Code conversion from MVC to C# asp.net webforms

Code conversion from MVC to C# asp.net webforms

I found a nice code to resize image on server, But code is for MCV.
I have no experience in C# would like to know what change i need to make
to this code so that it i can call from image object of webform it self.
<img src="@Url.Action("ResizeImage", "Controller", new { urlImage =
"<url_image>", width = 35 })" />
public ActionResult ResizeImage(string imageUrl, int width)
{
WebImage wImage = new WebImage(imageUrl);
wImage = WebImageExtension.Resize(wImage, width);
return File(wImage.GetBytes(), "image/png");
}
public static class WebImageExtension
{
private static readonly IDictionary<string, ImageFormat>
TransparencyFormats =
new Dictionary<string,
ImageFormat>(StringComparer.OrdinalIgnoreCase) { { "png",
ImageFormat.Png }, { "gif", ImageFormat.Gif } };
public static WebImage Resize(this WebImage image, int width)
{
double aspectRatio = (double)image.Width / image.Height;
var height = Convert.ToInt32(width / aspectRatio);
ImageFormat format;
if (!TransparencyFormats.TryGetValue(image.ImageFormat.ToLower(),
out format))
{
return image.Resize(width, height);
}
using (Image resizedImage = new Bitmap(width, height))
{
using (var source = new Bitmap(new
MemoryStream(image.GetBytes())))
{
using (Graphics g = Graphics.FromImage(resizedImage))
{
g.SmoothingMode =
System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
g.InterpolationMode =
System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
g.DrawImage(source, 0, 0, width, height);
}
}
using (var ms = new MemoryStream())
{
resizedImage.Save(ms, format);
return new WebImage(ms.ToArray());
}
}
}
}