Depending on how you create an instance of UTF8Encoding, you will get
different results. The encoding can contain a preamble, which identifies
the encoding used together with the encoded data. The
System.Encoding .UTF8 encoding always includes a preamble.
Using the code below you will get the output:
Stream length: 14
Stream length: 17
Stream length: 17
Which indicates that the first stream does not contain any preamble, but
the other two does.
Regards,
Joakim
using System;
using System.Text;
using System.IO;
public class App
{
public static void Main()
{
// Create an encoding without the preamble
MemoryStream ms1 = new MemoryStream();
StreamWriter w1 = new StreamWriter(ms 1, new UTF8Encoding(fa lse));
w1.Write("This is a test");
w1.Flush();
Console.WriteLi ne("Stream length: " + ms1.Length);
// Create an encoding specifically with the preamble
MemoryStream ms2 = new MemoryStream();
StreamWriter w2 = new StreamWriter(ms 2, new UTF8Encoding(tr ue));
w2.Write("This is a test");
w2.Flush();
Console.WriteLi ne("Stream length: " + ms2.Length);
// Use the default UTF8 encoding, which uses the preamble
MemoryStream ms3 = new MemoryStream();
StreamWriter w3 = new StreamWriter(ms 3, Encoding.UTF8);
w3.Write("This is a test");
w3.Flush();
Console.WriteLi ne("Stream length: " + ms3.Length);
}
}
ASP Yaboh wrote:
Not sure what you mean by who creates StreamWriter - it's provided in the C#
language. I am using the default "UTF8Encodi ng".
