public static async Task <string> ReadBytesAsync(byte[] source, int selector = 0)
{
switch (selector)
{
/* BOM will be removed. */
case 0:
// MemoryStream constructor and StreamReader constructor then ReadToEndAsync
using (var ms = new MemoryStream(source))
using (var sr = new StreamReader(ms))
return(await sr.ReadToEndAsync());
case 1:
// MemoryStream constructor and StreamReader constructor with encoding then ReadToEndAsync
using (var ms = new MemoryStream(source))
using (var sr = new StreamReader(ms, Encoding.UTF8))
return(await sr.ReadToEndAsync());
case 2:
// StreamReader constructor then MemoryStream.WriteAsync then ReadToEndAsync
using (var ms = new MemoryStream())
using (var sr = new StreamReader(ms))
{
await ms.WriteAsync(source, 0, source.Length);
ms.Seek(0, SeekOrigin.Begin);
return(await sr.ReadToEndAsync());
}
case 3:
// StreamReader constructor then BinaryWriter.Write then ReadToEndAsync
using (var ms = new MemoryStream())
using (var bw = new BinaryWriter(ms))
using (var sr = new StreamReader(ms))
{
bw.Write(source);
ms.Seek(0, SeekOrigin.Begin);
return(await sr.ReadToEndAsync());
}
case 4:
// MemoryStream constructor then ReadAsync then UnicodeStringReader.Read
using (var ms = new MemoryStream(source))
{
var buff = new byte[ms.Length];
await ms.ReadAsync(buff, 0, buff.Length);
return(UnicodeStringReader.Read(buff));
}
/* BOM will remain as unreadable character. */
case 5:
// MemoryStream constructor then ReadAsync then Encoding.GetString
using (var ms = new MemoryStream(source))
{
var buff = new byte[ms.Length];
await ms.ReadAsync(buff, 0, buff.Length);
return(Encoding.UTF8.GetString(buff));
}
case 6:
// MemoryStream WriteAsync then ToArray then Encoding.GetString
using (var ms = new MemoryStream())
{
await ms.WriteAsync(source, 0, source.Length);
return(Encoding.UTF8.GetString(ms.ToArray()));
}
case 7:
// MemoryStream WriteAsync then GetBuffer then Encoding.GetString
using (var ms = new MemoryStream())
{
await ms.WriteAsync(source, 0, source.Length);
return(Encoding.UTF8.GetString(ms.GetBuffer(), 0, (int)ms.Length));
}
default:
throw new ArgumentOutOfRangeException(nameof(selector));
}
}
public static string ReadBytes(byte[] source, int selector = 0)
{
switch (selector)
{
/* BOM will be removed. */
case 0:
// MemoryStream constructor and StreamReader constructor then ReadToEnd
using (var ms = new MemoryStream(source))
using (var sr = new StreamReader(ms))
return(sr.ReadToEnd());
case 1:
// MemoryStream constructor and StreamReader constructor with encoding then ReadToEnd
using (var ms = new MemoryStream(source))
using (var sr = new StreamReader(ms, Encoding.UTF8))
return(sr.ReadToEnd());
case 2:
// StreamReader constructor then MemoryStream.Write then ReadToEnd
using (var ms = new MemoryStream())
using (var sr = new StreamReader(ms))
{
ms.Write(source, 0, source.Length);
ms.Seek(0, SeekOrigin.Begin);
return(sr.ReadToEnd());
}
case 3:
// StreamReader constructor with Encoding then MemoryStream.Write then ReadToEnd
using (var ms = new MemoryStream())
using (var sr = new StreamReader(ms, Encoding.UTF8))
{
ms.Write(source, 0, source.Length);
ms.Seek(0, SeekOrigin.Begin);
return(sr.ReadToEnd());
}
case 4:
// StreamReader constructor then BinaryWriter.Write then ReadToEnd
using (var ms = new MemoryStream())
using (var bw = new BinaryWriter(ms))
using (var sr = new StreamReader(ms))
{
bw.Write(source);
ms.Seek(0, SeekOrigin.Begin);
return(sr.ReadToEnd());
}
case 5:
// MemoryStream constructor then ToArray then UnicodeStringReader.Read
using (var ms = new MemoryStream(source))
{
return(UnicodeStringReader.Read(ms.ToArray()));
}
case 6:
// MemoryStream constructor then GetBuffer then UnicodeStringReader.Read
using (var ms = new MemoryStream(source, 0, source.Length, false, true))
{
// When a MemoryStream is instantiated with a byte array, MemoryStream.GetBuffer
// method returns the identical byte array and needs not to specify its length.
return(UnicodeStringReader.Read(ms.GetBuffer()));
}
/* BOM will remain as unreadable character. */
case 7:
// Encoding.GetString
return(Encoding.UTF8.GetString(source));
case 8:
// MemoryStream constructor then ToArray then Encoding.GetString
using (var ms = new MemoryStream(source))
{
return(Encoding.UTF8.GetString(ms.ToArray()));
}
case 9:
// MemoryStream constructor then GetBuffer then Encoding.GetString
using (var ms = new MemoryStream(source, 0, source.Length, false, true))
{
// When a MemoryStream is instantiated with a byte array, MemoryStream.GetBuffer
// method returns the identical byte array and needs not to specify its length.
return(Encoding.UTF8.GetString(ms.GetBuffer()));
}
default:
throw new ArgumentOutOfRangeException(nameof(selector));
}
}
