How to Convert Byte[] to Image in asp.net?

Question

public System.Drawing.Image byteArrayToImage(byte[] byteArrayIn)
{
    System.Drawing.Image returnImage = null;

    try
    {
        MemoryStream ms = new MemoryStream(byteArrayIn);
        returnImage = System.Drawing.Image.FromStream(ms); // parameter is invalid

    }
    catch (Exception ex)
    {
        string a = ex.ToString();
        // Response.Write("sfdsfn");
    }

    return returnImage;
}

I did lot of search in Net but i cant get any useful answer for me? any help..thanks in advance

Given that your question is about ASP.NET, how do you intend to use your Image? You cannot simply put it in an <asp:Image> element, if that's what you were thinking, and the alternative use I can come up with does not require a conversion to System.Drawing.Image. What is your end goal? — user743382
– user743382, Commented Nov 10, 2012 at 8:40
What do you mean by parameter is invalid? Can you post the exception you are getting? — Paolo Moretti
– Paolo Moretti, Commented Nov 10, 2012 at 10:48

Ria · Accepted Answer · 2012-11-10 10:39:20Z

3

Simple way Image.FromStream:

public Image byteArrayToImage(byte[] imgBytes)
{
    using (MemoryStream imgStream = new MemoryStream(imgBytes))
    {
        return Image.FromStream(imgStream);
    }
}

answered Nov 10, 2012 at 10:39

Ria

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Comments

Kobi · Accepted Answer · 2012-11-10 08:44:41Z

0

You can use new Bitmap(ms):

Image returnImage = null;
MemoryStream ms = new MemoryStream(byteArrayIn);
returnImage = new Bitmap(ms);

Similarly, you can use Bitmap.FromStream (oddly, I can't find documentation for it).

edited Nov 10, 2012 at 8:44

answered Nov 10, 2012 at 8:38

Kobi

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3 Comments

user743382 Over a year ago

It's Image.FromStream, but Bitmap.FromStream will work as Bitmap derives from Image.

Kobi Over a year ago

@hvd - good point. Still, I expect to find it on Bitmap Methods - there are other inherited members. Oh well. Anyway, that also suggests the OP's code should work.

user743382 Over a year ago

Inherited instance members are listed, but I think it depends on the language whether static members of base classes are accessible in the derived class, and the documentation is for .NET, not C# specifically. I do agree that the current situation, where Bitmap.FromStream compiles but is hard to look up, leaves room for improvement. :)

Mohnkuchenzentrale · Accepted Answer · 2012-11-10 08:37:57Z

-1

Took me 2 minutes to find this one :

ImageConverter ic = new ImageConverter();
Image img = (Image)ic.ConvertFrom(byteArray);

answered Nov 10, 2012 at 8:37

Mohnkuchenzentrale

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