How can I write MemoryStream to byte[]

Question

Possible Duplicate:
Creating a byte array from a stream

I'm trying to create text file in memory and write it byte[]. How can I do this?

public byte[] GetBytes()
{
    MemoryStream fs = new MemoryStream();
    TextWriter tx = new StreamWriter(fs);

    tx.WriteLine("1111");
    tx.WriteLine("2222");
    tx.WriteLine("3333");

    tx.Flush();
    fs.Flush();

    byte[] bytes = new byte[fs.Length];
    fs.Read(bytes,0,fs.Length);

    return bytes;
}

But it does not work because of data length

An object of type MemoryStream has the Property "ToArray()". There you get the byte[] — Tomtom, Jan 21 '13 at 16:37
Will this help you http://stackoverflow.com/questions/221925/creating-a-byte-array-from-a-stream ? — Kaf, Jan 21 '13 at 16:37
@yan.kun The closed original had only the first line when closed. He's added more info since, as well as - for some reason - posting this duplicate. — J. Steen, Jan 21 '13 at 16:42

score 169 · Accepted Answer · answered Jan 21 '13 at 16:37

169

How about:

byte[] bytes = fs.ToArray();

answered Jan 21 '13 at 16:37

Gabe

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score 5 · Answer 2 · answered Jan 21 '13 at 16:39

5

Try the following code:

public byte[] GetBytes()
{
MemoryStream fs = new MemoryStream();
TextWriter tx = new StreamWriter(fs);

tx.WriteLine("1111");
tx.WriteLine("2222");
tx.WriteLine("3333");

tx.Flush();
fs.Flush();
byte[] bytes = fs.ToArray();
return bytes;
}

answered Jan 21 '13 at 16:39

Tomtom

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3

+1. note that using `using` instead of `Flush` is much safer. Also requires somewhat unusual code for MemoryStream to be accessible after Dispose - need to create MemoryStream before `using (ms)`... – Alexei Levenkov Jan 21 '13 at 16:50

score 3 · Answer 3 · answered Jan 21 '13 at 16:38

3

byte[] ObjectToByteArray(Object obj)
{
    using (MemoryStream ms = new MemoryStream())
    {
        BinaryFormatter b = new BinaryFormatter();
        b.Serialize(ms, obj);
        return ms.ToArray();
    }
}

answered Jan 21 '13 at 16:38

Priyank Thakkar

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score 1 · Answer 4 · answered Jan 21 '13 at 16:46

    public byte[] GetBytes()
    {
        MemoryStream fs = new MemoryStream();
        TextWriter tx = new StreamWriter(fs);

        tx.WriteLine("1111");
        tx.WriteLine("2222");
        tx.WriteLine("3333");

        tx.Flush();
        fs.Flush();

        fs.Position = 0;

        byte[] bytes = new byte[fs.Length];
        fs.Read(bytes, 0, bytes.Length);

        return bytes;
    }

How can I write MemoryStream to byte[]

4 Answers4

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