How to convert image in binary format to image format

I have a code to store images directly to the database in binary format. But I cannot retrieve the image. This is my image uploading code.

if(FileUpload2.HasFile)

if (FileUpload2.PostedFile.ContentType == "image/jpg" || FileUpload2.PostedFile.ContentType == "image/jpeg" || FileUpload2.PostedFile.ContentType == "image/png")

int filelength = FileUpload2.PostedFile.ContentLength;

byte[] imagebytes = new byte[filelength];

SqlCommand cmd = new SqlCommand();

//cmd.CommandText = "Insert into login(image) values(@image)";

//cmd = new SqlCommand("update login set image=@image where uname=@uname", con);

cmd.CommandText = "update login set image=@image where uname=@uname";

cmd.Parameters.AddWithValue("@uname", TextBox1.Text);

cmd.Parameters.AddWithValue("@image", imagebytes);

Response.Write("Image saved to database");