我正在努力修改这个C＃应用程序。代码来自：http://www.codeproject.com/Articles/485883/Create-your-own-Snipping-Tool ..它对我不起作用..我不明白内存流和imageFormat以及破折号风格的错误...我有一个艰难的时间可以帮助吗？
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace test
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
pictureBox1.MouseDown += new MouseEventHandler(pictureBox1_MouseDown);
pictureBox1.MouseMove += new MouseEventHandler(pictureBox1_MouseMove);
}
private void button2_Click(object sender, EventArgs e)
{
}
private void pictureBox1_Click(object sender, EventArgs e)
{
}
private void Form1_Load(object sender, EventArgs e)
{
//Hide the Form
this.Hide();
//Create the Bitmap
Bitmap printscreen = new Bitmap(Screen.PrimaryScreen.Bounds.Width,
Screen.PrimaryScreen.Bounds.Height);
//Create the Graphic Variable with screen Dimensions
Graphics graphics = Graphics.FromImage(printscreen as Image);
//Copy Image from the screen
graphics.CopyFromScreen(0, 0, 0, 0, printscreen.Size);
//Create a temporal memory stream for the image
using (MemoryStream s = new MemoryStream())
{
//save graphic variable into memory
printscreen.Save(s, ImageFormat.Bmp);
pictureBox1.Size = new System.Drawing.Size(this.Width, this.Height);
//set the picture box with temporary stream
pictureBox1.Image = Image.FromStream(s);
}
//Show Form
this.Show();
//Cross Cursor
Cursor = Cursors.Cross;
}
int selectX;
int selectY;
int selectWidth;
int selectHeight;
public Pen selectPen;
//This variable control when you start the right click
bool start = false;
private void pictureBox1_MouseMove(object sender, MouseEventArgs e)
{
//validate if there is an image
if (pictureBox1.Image == null)
return;
//validate if right-click was trigger
if (start)
{
//refresh picture box
pictureBox1.Refresh();
//set corner square to mouse coordinates
selectWidth = e.X - selectX;
selectHeight = e.Y - selectY;
//draw dotted rectangle
pictureBox1.CreateGraphics().DrawRectangle(selectPen,
selectX, selectY, selectWidth, selectHeight);
}
}
private void pictureBox1_MouseDown(object sender, MouseEventArgs e)
{
//validate when user right-click
if (!start)
{
if (e.Button == System.Windows.Forms.MouseButtons.Left)
{
//starts coordinates for rectangle
selectX = e.X;
selectY = e.Y;
selectPen = new Pen(Color.Red, 1);
selectPen.DashStyle = DashStyle.DashDotDot;
}
//refresh picture box
pictureBox1.Refresh();
//start control variable for draw rectangle
start = true;
}
else
{
//validate if there is image
if (pictureBox1.Image == null)
return;
//same functionality when mouse is over
if (e.Button == System.Windows.Forms.MouseButtons.Left)
{
pictureBox1.Refresh();
selectWidth = e.X - selectX;
selectHeight = e.Y - selectY;
pictureBox1.CreateGraphics().DrawRectangle(selectPen, selectX,
selectY, selectWidth, selectHeight);
}
start = false;
//function save image to clipboard
SaveToClipboard();
}
}
private void SaveToClipboard()
{
//validate if something selected
if (selectWidth > 0)
{
Rectangle rect = new Rectangle(selectX, selectY, selectWidth, selectHeight);
//create bitmap with original dimensions
Bitmap OriginalImage = new Bitmap(pictureBox1.Image, pictureBox1.Width, pictureBox1.Height);
//create bitmap with selected dimensions
Bitmap _img = new Bitmap(selectWidth, selectHeight);
//create graphic variable
Graphics g = Graphics.FromImage(_img);
//set graphic attributes
g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
g.PixelOffsetMode = System.Drawing.Drawing2D.PixelOffsetMode.HighQuality;
g.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
g.DrawImage(OriginalImage, 0, 0, rect, GraphicsUnit.Pixel);
//insert image stream into clipboard
Clipboard.SetImage(_img);
}
//End application
Application.Exit();
}
}
}