You can resize the image before saving it , if
you are using the fileupload then this code will help you to resize the image with no
effect on the picture quality and you can save it in any format such as .png ,.jpeg,
.bmp and .gif etc.
using
System.Drawing;
using
System.Drawing.Drawing2D;
using
System.Drawing.Imaging;
fileupload1.SaveAs(Server.MapPath("images/tempImage/"
+ fileupload1.FileName));
System.Drawing.Image image
= System.Drawing.Image.FromFile(Server.MapPath("images/tempImage/"
+ fileupload1.FileName));
int
newwidthimg = 200;
float
AspectRatio = (float)image.Size.Width / (float)image.Size.Height;
int
newHeight = 200;
Bitmap bitMAP1 =
new Bitmap(newwidthimg, newHeight);
Graphics imgGraph =
Graphics.FromImage(bitMAP1);
bitMAP1.imgQuality
= CompositingQuality.HighQuality;
bitMAP1.SmoothingMode = SmoothingMode.HighQuality;
bitMAP1.InterpolationMode = InterpolationMode.HighQualityBicubic;
var imgDimesions =
new Rectangle(0, 0, newwidthimg, newHeight);
bitMAP1.DrawImage(image, imageRectangle);
bitMAP1.Save(Server.MapPath("images/Shops/"
+fileupload1.filename), ImageFormat.Jpeg);
bitMAP1.Dispose();
bitMAP1.Dispose();
image.Dispose();
if
(System.IO.File.Exists(Server.MapPath("images/tempImage/"
+ fileupload1.FileName)))
{
System.IO.File.Delete(Server.MapPath("images/tempImage/"
+ fileupload1.FileName));
}