以这个代码为例,我们如何获取get到图片的宽度和高度,new Rectangle这里第一、二个参数270、100如何设置,是留空吗?
Dim file As String = "E:\问题\123.png"
Dim img As Image = getimage(file)
‘如何获取宽度?
‘如何获取高度?
Dim bmpOut As new Bitmap(290, 185, PixelFormat.Format24bppRgb) '290为裁剪区域宽度,185为高度
Dim myGraphics As Graphics = Graphics.FromImage(bmpOut)
myGraphics.Clear(Color.White)
myGraphics.DrawImage(img, new Rectangle(0, 0, 290, 185), new Rectangle(270, 100, 290, 185), GraphicsUnit.Pixel) '270为原图需要裁剪的区域的左边距,100为上边距
myGraphics.Dispose()
bmpOut.Save("E:\问题\123_1.png")