How can I render an HTML image from byte data?

Question

How can I render an HTML image from byte data loaded from a database?

I am retreiving data from database as a byte array. I need to convert that into png format. Is this possible??

below shown is the byte array.

Byte[] imageArray = new byte[0];
MyData = (Byte[])dt.Tables[0].Rows[3]["img"];

How can someone upvote this question. It lacks information and is unclear what the expected end result should be. — Patrick Hofman, Mar 18 '14 at 09:51
I couldn't find the relationship between `imageArray` and `MyData` lol — SuicideSheep, Mar 18 '14 at 09:53
If I understand well maybe you can use a library like ImageMaigck. I think with this you can construct an image to whatever format given a byte array. — Spyros, Mar 18 '14 at 09:54

score 0 · Accepted Answer · edited Mar 18 '14 at 09:55

0

You can do it by using the convert function. Refer the code below....

Byte[] imageArray = new byte[0];
MyData = (Byte[])dt.Tables[0].Rows[3]["img"];
if (imageArray!= null && imageArray.Length > 0)
{
   string img = Convert.ToBase64String(imageArray, 0, imageArray.Length);
   pictureBox1.ImageUrl = "data:image/png;base64," + img;
}

edited Mar 18 '14 at 09:55

Alex R.

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answered Mar 18 '14 at 09:48

Kailas

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score 0 · Answer 2 · answered Mar 18 '14 at 09:51

0

You can try the following function

public static Image ByteArrayToImagebyMemoryStream(byte[] imageByte)
{
    MemoryStream ms = new MemoryStream(imageByte);
    Image image = Image.FromStream(ms);
    return image;
}

answered Mar 18 '14 at 09:51

SuicideSheep

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score 0 · Answer 3 · edited Jun 27 '14 at 13:30

You can try the following function:

System.Drawing.Image newImage;
string strFileName = GetTempFolderName() + "yourfilename.gif";

if (byteArrayIn != null)
{
    using (MemoryStream stream = new MemoryStream(byteArrayIn))
    {
        newImage = System.Drawing.Image.FromStream(stream);
        newImage.Save(strFileName);
        img.Attributes.Add("src", strFileName);
    }
}
else
{
    Response.Write("No image data found!");
}

score 0 · Answer 4 · answered Mar 18 '14 at 10:02

Hope this answer will Help You

public byte[] imageToByteArray(System.Drawing.Image imageIn)
{
 MemoryStream ms = new MemoryStream();
 imageIn.Save(ms,System.Drawing.Imaging.ImageFormat.Gif);
 return  ms.ToArray();
}

public Image byteArrayToImage(byte[] byteArrayIn)
{
     MemoryStream ms = new MemoryStream(byteArrayIn);
     Image returnImage = Image.FromStream(ms);

return returnImage; }

How can I render an HTML image from byte data?

4 Answers4