C# 如何将图形转换为图像或位图？
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时间：2020-08-10 00:47:49 来源:igfitidea点击:
How to convert Graphics into Image or Bitmap?
提问by James Andrew Cruz
How to convert Graphics into Image or Bitmap?
如何将图形转换为图像或位图？
I have this code and it successfully crops my image in a picturebox but when I try to save it into a database.. it's empty.
我有这个代码，它成功地在图片框中裁剪了我的图像，但是当我尝试将它保存到数据库中时..它是空的。
Bitmap sourceBitmap = new Bitmap(pctImage.Image, pctImage.Width, pctImage.Height);
Graphics g = frmAdd.pctImage.CreateGraphics();
Rectangle rectCropArea;
rectCropArea = new Rectangle(50, 3, 230, 240);
g.DrawImage(sourceBitmap, new Rectangle(0, 0, frmAdd.pctImage.Width, frmAdd.pctImage.Height), rectCropArea, GraphicsUnit.Pixel);
sourceBitmap.Dispose();
What should I do with this one? Thanks.
我该怎么办？谢谢。
回答by Ravindra Bagale
like this:
像这样：
Bitmap bmp = new Bitmap(100,100,graphics);
回答by Caster Troy
Use a structure like this:
使用这样的结构：
using (Bitmap bitmap = new Bitmap(rectangle.Width, rectangle.Height))
{
using (Graphics graphics = Graphics.FromImage(bitmap))
{
//draw image..
}
return bitmap;
}
