C # byte array converted to string

C # byte array converted to string

If you want to find a way to convert between strings and byte arrays from the System.String class, I'm afraid you'll be disappointed. To make such a transition, we had to use another class: System.Text.Encoding. The class provides the bye[] GetBytes (String) method to convert a string to a byte array, and a string GetString (byte[]) method to convert a C # byte array to a string.

The System.Text.Encoding class does not seem to have a usable constructor, but we can find several default Encoding, Encoding.default (Gets the encoding of the system's current ANSI code page), Encoding.ascii (gets 7-bit ASCII Character set encoding), Encoding.unicode (Get encoding in Unicode format in Little-endian byte order), ENCODING.UTF7 (Get encoding in UTF-7 format), Encoding.UTF8 (get Encoding of UTF-8 format). Here the main talk about the difference between Encoding.default and encoding.unicode for conversion.

In the process of converting a string into a byte array, Encoding.default will each single-byte character, such as half-width in English, instead of each double-byte character, such as Kanji. Encoding.unicode will convert them to two bytes. We can get a simple look at the conversion method, and the difference between using Encoding.default and Encodeing.unicode:

2. private void Teststringbytes () {
4. String s = "C # language";
6. Byte[] B1 = System.Text.Encoding.Default.GetBytes (s);
8. byte[] b2 = System.Text.Encoding.Unicode.GetBytes (s);
10. String t1 = " ", t2 = "";
12. foreach (Byte B in B1) {
14. T1 + = b.tostring ("") + "";
16. }
18. foreach (Byte b in B2) {
20. T2 + = b.tostring ("") + "";
22. }
24. This.textBox1.Text = "";
26. This.textBox1.AppendText ("B1. Length = "+ b1.  Length + "\ n");
28. This.textBox1.AppendText (t1 + "\ n");
30. This.textBox1.AppendText ("B2. Length = "+ b2.  Length + "\ n");
32. This.textBox1.AppendText (t2 + "\ n");
34. }

The operation result is as follows, do not say detailed, I believe everybody already understood.

1. B1. Length = 6
2. 67 35 211 239 209 212
3. B2. Length = 8
4. 67 0 35 0 237 139 0 138

Converts a C # byte array into a string, using the Encoding class's String GetString (byte[]) or a string GetString (byte[], int, int) method, which Encoding or is determined by the encoding. Add the following statement as an instance in the Teststringbytes () function:

1. byte[] bs = {97, 98, 99, 100, 101, 102};
2. String ss = System.Text.Encoding.ASCII.GetString (BS);
3. This.textBox1.AppendText ("The string is:" + SS + "\ n");

The result of the operation is: the string is:abcdef

C # byte array converted to string