How to create bitmap from byte array?

You'll need to get those bytes into a MemoryStream:

Bitmap bmp;using (var ms = new MemoryStream(imageData)){    bmp = new Bitmap(ms);}

That uses the Bitmap(Stream stream) constructor overload.

UPDATE: keep in mind that according to the documentation, and the source code I've been reading through, an ArgumentException will be thrown on these conditions:

stream does not contain image data or is null.-or-stream contains a PNG image file with a single dimension greater than 65,535 pixels.

Guys thank you for your help. I think all of this answers works. However i think my byte array contains raw bytes. That's why all of those solutions didnt work for my code.

However i found a solution. Maybe this solution helps other coders who have problem like mine.

static byte[] PadLines(byte[] bytes, int rows, int columns) {   int currentStride = columns; // 3   int newStride = columns;  // 4   byte[] newBytes = new byte[newStride * rows];   for (int i = 0; i < rows; i++)       Buffer.BlockCopy(bytes, currentStride * i, newBytes, newStride * i, currentStride);   return newBytes; } int columns = imageWidth; int rows = imageHeight; int stride = columns; byte[] newbytes = PadLines(imageData, rows, columns); Bitmap im = new Bitmap(columns, rows, stride,           PixelFormat.Format8bppIndexed,           Marshal.UnsafeAddrOfPinnedArrayElement(newbytes, 0)); im.Save("C:\\Users\\musa\\Documents\\Hobby\\image21.bmp");

This solutions works for 8bit 256 bpp (Format8bppIndexed). If your image has another format you should change PixelFormat .

And there is a problem with colors right now. As soon as i solved this one i will edit my answer for other users.

*PS = I am not sure about stride value but for 8bit it should be equal to columns.

And also this function Works for me.. This function copies 8 bit greyscale image into a 32bit layout.

public void SaveBitmap(string fileName, int width, int height, byte[] imageData)        {            byte[] data = new byte[width * height * 4];            int o = 0;            for (int i = 0; i < width * height; i++)            {                byte value = imageData[i];                data[o++] = value;                data[o++] = value;                data[o++] = value;                data[o++] = 0;             }            unsafe            {                fixed (byte* ptr = data)                {                    using (Bitmap image = new Bitmap(width, height, width * 4,                                PixelFormat.Format32bppRgb, new IntPtr(ptr)))                    {                        image.Save(Path.ChangeExtension(fileName, ".jpg"));                    }                }            }        }

Can be as easy as:

var ms = new MemoryStream(imageData);System.Drawing.Image image = Image.FromStream(ms);image.Save("c:\\image.jpg");

Testing it out:

byte[] imageData;// Create the byte array.var originalImage = Image.FromFile(@"C:\original.jpg");using (var ms = new MemoryStream()){    originalImage.Save(ms, ImageFormat.Jpeg);    imageData = ms.ToArray();}// Convert back to image.using (var ms = new MemoryStream(imageData)){    Image image = Image.FromStream(ms);    image.Save(@"C:\newImage.jpg");}