C#中的CompareOrdinal()方法用于通过评估每个字符串中相应Char对象的数值来比较两个指定的String对象。
public static int CompareOrdinal (string str1, string str2);
上面的str1和str2是要比较的字符串。
返回值小于零,str1 <str2。如果str1 = str2,则为零。如果str1> str2,则返回大于零的值。
using System; public class Demo { public static void Main(string[] args) { string s1 = "Amy"; string s2 = "Katie"; string s3 = s2; Console.WriteLine("String1 = "+s1); Console.WriteLine("String2 = "+s2); Console.WriteLine("Are both the strings equal? = "+s1.Equals(s2)); Console.WriteLine("Are both the strings equal? = "+s2.Equals(s3)); Console.WriteLine(string.CompareOrdinal(s1, s2)); Console.WriteLine(string.CompareOrdinal(s2, s3)); } }
输出结果
String1 = Amy String2 = Katie Are both the strings equal? = False Are both the strings equal? = True -10 0
using System; public class Demo { public static void Main(string[] args) { string s1 = "David"; string s2 = "David"; string s3 = s2; string s4 = "Tom"; string s5 = s4; Console.WriteLine("String1 = "+s1); Console.WriteLine("String2 = "+s2); Console.WriteLine("String3 = "+s3); Console.WriteLine("String4 = "+s4); Console.WriteLine("String5 = "+s5); Console.WriteLine("Is s1 and s2 equal? = "+s1.Equals(s2)); Console.WriteLine("Is s2 and s3 equal? = "+s2.Equals(s3)); Console.WriteLine("Is s3 and s4 equal? = "+s3.Equals(s4)); Console.WriteLine("Is s4 and s5 equal? = "+s4.Equals(s5)); Console.WriteLine(string.CompareOrdinal(s1, s2)); Console.WriteLine(string.CompareOrdinal(s2, s3)); Console.WriteLine(string.CompareOrdinal(s3, s4)); Console.WriteLine(string.CompareOrdinal(s4, s5)); } }
输出结果
String1 = David String2 = David String3 = David String4 = Tom String5 = Tom Is s1 and s2 equal? = True Is s2 and s3 equal? = True Is s3 and s4 equal? = False Is s4 and s5 equal? = True 0 0 -16 0