实例介绍
【实例简介】
【实例截图】
【核心代码】
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Runtime.InteropServices;
namespace CaptureScreen
{
/// <summary>
/// CaptureScreenForm 的摘要说明。
/// </summary>
public class CaptureScreenForm : System.Windows.Forms.Form
{
private System.Windows.Forms.PictureBox picbox;
private System.Windows.Forms.Button exitBtn;
private System.Windows.Forms.Button aboutBtn;
private System.Windows.Forms.Button ClearBtn;
private System.Windows.Forms.Button saveBtn;
private System.Windows.Forms.Button fullScreenBtn;
private System.Windows.Forms.Button mouseCaptureBtn;
public static Image image = null ;
private System.Windows.Forms.Panel panel1;
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.Container components = null;
public CaptureScreenForm()
{
//
// Windows 窗体设计器支持所必需的
//
InitializeComponent();
//
// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
//
}
/// <summary>
/// 清理所有正在使用的资源。
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (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.picbox = new System.Windows.Forms.PictureBox();
this.fullScreenBtn = new System.Windows.Forms.Button();
this.mouseCaptureBtn = new System.Windows.Forms.Button();
this.ClearBtn = new System.Windows.Forms.Button();
this.saveBtn = new System.Windows.Forms.Button();
this.aboutBtn = new System.Windows.Forms.Button();
this.exitBtn = new System.Windows.Forms.Button();
this.panel1 = new System.Windows.Forms.Panel();
this.panel1.SuspendLayout();
this.SuspendLayout();
//
// picbox
//
this.picbox.Location = new System.Drawing.Point(0, 40);
this.picbox.Name = "picbox";
this.picbox.Size = new System.Drawing.Size(680, 312);
this.picbox.SizeMode = System.Windows.Forms.PictureBoxSizeMode.AutoSize;
this.picbox.TabIndex = 0;
this.picbox.TabStop = false;
//
// fullScreenBtn
//
this.fullScreenBtn.Location = new System.Drawing.Point(0, 0);
this.fullScreenBtn.Name = "fullScreenBtn";
this.fullScreenBtn.Size = new System.Drawing.Size(96, 32);
this.fullScreenBtn.TabIndex = 1;
this.fullScreenBtn.Text = "全屏截取";
this.fullScreenBtn.Click = new System.EventHandler(this.fullScreenBtn_Click);
//
// mouseCaptureBtn
//
this.mouseCaptureBtn.Location = new System.Drawing.Point(120, 0);
this.mouseCaptureBtn.Name = "mouseCaptureBtn";
this.mouseCaptureBtn.Size = new System.Drawing.Size(96, 32);
this.mouseCaptureBtn.TabIndex = 2;
this.mouseCaptureBtn.Text = "鼠标截取";
this.mouseCaptureBtn.Click = new System.EventHandler(this.mouseCaptureBtn_Click);
//
// ClearBtn
//
this.ClearBtn.Location = new System.Drawing.Point(240, 0);
this.ClearBtn.Name = "ClearBtn";
this.ClearBtn.Size = new System.Drawing.Size(88, 32);
this.ClearBtn.TabIndex = 3;
this.ClearBtn.Text = "清除截取图片";
this.ClearBtn.Click = new System.EventHandler(this.ClearBtn_Click);
//
// saveBtn
//
this.saveBtn.Location = new System.Drawing.Point(352, 0);
this.saveBtn.Name = "saveBtn";
this.saveBtn.Size = new System.Drawing.Size(96, 32);
this.saveBtn.TabIndex = 4;
this.saveBtn.Text = "保存截取图片";
this.saveBtn.Click = new System.EventHandler(this.saveBtn_Click);
//
// aboutBtn
//
this.aboutBtn.Location = new System.Drawing.Point(472, 0);
this.aboutBtn.Name = "aboutBtn";
this.aboutBtn.Size = new System.Drawing.Size(96, 32);
this.aboutBtn.TabIndex = 5;
this.aboutBtn.Text = "关 于";
this.aboutBtn.Click = new System.EventHandler(this.aboutBtn_Click);
//
// exitBtn
//
this.exitBtn.Location = new System.Drawing.Point(592, 0);
this.exitBtn.Name = "exitBtn";
this.exitBtn.Size = new System.Drawing.Size(88, 32);
this.exitBtn.TabIndex = 6;
this.exitBtn.Text = "退 出";
this.exitBtn.Click = new System.EventHandler(this.exitBtn_Click);
//
// panel1
//
this.panel1.Controls.Add(this.fullScreenBtn);
this.panel1.Controls.Add(this.mouseCaptureBtn);
this.panel1.Controls.Add(this.ClearBtn);
this.panel1.Controls.Add(this.saveBtn);
this.panel1.Controls.Add(this.aboutBtn);
this.panel1.Controls.Add(this.exitBtn);
this.panel1.Location = new System.Drawing.Point(0, 0);
this.panel1.Name = "panel1";
this.panel1.Size = new System.Drawing.Size(680, 32);
this.panel1.TabIndex = 7;
//
// CaptureScreenForm
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.AutoScroll = true;
this.ClientSize = new System.Drawing.Size(696, 358);
this.Controls.Add(this.panel1);
this.Controls.Add(this.picbox);
this.Name = "CaptureScreenForm";
this.Text = "截取屏幕";
this.panel1.ResumeLayout(false);
this.ResumeLayout(false);
}
#endregion
/// <summary>
/// 应用程序的主入口点。
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new CaptureScreenForm());
}
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint (e);
if(image != null)
{
this.picbox.Image = image;
}
else
{
this.picbox.Image = null;
this.picbox.Refresh();
}
}
// 引用API
[System.Runtime.InteropServices.DllImportAttribute("gdi32.dll")]
public static extern bool BitBlt(
IntPtr hdcDest, //目标设备的句柄
int nXDest, // 目标对象的左上角的X坐标
int nYDest, // 目标对象的左上角的X坐标
int nWidth, // 目标对象的矩形的宽度
int nHeight, // 目标对象的矩形的长度
IntPtr hdcSrc, // 源设备的句柄
int nXSrc, // 源对象的左上角的X坐标
int nYSrc, // 源对象的左上角的X坐标
System.Int32 dwRop // 光栅的操作值
);
private void exitBtn_Click(object sender, System.EventArgs e)
{
Application.Exit();
}
private void aboutBtn_Click(object sender, System.EventArgs e)
{
MessageBox.Show("Code by Star in 2006-3-17,E_mail: ygh_01@163.com ,thank you to use this.");
}
private void ClearBtn_Click(object sender, System.EventArgs e)
{
CaptureScreenForm.image = null;
this.Invalidate();
}
private void saveBtn_Click(object sender, System.EventArgs e)
{
SaveFileDialog saveImageDialog = new SaveFileDialog();
saveImageDialog.Title = "Capture screen image save dialog";
saveImageDialog.Filter= @"jpeg|*.jpg|bmp|*.bmp|gif|*.gif";
if(saveImageDialog.ShowDialog() == DialogResult.OK)
{
string fileName = saveImageDialog.FileName.ToString();
if(fileName != "" && fileName != null)
{
string fileExtName = fileName.Substring(fileName.LastIndexOf(".") 1).ToString();
System.Drawing.Imaging.ImageFormat imgformat = null;
if(fileExtName!="")
{
switch(fileExtName)
{
case "jpg":
imgformat = System.Drawing.Imaging.ImageFormat.Jpeg;
break;
case "bmp":
imgformat = System.Drawing.Imaging.ImageFormat.Bmp;
break;
case "gif":
imgformat = System.Drawing.Imaging.ImageFormat.Gif;
break;
default:
MessageBox.Show("只能存取为: jpg,bmp,gif 格式");
break;
}
}
//默认保存为JPG格式
if(imgformat == null)
{
imgformat = System.Drawing.Imaging.ImageFormat.Jpeg;
}
try
{
CaptureScreenForm.image.Save(fileName,imgformat);
MessageBox.Show("图片已经成功保存!~~");
}
catch
{
MessageBox.Show("保存失败,你还没有截取过图片或已经清空图片!");
}
}
}
}
private void fullScreenBtn_Click(object sender, System.EventArgs e)
{
CaptureScreenForm.image = windowFullScreen();
picbox.Image = CaptureScreenForm.image;
}
public static Bitmap windowFullScreen()
{
//建立屏幕Graphics
Graphics grpScreen = Graphics.FromHwnd(IntPtr.Zero);
//根据屏幕大小建立位图
Bitmap bitmap = new Bitmap(Screen.PrimaryScreen.Bounds.Width,Screen.PrimaryScreen.Bounds.Height,grpScreen);
//建立位图相关Graphics
Graphics grpBitmap = Graphics.FromImage(bitmap);
//建立屏幕上下文
IntPtr hdcScreen = grpScreen.GetHdc();
//建立位图上下文
IntPtr hdcBitmap = grpBitmap.GetHdc();
//将屏幕捕获保存在图位中
BitBlt(hdcBitmap,0,0,bitmap.Width,bitmap.Height,hdcScreen,0,0,0x00CC0020);
//关闭位图句柄
grpBitmap.ReleaseHdc(hdcBitmap);
//关闭屏幕句柄
grpScreen.ReleaseHdc(hdcScreen);
//释放位图对像
grpBitmap.Dispose();
//释放屏幕对像
grpScreen.Dispose();
//返回捕获位图
return bitmap;
}
private void mouseCaptureBtn_Click(object sender, System.EventArgs e)
{
MouseCaptureForm mouseCapture = new MouseCaptureForm();
mouseCapture.Show();
}
}
}
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