1、PictureBox类
表示用于显示图像的 Windows 图片框控件,通常使用 PictureBox 来显示位图、元文件、图标、JPEG、GIF 或 PNG 文件中的图形。
—MSDN
2、PictureBox控件的使用
工具箱中的公共控件中托出PictureBox控件
设置SizeMode属性—枚举类型
PictureBox.Image获得图片的路径:三种方法
1.绝对路径:
this.pictureBox2.Image=Image.FromFile("D:\\001.jpg");
2.相对路径:
Application.StartupPath;
可以得到程序根目录
this.pictureBox2.Image=Image.FromFile(Application.StartupPath "\\1.gif");
3.获得网络图片的路径
this.pictureBox2.Image= Image.FromStream(System.Net.WebRequest.Create(http://www.pxkt.com/logo.gif).GetResponse().GetResponseStream());
注:1、获得指定文件夹的所有文件的全路径
string [] path=Directory.GetFiles(@"......");
2、如果不加 if (pictureBox1.Image != null)pictureBox1.Image.Dispose();会导致内存的溢出而报错。
示例:
/// <summary> /// 程序进入的时候加载函数,给每个picturebox给一张照片 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void Form1_Load(object sender, EventArgs e) { pictureBox1.SizeMode = PictureBoxSizeMode.StretchImage; pictureBox2.SizeMode = PictureBoxSizeMode.StretchImage; pictureBox3.SizeMode = PictureBoxSizeMode.StretchImage; pictureBox1.Image = Image.FromFile(path[i]); pictureBox2.Image = Image.FromFile(@"C:\Users\Administrator\Desktop\4\_DSC2211.jpg"); pictureBox3.Image = Image.FromFile(@"C:\Users\Administrator\Desktop\4\_DSC2211.jpg"); } string[] path = Directory.GetFiles(@"C:\Users\Administrator\Desktop\4"); int i = 0; Random r = new Random(); /// <summary> /// 定时器控制每隔一秒换一张图片 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void timer1_Tick(object sender, EventArgs e) { i++; if (i == path.Length) { i = 0; } if (pictureBox1.Image != null)pictureBox1.Image.Dispose(); if (pictureBox2.Image != null) pictureBox2.Image.Dispose(); if (pictureBox3.Image != null) pictureBox3.Image.Dispose(); pictureBox1.Image = Image.FromFile(path[r.Next(0,path.Length)]); pictureBox2.Image = Image.FromFile(path[r.Next(0,path.Length)]); pictureBox3.Image = Image.FromFile(path[r.Next(0,path.Length)]); }
值得注意的是如果不加
if (pictureBox1.Image != null)pictureBox1.Image.Dispose();会导致内存的溢出。
时间: 2024-10-10 14:18:24