c# - CloudBlob.DownloadToStream returns null -

i'm trying download file cloudblob via stream. refer article cloudblob

here code download blob

public stream downloadblobasstream(cloudstorageaccount account, string bloburi) {     stream mem = new memorystream();     cloudblobclient blobclient = account.createcloudblobclient();     cloudblockblob blob = blobclient.getblockblobreference(bloburi);      if (blob != null)         blob.downloadtostream(mem);      return mem; }   

and code convert byte array

    public static byte[] readfully(stream input)     {         byte[] buffer = new byte[16 * 1024];         using (memorystream ms = new memorystream())         {             int read;             while ((read = input.read(buffer, 0, buffer.length)) > 0)             {                 ms.write(buffer, 0, read);             }             return ms.toarray();         }     }   

but null value. below content of streamed file.

what wrong this? please help.

edit

setting position 0 inside readfully method not allowed, put inside downloadblobasstream

this should work now:

public stream downloadblobasstream(cloudstorageaccount account, string bloburi) {     stream mem = new memorystream();     cloudblobclient blobclient = account.createcloudblobclient();     cloudblockblob blob = blobclient.getblockblobreference(bloburi);      if (blob != null)         blob.downloadtostream(mem);     mem.position = 0;        return mem; }  

your problem input stream pointer set end of steam (see screen shot, length , position both shows same value) that's why when read null. need set input stream pointer 0 using stream.position = 0 below:

public static byte[] readfully(stream input) {     byte[] buffer = new byte[16 * 1024];      input.position = 0; // add line set input stream position 0      using (memorystream ms = new memorystream())     {         int read;         while ((read = input.read(buffer, 0, buffer.length)) > 0)         {             ms.write(buffer, 0, read);         }         return ms.toarray();     } }