String类型与ASCII码的互换

一、字符串转换为ASCII:

        1）把字符（串）直接转换为int类型，即可得到ASCII码；

 　　2）再将数字转换为字符串转出；

            //把字符转换为ASCII
            //方法一：
            int asc = (int)'a';
            Console.WriteLine(asc.ToString());
            //方法二：
            string str = "a";
            byte[] bytes= System.Text.Encoding.ASCII.GetBytes(str);
            int arr = (int)bytes[0];
            Console.WriteLine(arr.ToString());
            //把字符串转换为ASCII
            String str1 = "wslkx";
            char[] char1 = str1.ToCharArray();
            //byte[] char1 = System.Text.Encoding.ASCII.GetBytes(str1);
            string conside = null;
            for(int i = 0; i < char1.Length; i++)
            {
                int asc1 = (int)(char1[i]);
                conside += asc1.ToString()+",";
                Console.WriteLine(conside);
            }
            Console.WriteLine(conside);

 

 

二、ASCII码转换为字符。

        

            //单个字符
            string alph = ((char)65).ToString();
            Console.WriteLine(alph);
            //多位字符
            string[] num = { "65", "66", "67", "68", "69" };
            string alph1 = null;
            for(int i = 0; i < num.Length; i++)
            {
                string str3 = ((char)Int32.Parse(num[i])).ToString();//需要将string类型转换为int类型
                alph1 += str3 + ",";
         
            }
            Console.WriteLine(alph1);