Resize image on server without download - asp.net

Question

I have images present on server in asp.net. I want to create their thumbnails by just copying, resizing, renaming and at last saving them on server itself. For compression I have the code but how can I Save the file.
if (fileUploader.HasFile)
{
string fileName = Path.GetFileName(fileUploader.PostedFile.FileName);
string ext = string.Empty;
ext = System.IO.Path.GetExtension(fileUploader.FileName.ToString()).ToLower();
fileUploader.PostedFile.SaveAs(Server.MapPath("~/Images_Coach/" + hdnCoachId.Value + "/") + hdnCoachId.Value + ext);
int width = Convert.ToInt32(150);
int height = Convert.ToInt32(150);
Stream inp_Stream = fileUploader.PostedFile.InputStream;
using (var image = System.Drawing.Image.FromStream(inp_Stream))
{
Bitmap myImg = new Bitmap(width, height);
Graphics myImgGraph = Graphics.FromImage(myImg);
myImgGraph.CompositingQuality = CompositingQuality.HighQuality;
myImgGraph.SmoothingMode = SmoothingMode.HighQuality;
myImgGraph.InterpolationMode = InterpolationMode.HighQualityBicubic;
var imgRectangle = new Rectangle(0, 0, width, height);
myImgGraph.DrawImage(image, imgRectangle);
newFile = hdnCoachId.Value + "_icon" + ext;
// Save the file
var path = Path.Combine(Server.MapPath("~/Images_Coach/" + hdnCoachId.Value + "/"), newFile);
myImg.Save(path, image.RawFormat);
}
}

Answer 1

I can get the file into byte array and then convert it into stream
foreach (var fileName in Directory.GetFiles(dirFile))
{
if (fileName.Contains(dir))
{
string newFile = string.Empty;
//Read the File into a Byte Array.
string ext = string.Empty;
ext = System.IO.Path.GetExtension(fileName.ToString()).ToLower();
byte[] bytes = File.ReadAllBytes(fileName);
Stream inp_Stream = new MemoryStream(bytes);
int width = Convert.ToInt32(150);
int height = Convert.ToInt32(150);
using (var image = System.Drawing.Image.FromStream(inp_Stream))
{
Bitmap myImg = new Bitmap(width, height);
Graphics myImgGraph = Graphics.FromImage(myImg);
myImgGraph.CompositingQuality = CompositingQuality.HighQuality;
myImgGraph.SmoothingMode = SmoothingMode.HighQuality;
myImgGraph.InterpolationMode = InterpolationMode.HighQualityBicubic;
var imgRectangle = new Rectangle(0, 0, width, height);
myImgGraph.DrawImage(image, imgRectangle);
newFile = dir + "_icon" + ext;
// Save the file
var newPath = Path.Combine(Server.MapPath("~/Images_Coach/" + dir + "/"), newFile);
myImg.Save(newPath, image.RawFormat);
}
}
//File.Delete
// fileName is the file name
}