Question

c#把字符转换成int

string a=“Q”;输出它的键码值81

Answer 1

//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.");
}
}

Answer 2

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
}

Answer 3

string str2 = "SessionN";

byte[] array = System.Text.Encoding.ASCII.GetBytes(str2); //array为对应的ASCII数组
string ASCIIstr2 = null;
for (int i = 0; i < array.Length; i++)
{
int asciicode = (int)(array[i]);
ASCIIstr2 += Convert.ToString(asciicode);//字符串ASCIIstr2 为对应的ASCII字符串
}