C#字符串属性
以下是C#中String类的属性-
获取当前String对象中指定位置的Char对象。
获取当前String对象中的字符数。
示例
让我们看一个例子-
using System;
public class Demo {
public static void Main() {
string str1 = "h8b9";
string str2 = "abcdef";
Console.WriteLine("Is string1 null or empty? = "+string.IsNullOrEmpty(str1));
Console.WriteLine("Is string2 null or empty? = "+string.IsNullOrEmpty(str2));
bool val = str1 != str2;
Console.WriteLine("Is str1 equal to str2? = "+val);
for (int i = 0; i < str1.Length; i++) {
if (Char.IsLetter(str1[i]))
Console.WriteLine(""+str1[i]+" is a letter");
else
Console.WriteLine(""+str1[i]+" is a number");
}
}
}输出结果
这将产生以下输出-
Is string1 null or empty? = False Is string2 null or empty? = False Is str1 equal to str2? = True h is a letter 8 is a number b is a letter 9 is a number
示例
现在让我们来看另一个例子-
using System;
public class Demo {
public static void Main() {
string str1 = "hijklm";
string str2 = String.Empty;
Console.WriteLine("Is string1 null or whitespace? = "+String.IsNullOrWhiteSpace(str1));
Console.WriteLine("Is string2 null or whitespace? = "+String.IsNullOrWhiteSpace(str2));
Console.WriteLine("String1 length = "+str1.Length);
Console.WriteLine("String2 length = "+str1.Length);
Console.WriteLine("String length = "+"demo".Length);
}
}输出结果
这将产生以下示例-
Is string1 null or whitespace? = False Is string2 null or whitespace? = True String1 length = 6 String2 length = 6 String length = 4