MaxMinImage放大和缩小图像实例

放大和缩小图像实例本实例在开发中有用的可以参考，MaxMinImage。
public partial class Frm_Main : Form
{
public Frm_Main()
{
InitializeComponent();
}
Image myImage;
private void button1_Click(object sender, EventArgs e)
{
//设置文件的类型
openFileDialog1.Filter = "*.jpg,*.jpeg,*.bmp,*.gif,*.ico,*.png,*.tif,*.wmf|*.jpg;*.jpeg;*.bmp;*.gif;*.ico;*.png;*.tif;*.wmf";
openFileDialog1.ShowDialog(); //打开文件对话框
myImage = System.Drawing.Image.FromFile(openFileDialog1.FileName); //实例化myImage类
pictureBox1.Image = myImage; //显示图片
pictureBox1.Height = myImage.Height; //设置pictureBox1的高度
pictureBox1.Width = myImage.Width; //设置pictureBox1的宽度
}

private void button2_Click(object sender, EventArgs e)
{
try
{
pictureBox1.Height = Convert.ToInt32(myImage.Height * Convert.ToSingle(textBox1.Text.Trim()));//设置高度
pictureBox1.Width = Convert.ToInt32(myImage.Width * Convert.ToSingle(textBox1.Text.Trim()));//设置宽度
}
catch { }
}
}