How to convert image to byte array

Question

Can anybody suggest how I can convert an image to a byte array and vice versa    I m developing a WPF application and using a stream reader

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try this   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

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For Converting an Image object to byte   you can do as follows    public static byte   converterDemo Image x        ImageConverter  imageConverter   new ImageConverter        byte   xByte    byte    imageConverter ConvertTo x  typeof byte          return xByte

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Another way to get Byte array from image path is  byte   imgdata   System IO File ReadAllBytes HttpContext Current Server MapPath path

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This is Code for converting the image of any type for example PNG  JPG  JPEG  to byte array     public static byte   imageConversion string imageName                           Initialize a file stream to read the image file         FileStream fs   new FileStream imageName  FileMode Open  FileAccess Read              Initialize a byte array with size of stream         byte   imgByteArr   new byte fs Length              Read data from the file stream and put into the byte array         fs Read imgByteArr  0  Convert ToInt32 fs Length               Close a file stream         fs Close             return imageByteArr

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Code   using System IO   byte   img   File ReadAllBytes openFileDialog1 FileName

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Here s what I m currently using  Some of the other techniques I ve tried have been non-optimal because they changed the bit depth of the pixels  24-bit vs  32-bit  or ignored the image s resolution  dpi         ImageConverter object used to convert byte arrays containing JPEG or PNG file images into        Bitmap objects  This is static and only gets instantiated once    private static readonly ImageConverter  imageConverter   new ImageConverter      Image to byte array          lt summary gt        Method to  convert  an Image object into a byte array  formatted in PNG file format  which        provides lossless compression  This can be used together with the GetImageFromByteArray          method to provide a kind of serialization   deserialization          lt  summary gt         lt param name  theImage  gt Image object  must be convertable to PNG format lt  param gt         lt returns gt byte array image of a PNG file containing the image lt  returns gt    public static byte   CopyImageToByteArray Image theImage           using  MemoryStream memoryStream   new MemoryStream                   theImage Save memoryStream  ImageFormat Png           return memoryStream ToArray                 Byte array to Image          lt summary gt        Method that uses the ImageConverter object in  Net Framework to convert a byte array         presumably containing a JPEG or PNG file image  into a Bitmap object  which can also be        used as an Image object         lt  summary gt         lt param name  byteArray  gt byte array containing JPEG or PNG file image or similar lt  param gt         lt returns gt Bitmap object if it works  else exception is thrown lt  returns gt    public static Bitmap GetImageFromByteArray byte   byteArray           Bitmap bm    Bitmap  imageConverter ConvertFrom byteArray         if  bm    null  amp  amp   bm HorizontalResolution     int bm HorizontalResolution                            bm VerticalResolution     int bm VerticalResolution                     Correct a strange glitch that has been observed in the test program when converting              from a PNG file image created by CopyImageToByteArray   - the dpi value  drifts               slightly away from the nominal integer value         bm SetResolution  int  bm HorizontalResolution   0 5f                              int  bm VerticalResolution   0 5f                 return bm        Edit  To get the Image from a jpg or png file you should read the file into a byte array using File ReadAllBytes      Bitmap newBitmap   GetImageFromByteArray File ReadAllBytes fileName      This avoids problems related to Bitmap wanting its source stream to be kept open  and some suggested workarounds to that problem that result in the source file being kept locked

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This code retrieves first 100 rows from table in SQLSERVER 2012 and saves a picture per row as a file on local disk   public void SavePicture                 SqlConnection con   new SqlConnection  Data Source localhost Integrated security true database databasename            SqlDataAdapter da   new SqlDataAdapter  select top 100  Name    Picture  From tablename   con           SqlCommandBuilder MyCB   new SqlCommandBuilder da           DataSet ds   new DataSet  tablename            byte   MyData   new byte 0           da Fill ds   tablename            DataTable table   ds Tables  tablename               for  int i   0  i  lt  table Rows Count i                                                     DataRow myRow                  myRow   ds Tables  tablename   Rows i                   MyData    byte   myRow  Picture                    int ArraySize   new int                    ArraySize   MyData GetUpperBound 0                   FileStream fs   new FileStream   C  NewFolder     myRow  Name   ToString       jpg   FileMode OpenOrCreate  FileAccess Write                   fs Write MyData  0  ArraySize                   fs Close                                 please note  Directory with NewFolder name should exist in C

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If you don t reference the imageBytes to carry bytes in the stream  the method won t return anything  Make sure you reference imageBytes   m ToArray        public static byte   SerializeImage             MemoryStream m          string PicPath   pathToImage quot            byte   imageBytes          using  Image image   Image FromFile PicPath                              using   m   new MemoryStream                       image Save m  image RawFormat                   imageBytes   new byte m Length                    Very Important                    imageBytes   m ToArray                                    end using            end using          return imageBytes         SerializeImage

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You can use File ReadAllBytes   method to read any file into byte array  To write byte array into file  just use File WriteAllBytes   method    Hope this helps    You can find more information and sample code here

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Sample code to change an image into a byte array  public byte   ImageToByteArray System Drawing Image imageIn       using  var ms   new MemoryStream               imageIn Save ms imageIn RawFormat         return  ms ToArray             C  Image to Byte Array and Byte Array to Image Converter Class

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Do you only want the pixels or the whole image  including headers  as an byte array   For pixels  Use the CopyPixels method on Bitmap  Something like   var bitmap   new BitmapImage uri      Pixel array byte   pixels   new byte width   height   4     account for stride if necessary and whether the image is 32 bit  16 bit etc   bitmap CopyPixels   size  pixels  fullStride  0

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To be convert the image to byte array The code is give below   public byte   ImageToByteArray System Drawing Image images       using  var  memorystream   new MemoryStream               images Save  memorystream  images RawFormat         return   memorystream  ToArray             To be convert the Byte array to Image The code is given below The code is handle A Generic error occurred in GDI  in Image Save   public void SaveImage string base64String  string filepath           image convert to base64string is base64String        File path is which path to save the image      var bytess   Convert FromBase64String base64String       using  var imageFile   new FileStream filepath  FileMode Create                 imageFile Write bytess  0  bytess Length           imageFile Flush

[c#] How to convert image to byte array

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