Byte Array to Bitmap Image

I made this code to receive an image and convert it to bitmap image but it doesn't work.

Here is the code:

public void ReceiveImage()
{
    NetworkStream stream = new NetworkStream(socket);
    byte[] data = new byte[4];
    stream.read(data,0,data.length,0)
    int size = BitConverter.ToInt32(data,0);
    data = new byte[size];
    stream.read(data,0,data.length)
    MemoryStream imagestream = new MemoryStream(data);
    Bitmap bmp = new Bitmap(imagestream);
    picturebox1.Image = bmp;
}

It gets to:

Bitmap bmp = new Bitmap(imagestream);

And gives me this error:

Parameter is not valid

---

这是一种替代方法

int w= 100;
int h = 200;
int ch = 3; //number of channels (ie. assuming 24 bit RGB in this case)

byte[] imageData    = new byte[w*h*ch]; //you image data here
Bitmap bitmap       = new Bitmap(w,h,PixelFormat.Format24bppRgb);
BitmapData bmData   = bitmap.LockBits(new System.Drawing.Rectangle(0, 0, bitmap.Width, bitmap.Height), ImageLockMode.ReadWrite, bitmap.PixelFormat);
IntPtr pNative      = bmData.Scan0;
Marshal.Copy(imageData,0,pNative,w*h*ch);
bitmap.UnlockBits(bmData);

---

You are probably not receiving enough bytes in stream.read(data,0,data.length) since Read does not ensure that it will read data.length bytes. you have to check its return value and continue to read till data.Length bytes are read.

See : Stream.Read Method's return value

int read = 0;
while (read != data.Length)
{
    read += stream.Read(data, read, data.Length - read);
}

PS: I am assuming length s and read s are typos.

---

我假设你有一个表，并希望从数据库接收图片。

int cout = ds.Tables["TableName"].Rows.Count;
                if (cout > 0)
                {
                    if (ds.Tables["TableName"].Rows[cout - 1]["Image"] != DBNull.Value)
                    {
                        var data = (byte[])(ds.Tables["TableName"].Rows[cout - 1]["Image"]);
                        var stream = new MemoryStream(data);
                        pictureBox1.Image = Image.FromStream(stream);
                    }
                    else
                    {
                        pictureBox1.Image = null;
                    }
                }

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