判断是否是中文、英文字符串

 1 using System;
 2 
 3 public class Example
 4 {
 5    public static void Main()
 6    {
 7         bool isChinese = false;
 8         string CString = "a.有能力的；出色的";
 9         for (int i = 0; i < CString.Length; i++)
10         {
11             if (Convert.ToInt32(Convert.ToChar(CString.Substring(i, 1)))< Convert.ToInt32(Convert.ToChar(128)))
12             {
13                 isChinese = false;
14             }
15             else
16             {
17                 isChinese = true;
18             }
19         }
20         Console.WriteLine(isChinese);
21    }
22 }
23    

 1 using System;
 2 
 3 public class Example
 4 {
 5    public static void Main()
 6    {
 7         string CString = "ability";
 8         //    正则表达式
 9         System.Text.RegularExpressions.Regex reg = new System.Text.RegularExpressions.Regex(@"^[A-Za-z]+$");
10         //    IsMatch
11         Console.WriteLine(reg.IsMatch(CString));
12    }
13 }
14