Hello guys, I try to save data with pictures and without pictures but I do not know where the mistake He gives me this
here is code for controller
public ActionResult Scan()
{
string ScanData;
// blob(image) coming in
using (Stream receiveStream = Request.InputStream)
{
using (StreamReader readStream = new StreamReader(receiveStream, Encoding.UTF8))
{
// Reading blob(image)
ScanData = readStream.ReadToEnd();
}
}
// Removing extras from blob(image)
byte[] Data = Convert.FromBase64String(ScanData.Replace("data:;base64,", string.Empty).Replace("data:application/octet-stream;base64,", string.Empty));
//blob(image) Temporary held until the rest of data comes in to "Create" method.
TempData["ScannedImage"] = Data;
//System.IO.File.WriteAllBytes("FileName.png", Data); // save scanned images to files.
return null; // return nothing, the rest of the data will be processed in the "Create" method.
}
and this a create action
public async Task<ActionResult> Create(Inbox model/*,IEnumerable<HttpPostedFileBase>File*/)
{
var currentUser = await manager.FindByIdAsync(User.Identity.GetUserId());
if (ModelState.IsValid)
{
model.User = currentUser;
var max = new Inbox();
max.File = TempData["ScannedImage"] as byte[];//from "Scan" method, converted back to byte[]
max.NameWared = model.NameWared;
db.Inboxs.Add(model);
db.SaveChanges();
string url = Url.Action("List");
return Json(new { success = true, url = url });
}
return View(model);
}
and this is my model
namespace Arcive_project.Models
{
public class Inbox
{
[Key]
public int InboxId { get; set; }
public string WaridNO { get; set; }
public string NameWared { get; set; }
public byte[] File { get; set; }
[NotMapped] // Won't be mapped to db, only used to show images on page.
public string image { get; set; }
}
}
Member
9 Points
33 Posts
upload image and save values
Mar 01, 2019 09:53 AM|mas mas|LINK
Hello guys, I try to save data with pictures and without pictures but I do not know where the mistake He gives me this
here is code for controller
public ActionResult Scan() { string ScanData; // blob(image) coming in using (Stream receiveStream = Request.InputStream) { using (StreamReader readStream = new StreamReader(receiveStream, Encoding.UTF8)) { // Reading blob(image) ScanData = readStream.ReadToEnd(); } } // Removing extras from blob(image) byte[] Data = Convert.FromBase64String(ScanData.Replace("data:;base64,", string.Empty).Replace("data:application/octet-stream;base64,", string.Empty)); //blob(image) Temporary held until the rest of data comes in to "Create" method. TempData["ScannedImage"] = Data; //System.IO.File.WriteAllBytes("FileName.png", Data); // save scanned images to files. return null; // return nothing, the rest of the data will be processed in the "Create" method. }and this a create action
public async Task<ActionResult> Create(Inbox model/*,IEnumerable<HttpPostedFileBase>File*/) { var currentUser = await manager.FindByIdAsync(User.Identity.GetUserId()); if (ModelState.IsValid) { model.User = currentUser; var max = new Inbox(); max.File = TempData["ScannedImage"] as byte[];//from "Scan" method, converted back to byte[] max.NameWared = model.NameWared; db.Inboxs.Add(model); db.SaveChanges(); string url = Url.Action("List"); return Json(new { success = true, url = url }); } return View(model); }and this is my model
namespace Arcive_project.Models { public class Inbox { [Key] public int InboxId { get; set; } public string WaridNO { get; set; } public string NameWared { get; set; }public byte[] File { get; set; }
[NotMapped] // Won't be mapped to db, only used to show images on page. public string image { get; set; } } }
I need some help guys
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Re: upload image and save values
Mar 01, 2019 03:35 PM|mgebhard|LINK
The string is not a valid Base64 string. Refactor your code a bit so you can see the results of the Replace() methods.
string temp = ScanData.Replace("data:;base64,", string.Empty); temp = temp.Replace("data:application/octet-stream;base64,", string.Empty); byte[] Data = Convert.FromBase64String(temp);Member
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458 Posts
Re: upload image and save values
Mar 01, 2019 03:46 PM|yogyogi|LINK
Saving images in database is a wrong approach.
You basically store images on some directory of the server and store only the image path on the database.
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9 Points
33 Posts
Re: upload image and save values
Mar 02, 2019 09:25 AM|mas mas|LINK
yes mr.yoyogi
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587 Points
406 Posts
Re: upload image and save values
Mar 02, 2019 02:24 PM|jzero|LINK
If you have to replace data like above looks like image is coming from an http stream where image is inline.
If yes the "data:;base64," should include media type like "data:image/gif;base64," or "data:image/jpeg;base64,"
https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/Data_URIs
As already pointed split your string and check values in debug mode