How to get a stream from a byte array in a windows8 store app

Question

I have been trying get a stream from a byte array in metro style app using the following code.

InMemoryRandomAccessStream memoryStream = new InMemoryRandomAccessStream();
memoryStream.AsStreamForWrite().Write(byteArray, 0, byteArray.Length);
memoryStream.Seek(0);

It executes with no errors but stream size is zero (0). Can anybody tell me why is its size is zero?

Answer 1

You can use the DataWriter and DataReader classes. For example ...

// put bytes into the stream
var ms = new InMemoryRandomAccessStream();
var dw = new Windows.Storage.Streams.DataWriter(ms);
dw.WriteBytes(new byte[] { 0x00, 0x01, 0x02 });
await dw.StoreAsync();

// read them out
ms.Seek(0);
byte[] ob = new byte[ms.Size];
var dr = new Windows.Storage.Streams.DataReader(ms);
await dr.LoadAsync((uint)ms.Size);
dr.ReadBytes(ob);