实例介绍
【实例简介】
【实例截图】
【核心代码】
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Drawing.Imaging;
using XBC;
using System.IO;
namespace XBC
{
/// <summary>
/// 用于截图的类
/// </summary>
public partial class frmShow : Form
{
/// <summary>
/// 构造函数
/// </summary>
public frmShow() {
InitializeComponent();
BackgroundImage = ControlComputer.CaptrueAllScreen(false);
backImage = BackgroundImage as Bitmap;
Init();
}
FromState _State;
Point one;
Point two;
Rectangle rec;
Bitmap backImage;
Bitmap result;
/// <summary>
/// 获取得到的图片的Bitmap对象
/// </summary>
public Bitmap Result {
get { return result; }
}
#region 方法区
private void Init() {
ChangLocation();
Stream s = new MemoryStream(Properties.Resources.a);
// byte[] bs =;
//for (int i = 0; i < bs.Length - 1; i) {
// s.WriteByte(bs[i]);
//}
Cursor = new Cursor(s);
_State = FromState.Start;
lblStata.Text = "请单击选择第一个点";
}
private void ChangLocation() {
pnlInfo.Left = this.Width - pnlInfo.Width;
pnlInfo.Top = this.Height - pnlInfo.Height;
}
private void DrawRectangle() {
Graphics g = this.CreateGraphics();
g.DrawRectangle(Pens.Red, rec);
}
private void ShowInfo() {
lblLeft.Text = "";
lblTop.Text = "";
lblWidth.Text = "";
lblHeight.Text = "";
}
private void ShowInfo(Rectangle value) {
lblLeft.Text = value.Left.ToString();
lblTop.Text = value.Top.ToString();
lblWidth.Text = value.Width.ToString();
lblHeight.Text = value.Height.ToString();
}
private void ShowImage(Rectangle temp) {
if (temp.Width != 0 && temp.Height != 0) {
Graphics g = picBig.CreateGraphics();
g.DrawImage(backImage.Clone(temp, PixelFormat.DontCare), 0, 0, picBig.Width, picBig.Height);
}
}
//刷新区域
private void KeyInvalidate(Rectangle rec) {
Rectangle temp = rec;
temp.Height ;
temp.Width ;
Invalidate(temp);
}
#endregion
private void frmShow_SizeChanged(object sender, EventArgs e) {
ChangLocation();
}
private void pnlInfo_MouseEnter(object sender, EventArgs e) {
if (pnlInfo.Top == this.Height - 300) {
pnlInfo.Top = 0;
}
else {
pnlInfo.Top = this.Height - 300;
}
}
private void frmShow_MouseMove(object sender, MouseEventArgs e) {
if (_State == FromState.Start || _State == FromState.One) {
Rectangle temp = new Rectangle();
temp.X = e.Location.X - 10;
temp.Y = e.Location.Y - 10;
temp.Width = 20;
temp.Height = 20;
CheckTempRectangle(ref temp);
ShowImage(temp);
}
}
//选择图像
private void frmShow_MouseDown(object sender, MouseEventArgs e) {
if (_State == FromState.Start) {
if (e.Button == MouseButtons.Left) {
one = e.Location;
lblLeft.Text = one.X.ToString();
lblTop.Text = one.Y.ToString();
lblStata.Text = "已选择第一个点";
_State ;
}
else if (e.Button == MouseButtons.Right) {
this.Close();
}
}
else if (_State == FromState.One) {
if (e.Button == MouseButtons.Left) {
two = e.Location;
rec.X = Math.Min(one.X, two.X);
rec.Y = Math.Min(one.Y, two.Y);
rec.Width = Math.Abs(one.X - two.X);
rec.Height = Math.Abs(one.Y - two.Y);
ShowInfo(rec);
lblStata.Text = "已选择了区域";
DrawRectangle();
ShowImage(rec);
_State ;
}
else if (e.Button == MouseButtons.Right) {
_State--;
lblStata.Text = "已选择第一个点";
}
}
else if (_State == FromState.Two) {
if (e.Button == MouseButtons.Right) {
rec.Height ;
rec.Width ;
Invalidate(rec);
_State -= 2;
ShowInfo();
lblStata.Text = "请单击选择第一个点";
}
}
}
//改变位置和大小
private void frmShow_KeyDown(object sender, KeyEventArgs e) {
if (e.KeyCode == Keys.Up) {
KeyInvalidate(rec);
Update();
if (e.Shift) {
rec.Height--;
}
else {
rec.Y--;
}
DrawRectangle();
}
else if (e.KeyCode == Keys.Down) {
KeyInvalidate(rec);
Update();
if (e.Shift) {
rec.Height ;
}
else {
rec.Y ;
}
DrawRectangle();
}
else if (e.KeyCode == Keys.Left) {
KeyInvalidate(rec);
Update();
if (e.Shift) {
rec.Width--;
}
else {
rec.X--;
}
DrawRectangle();
}
else if (e.KeyCode == Keys.Right) {
KeyInvalidate(rec);
Update();
if (e.Shift) {
rec.Width ;
}
else {
rec.X ;
}
DrawRectangle();
}
else if (e.KeyCode == Keys.Enter) {
if (rec.Width != 0 && rec.Height != 0) {
result = backImage.Clone(rec, PixelFormat.DontCare);
//frmSelect objSelect = new frmSelect();
//DialogResult d = objSelect.ShowDialog();
//if (d == DialogResult.Yes) {
// Clipboard.SetImage(b);
//}
//else if (d == DialogResult.No) {
// if (saveFileDialog1.ShowDialog() == DialogResult.OK) {
// b.Save(saveFileDialog1.FileName,ImageFormat.Bmp);
// }
//}
}
this.Close();
this.DialogResult = DialogResult.OK;
return;
}
CheckRectangle();
ShowInfo(rec);
ShowImage(rec);
}
private void CheckRectangle() {
if (rec.X < 0)
rec.X = 0;
if (rec.Y < 0)
rec.Y = 0;
if (rec.X > 1280)
rec.X = 1280;
if (rec.Y > 800)
rec.Y = 800;
if (rec.Width < 0)
rec.Width = 0;
if (rec.Height < 0)
rec.Height = 0;
if (rec.Width rec.X > 1280)
rec.Width = 1280 - rec.X;
if (rec.Height rec.Y > 1280)
rec.Height = 800 - rec.Y;
}
private void CheckTempRectangle(ref Rectangle value) {
if (value.X < 0)
value.X = 0;
if (value.Y < 0)
value.Y = 0;
if (value.Width value.X > 1280)
value.Width = 1280 - value.X;
if (value.Height value.Y > 800)
value.Height = 800 - value.Y;
}
}
internal enum FromState
{
/// <summary>
/// 表示窗体此时刚进入截图状态
/// </summary>
Start,
/// <summary>
/// 表示现在已选定了一个点
/// </summary>
One,
/// <summary>
/// 表示现在已选定了二个点
/// </summary>
Two,
}
}
标签： windows api
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