Как да конвертирате изображението в base64 в asp-мрежа

как да конвертирате изображението в base64 в asp-мрежа

public Image Base64ToImage(string base64String)
{
  // Convert Base64 String to byte[]
  byte[] imageBytes = Convert.FromBase64String(base64String);
  MemoryStream ms = new MemoryStream(imageBytes, 0, 
    imageBytes.Length);

  // Convert byte[] to Image
  ms.Write(imageBytes, 0, imageBytes.Length);
  Image image = Image.FromStream(ms, true);
  return image;
}


 //Upload images to service and save in local folder
 public ActionResult ImageUpload(string image)
 {
 if (image != null)
 {
 try
 {
 var id = "";
 string converted = image.Substring(image.IndexOf(",") + 1);

 Image TrueImage = Base64ToImage(converted);
 string directory = Server.MapPath("~/UploadedImages");
 if (!Directory.Exists(directory))
 {
 Directory.CreateDirectory(directory);
 }
 string filename = Guid.NewGuid().ToString();
 string assignGuid = filename + ".Jpeg";
 string path = System.IO.Path.Combine(directory, assignGuid);
 TrueImage.Save(path, System.Drawing.Imaging.ImageFormat.Jpeg);

 var ResizeToBytesimg = ResizeToBytes(path);

 var base64img = Convert_ImageTo_Base64(path);
 imgpost obj = new imgpost();
 if (Session["newobid"] == null)
 {
 id = Session["ID"].ToString();
 }
 else
 {
 id = Session["newobid"].ToString();
 }
 id = id.Replace("\"", "").Replace("\"", "");
 obj.obsID = id;
 obj.b64Photo = base64img;
 var json = new JavaScriptSerializer().Serialize(obj);

 string WebServiceURL = "http://serviceinstallapp/Service1.svc/sendphotobytes";

 return Json(PostDataToService(json, WebServiceURL));
 }
 catch (Exception ex)
 {
 return RedirectToAction("ValveInfo", "Home");
 }
 }
 else
 return RedirectToAction("ValveInfo", "Home");
 }

 public byte[] ResizeToBytes(string filename)
 {

 Bitmap img = new Bitmap(filename);
 double oldwidth = img.Width;
 double oldheight = img.Height;
 double newheight;
 double newwidth;
 if (oldwidth > oldheight)
 {
 newwidth = 765;
 newheight = 765 * (oldheight / oldwidth);
 }
 else
 {
 newheight = 765;
 newwidth = 765 * (oldwidth / oldheight);
 }
 Bitmap imgout = new Bitmap(img, (int)newwidth, (int)newheight);
 img.Dispose();
 imgout.Save(filename, System.Drawing.Imaging.ImageFormat.Jpeg);
 imgout.Dispose();

 FileStream f = new FileStream(filename, FileMode.Open, FileAccess.Read, FileShare.Read);
 int size = (int)f.Length;
 byte[] MyData = new byte[f.Length + 1];
 f.Read(MyData, 0, size);
 f.Close();
 return MyData;
 }

 //To convert Image To Base64 Format
 public string Convert_ImageTo_Base64(string path)
 {
 string filename = path;
 FileStream f = new FileStream(filename, FileMode.Open, FileAccess.Read, FileShare.Read);
 int size = (int)f.Length;
 byte[] MyData = new byte[f.Length + 1];
 f.Read(MyData, 0, size);
 f.Close();
 return Convert.ToBase64String(MyData);
 }
 
 //To convert Jsondatetime/Date(1389435240000+0000)/ to date
 public static DateTime ConvertToDate(string date)
 {
 DateTime val = new DateTime();
 try
 {
 if (!string.IsNullOrEmpty(date))
 {
 date = date.Replace("/Date(", string.Empty).Replace(")/", string.Empty);
 int pIndex = date.IndexOf("-");
 if (pIndex < 0) pIndex = date.IndexOf("-");
 long millisec = 0;
 date = date.Remove(pIndex);
 long.TryParse(date, out millisec);
 System.Globalization.CultureInfo ci = new System.Globalization.CultureInfo("en-GB");
 DateTime newDate = DateTime.Parse("1970,1,1);
 val = newDate.AddMilliseconds(millisec);
 }
 }
 catch
 {
 val = new DateTime();
 }
 return val;
 }