CODEWITHSUNDEEP
c#arraystype-conversion
Jaqen H'ghar
Jaqen H'ghar

Reputation: 1879

How to convert byte array to image file?

I have browsed and uploaded a png/jpg file in my MVC web app. I have stored this file as byte[] in my database. Now I want to read and convert the byte[] to original file. How can i achieve this?

Upvotes: 34

Views: 97926

Answers (4)

Pablo de Castro Barbosa
Pablo de Castro Barbosa

Reputation: 81

Or just use this:

System.IO.File.WriteAllBytes(string path, byte[] bytes)

File.WriteAllBytes(String, Byte[]) Method (System.IO) | Microsoft Docs

Upvotes: 5

SReza S
SReza S

Reputation: 192

May you have trouble with the mentioned solutions on DotNet Core 3.0 or higher
so my solution is: 

using(var ms = new MemoryStream(yourByteArray)) {
   using(var fs = new FileStream("savePath", FileMode.Create)) {
      ms.WriteTo(fs);
   }
}

Upvotes: 9

Gelatin
Gelatin

Reputation: 2413

  1. Create a MemoryStream passing the array in the constructor.
  2. Read the image from the stream using Image.FromStream.
  3. Call theImg.Save("theimage.jpg", ImageFormat.Jpeg).

Remember to reference System.Drawing.Imaging and use a using block for the stream.

Upvotes: 39

George Johnston
George Johnston

Reputation: 32278

Create a memory stream from the byte[] array in your database and then use Image.FromStream.

byte[] image = GetImageFromDatabase();
MemoryStream ms = new MemoryStream(image);
Image i = Image.FromStream(ms);

Upvotes: 28

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