WinForm开发picturebox图像重绘(picturebox显示图片)代码分享

Bitmap bitmap = new Bitmap(2048, 1024);
Graphics graphic = Graphics.FromImage(bitmap);
//此处使用GDI+在graphic对象上绘图...
graphic.Dispose();
pictureBoxMain.Image = bitmap;
pictureBoxMain.SizeMode = PictureBoxSizeMode.Zoom;

Image objImage = Image.FromFile(@"../../Resouce/Image/backImage.jpg");
Graphics graphic = Graphics.FromImage(objImage);
//此处使用GDI+在graphic对象上绘图...
graphic.Dispose();
pictureBoxMain.Image = bitmap;
pictureBoxMain.SizeMode = PictureBoxSizeMode.Zoom;