c# 图片浏览器
来源：互联网 发布：java游戏引擎 编辑：程序博客网 时间：2024/05/20 15:10
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; using System.IO; using System.Diagnostics; using System.Management;namespace 图片浏览器 { public partial class GetPicture : Form { public GetPicture() { InitializeComponent(); } private string folderDirPath = null; //图片文件夹目录 private string picDirPath = null; //图片路径 private List<string> imagePathList = new List<string>(); //获取列表图片路径 private int index = 0; //获取选中列表图片序号 Point oldCursorPosition = new Point(); //原始位置 Point Position = new Point(0,0); //默认打开位置 private void GetPicture_Load(object sender, EventArgs e) { pictureBox.SendToBack(); //防止图片放大或者缩小后挡住btn } /// <summary> 打开图片 /// /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void btnOpenPicture_Click(object sender, EventArgs e) { pictureBox.Location = Position; try { if (openFileDialog.ShowDialog() == DialogResult.OK) { picDirPath = openFileDialog.FileName; pictureBox.Image = Image.FromFile(picDirPath); ; } } catch (Exception msg) { throw msg; } if (openFileDialog.FileName != "") { Directory.SetCurrentDirectory(Directory.GetParent(picDirPath).FullName); folderDirPath = Directory.GetCurrentDirectory(); ShowPicture(); } } /// <summary> 打开图片文件夹 /// /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void btnOpenPicList_Click(object sender, EventArgs e) { pictureBox.Location = Position; btnNext.Enabled = true; btnPrevious.Enabled = true; try { FolderBrowserDialog folderBrowserDialog = new FolderBrowserDialog(); DialogResult result = folderBrowserDialog.ShowDialog(); if (result == DialogResult.OK) { folderDirPath = folderBrowserDialog.SelectedPath; ShowPicture(); //默认显示第一张照片 this.pictureBox.Image = Image.FromFile(imagePathList[0]); } } //错误提示 catch (Exception msg) { MessageBox.Show("没有找到图片"); throw msg; } } /// <summary> 图片显示到 ListView 中 /// /// </summary> private void ShowPicture() { //打开图片花费时间 Stopwatch sw = new Stopwatch(); sw.Start(); //获取目录与子目录 DirectoryInfo dir = new DirectoryInfo(folderDirPath); //获取当前目录JPG文件列表 GetFiles获取指定目录中文件的名称(包括其路径) FileInfo[] fileInfo = dir.GetFiles("*.jpg"); //防止图片失真 this.imageList.ColorDepth = ColorDepth.Depth32Bit; //将文件夹图片加入图片列表 for (int i = 0; i < fileInfo.Length; i++) { //完整路径 picDirPath = fileInfo[i].FullName; //记录图片源路径 双击显示图片时使用 imagePathList.Add(picDirPath); this.imageList.Images.Add(Image.FromFile(picDirPath)); } //显示文件列表 this.listView.Items.Clear(); this.listView.LargeImageList = this.imageList; this.listView.View = View.LargeIcon; //大图标显示 //设置ImageList的图像大小 从imageList属性处更改 //开始绑定 this.listView.BeginUpdate(); //增加图片至ListView控件中 for (int i = 0; i < imageList.Images.Count; i++) { ListViewItem lvi = new ListViewItem(); lvi.ImageIndex = i; lvi.Text = "picture " + i; this.listView.Items.Add(lvi); pictureBox.SizeMode = PictureBoxSizeMode.Zoom;//图像以zoom显示 } this.listView.EndUpdate(); //显示打开图片列表所需时间 sw.Stop(); long secords = sw.ElapsedMilliseconds; //毫秒单位 LabTime.Text += '\n' + (Convert.ToDouble(secords) / 1000).ToString() + 's'; //转换为秒 } /// <summary>双击ListView 显示图片至PictureBox /// /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void listView_DoubleClick(object sender, EventArgs e) { if (this.listView.SelectedItems.Count == 0) return; //采用索引方式 imagePathList记录图片真实路径 index = this.listView.SelectedItems[0].Index; //显示图片 this.pictureBox.Image = Image.FromFile(imagePathList[index]); } /// <summary>下一张 /// /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void btnNext_Click(object sender, EventArgs e) { ////防止越界 //if (index == openFileDialog.FileNames.Length - 1) //{ // index = 0; // this.pictureBox.Image = Image.FromFile(openFileDialog.FileNames[index]); //} //else //{ // index++; // this.pictureBox.Image = Image.FromFile(openFileDialog.FileNames[index]); //} if (pictureBox.Image != null) { if (index == imagePathList.Count - 1) //最后一张图片 { index = 0; this.pictureBox.Image = Image.FromFile(imagePathList[index]); } else { index++; this.pictureBox.Image = Image.FromFile(imagePathList[index]); } } } /// <summary>上一张 /// /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void btnPrevious_Click(object sender, EventArgs e) { if (pictureBox.Image != null) { if (index > 0) { index--; this.pictureBox.Image = Image.FromFile(imagePathList[index]); } else if (index == 0) { index = imagePathList.Count; index--; this.pictureBox.Image = Image.FromFile(imagePathList[index]); } } } /// <summary> 放大 /// /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void btnGetLarger_Click(object sender, EventArgs e) { int width = pictureBox.Width; int height = pictureBox.Height; int width1 = (int)(width * 1.2); int height1 = (int)(height * 1.2); pictureBox.Top = pictureBox.Top + (height - height1) / 2; pictureBox.Left = pictureBox.Left + (width - width1) / 2; pictureBox.Height = height1; pictureBox.Width = width1; //Point newLocation = new Point(); //newLocation.X = pictureBox.Location.X - (width1 - width) / 2; //newLocation.Y = pictureBox.Location.Y - (height1 - height) / 2; //pictureBox.Location = newLocation; } /// <summary> 缩小 /// /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void btnGetSmaller_Click(object sender, EventArgs e) { int width = pictureBox.Width; int height = pictureBox.Height; int width1 = (int)(pictureBox.Width * 0.8); int height1 = (int)(pictureBox.Height * 0.8); pictureBox.Width = width1; pictureBox.Height = height1; Point newLocation = new Point(); newLocation.X = pictureBox.Location.X + (width - width1) / 2; newLocation.Y = pictureBox.Location.Y + (height - height1) / 2; pictureBox.Location = newLocation; } /// <summary> 顺时针旋转 /// /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void btnClockwise_Click(object sender, EventArgs e) { pictureBox.Image.RotateFlip(RotateFlipType.Rotate90FlipNone); pictureBox.Refresh(); } /// <summary> 逆时针旋转 /// /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void btnContrarotate_Click(object sender, EventArgs e) { pictureBox.Image.RotateFlip(RotateFlipType.Rotate270FlipNone); pictureBox.Refresh(); } /// <summary> 漫游 /// /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void btnRoam_Click(object sender, EventArgs e) { pictureBox.Cursor = Cursors.Hand; } //漫游 private void pictureBox_MouseMove(object sender, MouseEventArgs e) { //label2.Text = Cursor.Position.X.ToString(); //label4.Text = Cursor.Position.Y.ToString(); statusX.Text = Cursor.Position.X.ToString();//所有用e传位置的，都可改为用cursor statusY.Text = Cursor.Position.Y.ToString();//如果用e来传位置，反应太慢，图片会一闪一闪 //如果按下鼠标左键不放，移动鼠标，实施漫游 if (e.Button == MouseButtons.Left) { //开始移动图片 pictureBox.Top = pictureBox.Top + Cursor.Position.Y - oldCursorPosition.Y; pictureBox.Left = pictureBox.Left + Cursor.Position.X - oldCursorPosition.X; //e.X是新位置，用新位置减去老位置，等于增量 //移动结束后，鼠标的新位置变成漫游的起始位置 oldCursorPosition = Cursor.Position; } } private void pictureBox_MouseDown(object sender, MouseEventArgs e) { if (e.Button == MouseButtons.Left) oldCursorPosition = Cursor.Position;//e.location更改为cursor.position } private void btn另存为_Click(object sender, EventArgs e) { if (SaveFileDialog.ShowDialog() == DialogResult.OK) { string pictureName = SaveFileDialog.FileName; if (pictureName == "") { MessageBox.Show("命名不得为空"); } else { if (pictureBox.Image != null) { ////********************照片另存********************************* using (MemoryStream mem = new MemoryStream()) { //这句很重要，不然不能正确保存图片或出错（关键就这一句） Bitmap bmp = new Bitmap(pictureBox.Image); //保存到内存 //bmp.Save(mem, pictureBox1.Image.RawFormat ); //保存到磁盘文件 bmp.Save(@pictureName, pictureBox.Image.RawFormat); bmp.Dispose(); MessageBox.Show("照片另存成功！", "系统提示"); } ////********************照片另存********************************* } } } } private void GetPicture_KeyPress(object sender, KeyPressEventArgs e) { //快捷键 if (e.KeyChar == 'o' || e.KeyChar == 'O') { btnOpenPicture_Click(null, null);//如果按键是o或O，执行一次打开操作； } else if (e.KeyChar == '+') { btnGetLarger_Click(null, null); } else if (e.KeyChar == '-') { btnGetSmaller_Click(null, null); } else if (e.KeyChar == 'p' || e.KeyChar == 'P') { btnPrevious_Click(null, null); } else if (e.KeyChar == 'n' || e.KeyChar == 'N') { btnNext_Click(null, null); } else if (e.KeyChar == 's' || e.KeyChar == 'S') { btn另存为_Click(null, null); } } } }阅读全文
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