Csharp/C Sharp/File Stream/Encode
Содержание
Convert Byte array to Base64 Char Array
<source lang="csharp"> using System; using System.IO; class Test {
public static void Main() {
// The size of the char[] must
// be at least 4/3 the size of the source byte[] and must be
// divisible by 4.
byte[] data = { 0x01, 0x02, 0x5A, 0xFF, 0x0, 0xF0, 0x4D, 0x62, 0x78,
0xD2, 0xC5, 0xA1, 0x5A, 0xD6, 0x0C, 0xA9, 0xA6, 0x63, 0x3D, 0xC2,
0xD5, 0x0F, 0xCC, 0x01, 0xF2, 0x0C};
char[] base64data = new char[(int)(Math.Ceiling((double)data.Length / 3) * 4)];
Console.WriteLine("\nByte array encoding/decoding");
Convert.ToBase64CharArray(data, 0, data.Length, base64data, 0);
Console.WriteLine(new String(base64data));
}
}
</source>
Encoding.ASCII.GetString
<source lang="csharp"> using System; using System.Text; class StringEncodingApp {
static void Main(string[] args) {
byte[] ba = new byte[] { 72, 101, 108, 108, 111 };
string s = Encoding.ASCII.GetString(ba);
Console.WriteLine(s);
}
}
</source>
Encoding.BigEndianUnicode.GetString
<source lang="csharp"> using System; using System.Text; class StringEncodingApp {
static void Main(string[] args) {
byte[] bb = new byte[] { 0, 72, 0, 101, 0, 108, 0, 108, 0, 111 };
string t = Encoding.BigEndianUnicode.GetString(bb);
Console.WriteLine(t);
}
}
</source>
Encoding in action
<source lang="csharp"> using System; using System.IO; using System.Text; class Test {
public static void Main()
{
using (StreamWriter output = new StreamWriter("practice.txt"))
{
// Create and write a string containing the symbol for Pi.
string srcString = "Area = \u03A0r^2";
// Convert the UTF-16 encoded source string to UTF-8 and ASCII.
byte[] utf8String = Encoding.UTF8.GetBytes(srcString);
byte[] asciiString = Encoding.ASCII.GetBytes(srcString);
// Write the UTF-8 and ASCII encoded byte arrays.
output.WriteLine("UTF-8 Bytes: {0}", BitConverter.ToString(utf8String));
output.WriteLine("ASCII Bytes: {0}", BitConverter.ToString(asciiString));
// Convert UTF-8 and ASCII encoded bytes back to UTF-16 encoded
// string and write.
output.WriteLine("UTF-8 Text : {0}", Encoding.UTF8.GetString(utf8String));
output.WriteLine("ASCII Text : {0}", Encoding.ASCII.GetString(asciiString));
Console.WriteLine(Encoding.UTF8.GetString(utf8String));
Console.WriteLine(Encoding.ASCII.GetString(asciiString));
}
}
}
</source>
Encoding: Unicode ASCII GetBytes GetString
<source lang="csharp"> using System; using System.IO; using System.Text; class MainClass {
public static void Main()
{
using (StreamWriter output = new StreamWriter("output.txt"))
{
string srcString = "Area = \u03A0r^2";
output.WriteLine("Source Text : " + srcString);
byte[] utf16String = Encoding.Unicode.GetBytes(srcString);
output.WriteLine("UTF-16 Bytes: {0}",BitConverter.ToString(utf16String));
byte[] utf8String = Encoding.UTF8.GetBytes(srcString);
byte[] asciiString = Encoding.ASCII.GetBytes(srcString);
output.WriteLine("UTF-8 Bytes: {0}",
BitConverter.ToString(utf8String));
output.WriteLine("ASCII Bytes: {0}",
BitConverter.ToString(asciiString));
output.WriteLine("UTF-8 Text : {0}",Encoding.UTF8.GetString(utf8String));
output.WriteLine("ASCII Text : {0}",Encoding.ASCII.GetString(asciiString));
}
}
}
</source>
Encoding.URF8/Unicode/UTF32/.GetBytes
<source lang="csharp"> using System; public class MainClass {
public static void Main() {
byte[] utf8Bytes = System.Text.Encoding.UTF8.GetBytes("0123456789");
byte[] utf16Bytes = System.Text.Encoding.Unicode.GetBytes("0123456789");
byte[] utf32Bytes = System.Text.Encoding.UTF32.GetBytes("0123456789");
Console.WriteLine(utf8Bytes.Length);
Console.WriteLine(utf16Bytes.Length);
Console.WriteLine(utf32Bytes.Length);
}
}
</source>
Encoding.URF8/Unicode/UTF32/GetString
<source lang="csharp"> using System; public class MainClass {
public static void Main() {
byte[] utf8Bytes = System.Text.Encoding.UTF8.GetBytes("0123456789");
byte[] utf16Bytes = System.Text.Encoding.Unicode.GetBytes("0123456789");
byte[] utf32Bytes = System.Text.Encoding.UTF32.GetBytes("0123456789");
string original1 = System.Text.Encoding.UTF8.GetString(utf8Bytes);
string original2 = System.Text.Encoding.Unicode.GetString(utf16Bytes);
string original3 = System.Text.Encoding.UTF32.GetString(utf32Bytes);
Console.WriteLine(original1);
Console.WriteLine(original2);
Console.WriteLine(original3);
}
}
</source>
