Reading and Writing text file in Azure Storage - azure

Question

Following is the code to first save a line of text,into a text file,present in azure storage, and then read it and print .
string firstString = "this \t is \n a \t line \n are: ";
using (var memoryStream = new MemoryStream())
{
memoryStream.Write(System.Text.Encoding.UTF8.GetBytes(firstString), 0, System.Text.Encoding.UTF8.GetBytes(firstString).Length);
blockBlob.UploadFromStream(memoryStream);
}
string text;
using (var memoryStream = new MemoryStream())
{
blockBlob.DownloadToStream(memoryStream);
text = System.Text.Encoding.UTF8.GetString(memoryStream.ToArray());
Trace.WriteLine(text);
}
Problem is that nothing gets printed in the Trace.Writeline() Statement.
First i thought,that it might be a encoding issue,so i changed the format of my text file from ASCII to UTF8, but still nothing gets printed.
WHat am i missing here,any help is appreciated.

Answer 1

Replace the following line of code:
using (var memoryStream = new MemoryStream())
{
memoryStream.Write(System.Text.Encoding.UTF8.GetBytes(firstString), 0, System.Text.Encoding.UTF8.GetBytes(firstString).Length);
blockBlob.UploadFromStream(memoryStream);
}
with
using (var memoryStream = new MemoryStream())
{
memoryStream.Write(System.Text.Encoding.UTF8.GetBytes(firstString), 0, System.Text.Encoding.UTF8.GetBytes(firstString).Length);
memoryStream.Position = 0;
blob.UploadFromStream(memoryStream);
}
What's happening is that when you write the byte array to memoryStream, you're not resetting the position of stream to 0 thus a 0 byte blob is being uploaded.

Answer 2

When you use MemoryStream you first write to memory and after the write from memory to blob, it is better to write directly to blob, example:
using (var blobStream = blockBlob.OpenWrite())
{
var data = System.Text.Encoding.UTF8.GetBytes(firstString);
blobStream.Write(data, 0, data.Length);
}