
}
}
//记下鼠标左键按下的坐标,设置显示光标
this.CursorLocation();
this.mouseDownPoint = new Point(e.X, e.Y);
}
}
private void Catch_MouseMove(object sender, MouseEventArgs e)
{
//移动鼠标绘制矩形
if (this.isDraw == true)
{
//鼠标按下并移动设定状态为已捕获
this.isCatched = true;
//记录矩形左上角点的坐标
Point leftUpPoint = new Point(this.mouseDownPoint.X, this.mouseDownPoint.Y);
if (e.X < this.mouseDownPoint.X)
leftUpPoint.X = e.X;
if (e.Y < this.mouseDownPoint.Y)
leftUpPoint.Y = e.Y;
//获取矩形的长和宽
int wideth = Math.Abs(this.mouseDownPoint.X - e.X);
int height = Math.Abs(this.mouseDownPoint.Y - e.Y);
//防止分辨率为0的截图区域
if (wideth == 0)
++wideth;
if (height == 0)
++height;
//记录绘制的矩形
this.rect = new Rectangle(leftUpPoint.X, leftUpPoint.Y, wideth, height);
//刷新窗体，以触发OnPain事件重绘窗体
this.Refresh();
}
//调节矩形框
else
{
if (isCatched == true)
{
//捕获完成，按下左键前显示当鼠标在矩形框上时的形状
if (isAdjust == false)
{
this.CursorLocation();
}
else
{
//计算调节矩形框的大小和位置
Point leftUpPoint = new Point(this.fixedPoint.X, this.fixedPoint.Y);
if (e.X < this.fixedPoint.X)
leftUpPoint.X = e.X;
if (e.Y < this.fixedPoint.Y)
leftUpPoint.Y = e.Y;
int wideth = Math.Abs(this.fixedPoint.X - e.X);
int height = Math.Abs(this.fixedPoint.Y - e.Y);
switch (mouseLocation)
{
//校正以上计算的矩形框位置以及大小
case MouseLocation.InRectangle:
leftUpPoint.X = this.fixedPoint.X + e.X - this.mouseDownPoint.X;
leftUpPoint.Y = this.fixedPoint.Y + e.Y - this.mouseDownPoint.Y;
wideth = this.rect.Width;
height = this.rect.Height;
//防止矩形框移出屏幕外
if (leftUpPoint.X < 0)
leftUpPoint.X = 0;
if (leftUpPoint.Y < 0)
leftUpPoint.Y = 0;
if (leftUpPoint.X + wideth >= this.Width)
leftUpPoint.X = this.Width - wideth-1;
if (leftUpPoint.Y + height >= this.Height)
leftUpPoint.Y = this.Height - height-1;
break;
case MouseLocation.LeftLine:
case MouseLocation.RightLine:
leftUpPoint.Y = this.rect.Y;
height = this.rect.Height;
break;
case MouseLocation.UpLine:
case MouseLocation.DownLine:
leftUpPoint.X = this.rect.X;
wideth = this.rect.Width;
break;
}
//防止分辨率为0的截图区域
if (wideth == 0)
++wideth;
if (height == 0)
++height;
//改变矩形框，刷新重绘
this.rect = new Rectangle(leftUpPoint.X,leftUpPoint.Y, wideth, height);
this.Refresh();
}
}
}
}
--------------------编程问答--------------------
//重载OnPaint事件，窗体每次重绘所调用的函数
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
//防止窗体第一次显示时绘出分辨率显示
if (this.rect.Width != 0)
{
//向窗体添加画板，绘制矩形
Graphics gs = e.Graphics;
//绘制截屏图片上的矩形框选中部分到当前画板上的矩形框部分，以覆盖黑色遮罩
gs.DrawImage(this.originBmp, this.rect, this.rect, GraphicsUnit.Pixel);
//定义画笔
using (Pen linePen = new Pen(Color.FromArgb(255,0,174,255), 1))
{
//绘制矩形
gs.DrawRectangle(linePen, this.rect);
//绘出线条上的点
using (SolidBrush pointBrush = new SolidBrush(Color.FromArgb(255, 0, 174, 255)))
{
//顶点
gs.FillRectangle(pointBrush, this.rect.X - 2, this.rect.Y - 2, 4,4 );
gs.FillRectangle(pointBrush, this.rect.Right - 2, this.rect.Y - 2, 4, 4);
gs.FillRectangle(pointBrush, this.rect.X - 2, this.rect.Bottom - 2, 4, 4);
gs.FillRectangle(pointBrush, this.rect.Right - 2, this.rect.Bottom - 2, 4, 4);
//中点
gs.FillRectangle(pointBrush, this.rect.X - 2, (this.rect.Y + this.rect.Bottom)/2 - 2, 4, 4);
gs.FillRectangle(pointBrush, (this.rect.X + this.rect.Right)/2 - 2, this.rect.Y - 2, 4, 4);
gs.FillRectangle(pointBrush, (this.rect.X + this.rect.Right)/2 - 2, this.rect.Bottom - 2, 4, 4);
gs.FillRectangle(pointBrush, this.rect.Right - 2, (this.rect.Y + this.rect.Bottom)/2 - 2, 4, 4);
}
}
//定义分辨率文字显示背景画刷，ARGB值。
using (SolidBrush backBrush = new SolidBrush(Color.FromArgb(150, 0, 0, 0)))
{
//绘制分辨率文字背景
//靠近屏幕上方和右边缘调整背景绘图位置，避免超出屏幕范围
if (this.rect.Y < 16)
{
if(this.rect.X + 70 > this.Width - 71)
gs.FillRectangle(backBrush,this.rect.X - 71,this.rect.Y,70,15);
else
gs.FillRectangle(backBrush, this.rect.X, this.rect.Y, 70, 15);
}
else
{
if(this.rect.X > this.Width - 71)
gs.FillRectangle(backBrush,this.rect.X - 71,this.rect.Y - 16,70,15);
else
gs.FillRectangle(backBrush, this.rect.X, this.rect.Y - 16, 70, 15);
}
}
//定义绘制文字字体
using (Font drawFont = new Font("Arial", 9))
{
//定义分辨率文字画刷
using (SolidBrush drawBrush = new SolidBrush(Color.White))
{
//获取分辨率文字
string ratio = this.rect.Width.ToString() + " x " + rect.Height.ToString();
//绘制分辨率文字
if (this.rect.Y < 16)
{
if(this.rect.X > this.Width - 71)
gs.DrawString(ratio,drawFont,drawBrush,new Point (this.rect.X - 71,this.rect.Y));
else
gs.DrawString(ratio, drawFont, drawBrush, new Point(this.rect.X, this.rect.Y));
}
else
{
if(this.rect.X > this.Width - 71)
gs.DrawString(ratio,drawFont,drawBrush,new Point(this.rect.X - 71,this.rect.Y - 16));
else
gs.DrawString(ratio, drawFont, drawBrush, new Point(this.rect.X, this.rect.Y - 16));
}
}
}
}
}
--------------------编程问答--------------------
//重载OnPaint事件，窗体每次重绘所调用的函数
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
//防止窗体第一次显示时绘出分辨率显示
if (this.rect.Width != 0)
{
//向窗体添加画板，绘制矩形
Graphics gs = e.Graphics;
//绘制截屏图片上的矩形框选中部分到当前画板上的矩形框部分，以覆盖黑色遮罩
gs.DrawImage(this.originBmp, this.rect, this.rect, GraphicsUnit.Pixel);
//定义画笔
using (Pen linePen = new Pen(Color.FromArgb(255,0,174,255), 1))
{
//绘制矩形
gs.DrawRectangle(linePen, this.rect);
//绘出线条上的点
using (SolidBrush pointBrush = new SolidBrush(Color.FromArgb(255, 0, 174, 255)))
{
//顶点
gs.FillRectangle(pointBrush, this.rect.X - 2, this.rect.Y - 2, 4,4 );
gs.FillRectangle(pointBrush, this.rect.Right - 2, this.rect.Y - 2, 4, 4);
gs.FillRectangle(pointBrush, this.rect.X - 2, this.rect.Bottom - 2, 4, 4);
gs.FillRectangle(pointBrush, this.rect.Right - 2, this.rect.Bottom - 2, 4, 4);
//中点
gs.FillRectangle(pointBrush, this.rect.X - 2, (this.rect.Y + this.rect.Bottom)/2 - 2, 4, 4);
gs.FillRectangle(pointBrush, (this.rect.X + this.rect.Right)/2 - 2, this.rect.Y - 2, 4, 4);
gs.FillRectangle(pointBrush, (this.rect.X + this.rect.Right)/2 - 2, this.rect.Bottom - 2, 4, 4);
gs.FillRectangle(pointBrush, this.rect.Right - 2, (this.rect.Y + this.rect.Bottom)/2 - 2, 4, 4);
}
}
//定义分辨率文字显示背景画刷，ARGB值。
using (SolidBrush backBrush = new SolidBrush(Color.FromArgb(150, 0, 0, 0)))
{
//绘制分辨率文字背景
//靠近屏幕上方和右边缘调整背景绘图位置，避免超出屏幕范围
if (this.rect.Y < 16)
{
if(this.rect.X + 70 > this.Width - 71)
gs.FillRectangle(backBrush,this.rect.X - 71,this.rect.Y,70,15);
else
gs.FillRectangle(backBrush, this.rect.X, this.rect.Y, 70, 15);
}
else
{
if(this.rect.X > this.Width - 71)
gs.FillRectangle(backBrush,this.rect.X - 71,this.rect.Y - 16,70,15);
else
gs.FillRectangle(backBrush, this.rect.X, this.rect.Y - 16, 70, 15);
}
}
//定义绘制文字字体
using (Font drawFont = new Font("Arial", 9))
{
//定义分辨率文字画刷
using (SolidBrush drawBrush = new SolidBrush(Color.White))
{
//获取分辨率文字
string ratio = this.rect.Width.ToString() + " x " + rect.Height.ToString();
//绘制分辨率文字
if (this.rect.Y < 16)
{
if(this.rect.X > this.Width - 71)
gs.DrawString(ratio,drawFont,drawBrush,new Point (this.rect.X - 71,this.rect.Y));
else
gs.DrawString(ratio, drawFont, drawBrush, new Point(this.rect.X, this.rect.Y));
}
else
{
if(this.rect.X > this.Width - 71)
gs.DrawString(ratio,drawFont,drawBrush,new Point(this.rect.X - 71,this.rect.Y - 16));
else
gs.DrawString(ratio, drawFont, drawBrush, new Point(this.rect.X, this.rect.Y - 16));
}
}
}
}
}
--------------------编程问答--------------------
//放开鼠标左键，设置状态
private void Catch_MouseUp(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
//不允许绘制和调整
this.isDraw = false;
this.isAdjust = false;
}
}
//鼠标双击复制截图到剪贴板并存储
private void Catch_MouseDoubleClick(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left && isCatched == true)
{
//新建矩形大小的图片，并作为画板
Bitmap bmp = new Bitmap(rect.Width, rect.Height);
using (Graphics gs = Graphics.FromImage(bmp))
{
//从原始截屏图片originBmp上截取指定的矩形部分rect到图片画板bmp的指定部分，单位为像素。
gs.DrawImage(this.originBmp, new Rectangle(0, 0, this.rect.Width, this.rect.Height), this.rect, GraphicsUnit.Pixel);
}
//复制到剪贴板
Clipboard.SetImage(bmp);
SaveFile(bmp);
}
}
//储存图片
private void SaveFile(Bitmap bmp)
{
//用当前时间作为文件名
string time = DateTime.Now.ToString();
//去除时间中的非法字符
string filename = null;
foreach(char symbol in time)
{
if(symbol != '/' && symbol != ':' && symbol != ' ')
filename += symbol;
}
saveFileDialog1.FileName = "截图" + filename;
if (saveFileDialog1.ShowDialog() == DialogResult.OK)
{
//存储为jpeg或者png格式
switch (saveFileDialog1.FilterIndex)
{
case 0:
bmp.Save(saveFileDialog1.FileName, System.Drawing.Imaging.ImageFormat.Png);
break;
case 1:
bmp.Save(saveFileDialog1.FileName, System.Drawing.Imaging.ImageFormat.Jpeg);
break;
default:
bmp.Save(saveFileDialog1.FileName, System.Drawing.Imaging.ImageFormat.Jpeg);
break;
}
}
//退出截图
this.Close();
}
//窗口关闭时设置主窗口的截图状态标记
private void Catch_Closing(object sender, EventArgs e)
{
SetICSEvent(false);
}
//判定并记录鼠标与矩形框的位置关系，改变鼠标形状，并记录下矩形框上的一个标记点，
//用作计算调节矩形框时矩形框的位置及大小
private void CursorLocation ()
{
int mouseX = Control.MousePosition.X;
int mouseY = Control.MousePosition.Y;
//鼠标在矩形内
if (mouseX > rect.Left + 2 && mouseX < rect.Right - 2 && mouseY > rect.Top + 2 && mouseY < rect.Bottom - 2)
{
Cursor.Current = Cursors.SizeAll;
if (this.isAdjust == true)
{
this.mouseLocation = MouseLocation.InRectangle;
this.fixedPoint = new Point(this.rect.Left, this.rect.Top);
}
}
//鼠标在矩形外
else if(mouseX <rect.Left - 2 || mouseX > rect.Right + 2 || mouseY < rect.Top - 2 || mouseY > rect.Bottom + 2)
{
Cursor.Current = Cursors.Default;
this.mouseLocation = MouseLocation.OutOfRectangle;
}
//鼠标在矩形上
else
{
//鼠标在矩形的左边宽以及顶点上
if(mouseX > rect.Left - 3 && mouseX < rect.Left + 3)
{
if (mouseY > rect.Top - 3 && mouseY < rect.Top + 3)
{
Cursor.Current = Cursors.SizeNWSE;
if (this.isAdjust == true)
{
this.mouseLocation = MouseLocation.LeftUpPoint;
this.fixedPoint = new Point(this.rect.Right, this.rect.Bottom);
}
}
else if (mouseY > rect.Bottom - 3 && mouseY < rect.Bottom + 3)
{
Cursor.Current = Cursors.SizeNESW;
if (this.isAdjust == true)
{
this.mouseLocation = MouseLocation.LeftDownPoint;
this.fixedPoint = new Point(this.rect.Right, this.rect.Top);
}
}
else
{
Cursor.Current = Cursors.SizeWE;
if (this.isAdjust == true)
{
this.mouseLocation = MouseLocation.LeftLine;
this.fixedPoint = new Point(this.rect.Right, this.rect.Top);
}
}
}
//鼠标在矩形的右边宽以及顶点上
else if(mouseX > rect.Right - 3 && mouseX < rect.Right + 3)
{
if (mouseY == rect.Top)
{
Cursor.Current = Cursors.SizeNESW;
if (this.isAdjust == true)
{
this.mouseLocation = MouseLocation.RightUpPoint;
this.fixedPoint = new Point(this.rect.Left, this.rect.Bottom);
}
}
else if (mouseY > rect.Bottom - 3 && mouseY < rect.Bottom + 3)
{
Cursor.Current = Cursors.SizeNWSE;
if (this.isAdjust == true)
{
this.mouseLocation = MouseLocation.RightDownPoint;
this.fixedPoint = new Point(this.rect.Left, this.rect.Top);
}
}
else
{
Cursor.Current = Cursors.SizeWE;
if (this.isAdjust == true)
{
this.mouseLocation = MouseLocation.RightLine;
this.fixedPoint = new Point(this.rect.Left, this.rect.Top);
}
}
}
//鼠标在矩形的长上
else
{
if (mouseY > rect.Top - 3 && mouseY < rect.Top + 3)
{
Cursor.Current = Cursors.SizeNS;
if (this.isAdjust == true)
{
this.mouseLocation = MouseLocation.UpLine;
this.fixedPoint = new Point(this.rect.Left, this.rect.Bottom);
}
}
else
{
Cursor.Current = Cursors.SizeNS;
if (this.isAdjust == true)
{
this.mouseLocation = MouseLocation.DownLine;
this.fixedPoint = new Point(this.rect.Left, this.rect.Top);
}
}
}
}
}
//按下ESC键退出截图
private void Catch_KeyDown(object sender, KeyEventArgs e)
{
if (e.KeyValue == 27)
{
this.Close();
}
}
}
}
--------------------编程问答-------------------- 支持一下，不过希望你能突出重点，而不是什么代码都往上贴。
整理出核心代码，你的收获以及和大家分享的经验恐怕更好。 --------------------编程问答--------------------
--------------------编程问答-------------------- 代码可读性很差，你需要在一个团队里去提高自己 --------------------编程问答-------------------- 写的很好，就是代码太长了。代码最好分类、什么是事件、什么是方法。归整一下 --------------------编程问答-------------------- 屋顶上的女孩
再加一句 上代码的时候最好用上这个东西 不然代码多了看都懒得看 而且缩进也没有
--------------------编程问答--------------------
楼主插入源代码好了一点
补充：.NET技术 , C#
