C# 公共控件之pictureBox
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1、添加控件
2、分别实现是三个button功能
private void 打开_Click(object sender, EventArgs e)
string pathname = string.Empty;
OpenFileDialog file = new OpenFileDialog();
file.InitialDirectory = ".";
file.Filter = "所有文件(*.*)|*.*";
file.ShowDialog();
if (file.FileName != string.Empty)
try
pathname = file.FileName; //获得文件的绝对路径
this.pictureBox1.Load(pathname);
保存.Enabled = true;
翻转90.Enabled = true;
catch (Exception ex)
MessageBox.Show(ex.Message);
private void 保存_Click(object sender, EventArgs e)
SaveFileDialog save = new SaveFileDialog();
save.ShowDialog();
if (save.FileName != string.Empty)
pictureBox1.Image.Save(save.FileName);
private void 翻转90_Click(object sender, EventArgs e)
pictureBox1.Image.RotateFlip(RotateFlipType.Rotate90FlipNone);
pictureBox1.Refresh();//刷新图片框
//顺时针旋转90度 RotateFlipType.Rotate90FlipNone
//逆时针旋转90度 RotateFlipType.Rotate270FlipNone
//水平翻转 RotateFlipType.Rotate180FlipY
//垂直翻转 RotateFlipType.Rotate180FlipX
3、实现滑动鼠标,图片放大缩小功能
public Form1()
InitializeComponent();
pictureBox1.MouseWheel += new MouseEventHandler(pictureBox1_MouseWheel);
void pictureBox1_MouseWheel(object sender, MouseEventArgs e)
pictureBox1.Width += e.Delta;
pictureBox1.Height += e.Delta;
this.Width += e.Delta;
this.Height += e.Delta;
4、实现“十字光标”
Point lastPoint = new Point(-1, -1);
private void picturebox_MouseMove(object sender, MouseEventArgs e)
if (e.Location != lastPoint)//保持十字光标不消失
pictureBox1.Refresh();
lastPoint = e.Location;
DrawReversibleLine(lastPoint);
void DrawReversibleLine(Point p)
ControlPaint.DrawReversibleLine(
pictureBox1.PointToScreen(new Point(0, p.Y)),
pictureBox1.PointToScreen(new Point(pictureBox1.Width, p.Y)),
SystemColors.Control);
ControlPaint.DrawReversibleLine(
pictureBox1.PointToScreen(new Point(p.X, 0)),
pictureBox1.PointToScreen(new Point(p.X, pictureBox1.Height)),
SystemColors.Control);//Color.ForestGreen
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