c#把字符转换成int

string a=“Q”;输出它的键码值81

直接int就能把char转成值
string s = "Q";
char [] cs = s.ToCharArray();//把string转成一个个的字符
foreach(char c in cs)
{
Console.WriteLine((int)c); //输出的就是字符的键码值
}

string b = string.concat(a);

//字符转数字 public static int Asc(string character) { if (character.Length == 1) { System.Text.ASCIIEncoding asciiEncoding = new System.Text.ASCIIEncoding(); int intAsciiCode = (int)asciiEncoding.GetBytes(character)[0]; return (intAsciiCode); } else { throw new Exception("Character is not valid."); } } //ASCII码转字符： public static string Chr(int asciiCode) { if (asciiCode >= 0 && asciiCode <= 255) { System.Text.ASCIIEncoding asciiEncoding = new System.Text.ASCIIEncoding(); byte[] byteArray = new byte[] { (byte)asciiCode }; string strCharacter = asciiEncoding.GetString(byteArray); return (strCharacter); } else { throw new Exception("ASCII Code is not valid."); } }