c#中jpeg图片的放大缩小

[qqtjb]

那位知道将jpg载入pictureBox后,如何对其进行缩放?
我用的是C#给ppc手机编程!
谢谢各位!

[wang123sf]

用Graphics绘图可以缩放，不知道pictureBox怎么弄，初学，同学习

[zhaojiangang]

修改载入 IMG的尺寸就好了阿

[wt0731]

用Graphics

[nyq1011]

在窗体上放置button或者是菜单，然后在其clilk事件中使用如下代码即可！当然了还有其他的办法，比如scaletransform,自己看看帮助吧！
//mZoomFactor为一常数，初始值为1.0；
Bitmap box1 = new Bitmap(pictureBox1.Image);
Graphics gp = Graphics.FromImage(pictureBox1.Image);
gp.Clear(this.pictureBox1.BackColor);
int iw, ih;
iw = pictureBox1.Image.Size.Width;
ih = pictureBox1.Image.Size.Height;
mZoomFactor = (float)(mZoomFactor * 1.25);
pictureBox1.Width = (int)(iw * mZoomFactor);
pictureBox1.Height = (int)(ih * mZoomFactor);
Rectangle destPara = new Rectangle(0, 0, (int)(iw * mZoomFactor), (int)(ih * mZoomFactor));
Rectangle rect = new Rectangle(0, 0, iw, ih);
gp.DrawImage(box1, destPara, rect, GraphicsUnit.Pixel);