namespace Message { partial class Form3 { /// <summary> /// Required designer variable. /// </summary> private System.ComponentModel.IContainer components = null; /// <summary> /// Clean up any resources being used. /// </summary> /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param> protected override void Dispose(bool disposing) { if (disposing && (components != null)) { components.Dispose(); } base.Dispose(disposing); } #region Windows Form Designer generated code /// <summary> /// Required method for Designer support - do not modify /// the contents of this method with the code editor. /// </summary> private void InitializeComponent() { this.saveFileDialog1 = new System.Windows.Forms.SaveFileDialog(); this.SuspendLayout(); // // Form3 // this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F); this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font; this.ClientSize = new System.Drawing.Size(353, 347); this.Cursor = System.Windows.Forms.Cursors.Cross; this.Name = "Form3"; this.Text = "Form3"; this.Load += new System.EventHandler(this.Form3_Load); this.MouseUp += new System.Windows.Forms.MouseEventHandler(this.Form3_MouseUp); this.MouseDoubleClick += new System.Windows.Forms.MouseEventHandler(this.Form3_DoubleClick); this.MouseDown += new System.Windows.Forms.MouseEventHandler(this.Form3_MouseDown); this.MouseMove += new System.Windows.Forms.MouseEventHandler(this.Form3_MouseMove); this.ResumeLayout(false); } #endregion private System.Windows.Forms.SaveFileDialog saveFileDialog1; } }
using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; namespace Message { public partial class Form3 : Form { private bool down = false; private Point firstPoint; private Pen p = new Pen(Color.Red); private Graphics gra; private Rectangle rectangle;//存储用户截取的矩形 private FormChat f4; public Form3(FormChat f4) { InitializeComponent(); this.f4 = f4; } private void Form3_Load(object sender, EventArgs e) { Image img = new Bitmap(Screen.AllScreens[0].Bounds.Width, Screen.AllScreens[0].Bounds.Height);//创建一个和屏幕同样大小的图像 Graphics g = Graphics.FromImage(img);//绘制这个图像 //将屏幕绘制到此图像,第一,二个Point是屏幕要截取的左上角的坐标和绘制到图像的左上角的坐标 g.CopyFromScreen(new Point(0, 0), new Point(0, 0), Screen.AllScreens[0].Bounds.Size); this.BackgroundImage = img; this.FormBorderStyle = FormBorderStyle.None; this.Bounds = Screen.PrimaryScreen.Bounds; gra = this.CreateGraphics();//主要为了用户截取方便 } private void Form3_MouseDown(object sender, MouseEventArgs e) { if (e.Button == MouseButtons.Left) { down = true; firstPoint = e.Location; } } private void Form3_MouseUp(object sender, MouseEventArgs e) { if (e.Button == MouseButtons.Left) { down = false; } if (e.Button == MouseButtons.Middle) { this.Close(); } } private void Form3_MouseMove(object sender, MouseEventArgs e) { if (down) { gra.DrawImage(this.BackgroundImage, 0, 0); rectangle = new Rectangle(Math.Min(firstPoint.X, e.X), Math.Min(e.Y, firstPoint.Y), Math.Abs(e.X - firstPoint.X), Math.Abs(e.Y - firstPoint.Y)); gra.DrawRectangle(p, rectangle); } } private void Form3_DoubleClick(object sender, MouseEventArgs e) { if (rectangle.Width != 0 && rectangle.Height != 0) { gra.DrawImage(this.BackgroundImage, 0, 0); Image im = new Bitmap(rectangle.Width, rectangle.Height); Graphics g = Graphics.FromImage(im); g.CopyFromScreen(rectangle.Location, new Point(0, 0), rectangle.Size); if (((MouseEventArgs)e).Button == MouseButtons.Left) { Clipboard.Clear(); Clipboard.SetImage(im); this.f4.Copy(); this.Close(); } } } } }