.NET-Core byte array to Image

Question

how do I convert a byte[] to an Image in .NET Core?

I found this:

using (var ms = new MemoryStream(byteArrayIn))
{
    return Image.FromStream(ms);
}

but it seems like Image doesnt exist in .NET-Core.

No indeed it is not released yet. you can use the library ImageSharp — Lenny32
– Lenny32, Commented Jun 13, 2017 at 10:59
oh thats weird. If you would answer this question I could mark it as correct — Moritz Schmidt
– Moritz Schmidt, Commented Jun 13, 2017 at 10:59
@ZbigniewWiadro nice to hear that :-) You should probably answer this question — Moritz Schmidt
– Moritz Schmidt, Commented May 15, 2020 at 12:39

Stacked · Accepted Answer · 2017-11-26 00:31:04Z

6

No indeed it is not released yet. you can use the library ImageSharp.

edited Nov 26, 2017 at 0:31

Stacked

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answered Jun 13, 2017 at 10:59

Lenny32

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Comments

Ahmed Mansour · Accepted Answer · 2018-11-09 16:22:37Z

3

To return an image from a byte array, you can either:

return base64

Byte[] profilePicture = await _db.Players
                                 .Where(p => p.Id == playerId)
                                 .Select(p => p.ProfilePicture)
                                 .FirstOrDefaultAsync();

return Ok(Convert.ToBase64String(profilePicture));

And then you can use any online tool that converts base64 to image to test it.

or return FileContentResult File(byte[] fileContents, string contentType)
```
return File(profilePicture, "image/png");
```
You should be able to test this from Postman or anything similar as the picture will show up in the body of the response there.

edited Nov 9, 2018 at 16:22

answered Nov 9, 2018 at 16:13

Ahmed Mansour

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Comments

Matias Masso · Accepted Answer · 2023-04-10 09:28:09Z

1

You'll need to install the System.Drawing.Common NuGet package. Then you may use next function:

    public static System.Drawing.Image ImageFromByteArray(byte[] src)
    {
        MemoryStream ms = new MemoryStream(src);
        System.Drawing.Image retval = System.Drawing.Image.FromStream(ms);
        return retval;
    }

answered Apr 10, 2023 at 9:28

Matias Masso

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Comments

Carlos de Jesus Baez · Accepted Answer · 2019-12-09 15:49:38Z

-2

If you are using javascript

img tag:

html

<img id="logoPic" src="" />

js:

document.getElementById("logoPic").src = "data:image/png;base64," + yourByte;

with insertCell:

row.insertCell(2).innerHTML = "<img src='" + "data:image/png;base64," + yourByte + "'></>";

with td:

"<td>"+ "<img src='" + "data:image/png;base64," + yourByte + "'></>" + "</td>"

If you are using jquery:

html

<img id="logoPic" src="" />

JQuery:

$('#logoPic').attr('src', `data:image/png;base64,${YourByte}`);

answered Dec 9, 2019 at 15:49

Carlos de Jesus Baez

3953 silver badges7 bronze badges

2 Comments

R.Akhlaghi Over a year ago

this question about dotnet core dear @carlos

Carlos de Jesus Baez Over a year ago

you can use JavaScript in donet core dear @R.Akjlaghi, donet core is the environment.

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