C # Gets the number of bytes in the string

Converts a string to an ASCII-encoded array, so long as the Chinese byte code is ASCII code 63 that is "?", so it can be judged

Class Stringop

{

///

Gets the actual length of the mixed string in Chinese and English (in bytes)

///

String to get the length

The actual length value of the string (number of bytes)

public int getstringlength (string str)

{

if (str. Equals (String. Empty))

return 0;

int strlen = 0;

ASCIIEncoding strdata = new ASCIIEncoding ();

Converts a string to an ASCII-encoded byte number

byte[] strbytes = strdata.getbytes (str);

for (int i = 0; I <= strbytes.length-1; i++)

{

if (strbytes[i] = = 63)//Chinese will be encoded as ASCII encoding 63, that is, "?" Resolution

strlen++;

strlen++;

}

return strlen;

}

}

Class Testmain

{

static void Main ()

{

STRINGOP sop = new Stringop ();

String str = "I love china!" I love Beijing! ";

int ilen = sop.getstringlength (str);

Console.WriteLine ("string" + str + "Bytes is:" + ilen.tostring ());

Console.readkey ();

}

}

Converts a string to a byte array in Unicode encoding, determining whether the second byte of each character is greater than 0 to calculate the number of bytes in the string

public static int Bytelenght (String str)

{

Converts a string to a byte array using Unicode encoding, which stores all strings (including English and Chinese) in 2 bytes

byte[] bytestr = System.Text.Encoding.Unicode.GetBytes (str);

int j = 0;

for (int i = 0; i < Bytestr. GetLength (0); i++)

{

The remainder of 2 is because all even-numbered elements in the byte array are the first byte of the Unicode character

if (i% 2 = 0)

{

j + +;

}

Else

{

The singular subscript is the 2nd byte of the character, and if the 2nd byte of a character is 0, the Unicode character is the English character, otherwise the Chinese characters

if (Bytestr[i] > 0)

{

j + +;

}

}

}

Return J;

}

Convert directly to bytecode get length:

byte[] Sarr = System.Text.Encoding.Default.GetBytes (s);

int len = Sarr. Length;