C# String.ToUpperInvariant 方法
csharpserver side programmingprogramming更新于 2025/9/14 6:50:00
C# 中的 String.ToUpperInvariant() 方法用于返回此 String 对象的副本，该副本使用不变文化的大小写规则转换为大写。
语法
语法如下 -
public string ToUpperInvariant ();
示例
现在让我们看一个例子 -
using System;
using System.Text;
public class Demo {
public static void Main(String[] args) {
string str1 = "one";
string str2 = "TWO";
string str3 = "ThrEE";
Console.WriteLine("String 1 = "+str1);
Console.WriteLine("String1 ToUpperInvariant = "+str1.ToUpperInvariant());
Console.WriteLine("String 2 = "+str2);
Console.WriteLine("String2 ToUpperInvariant = "+str2.ToUpperInvariant());
Console.WriteLine("String 3 = "+str3);
Console.WriteLine("String3 ToUpperInvariant = "+str3.ToUpperInvariant());
}
}
输出
String 1 = one String1 ToUpperInvariant = ONE String 2 = TWO String2 ToUpperInvariant = TWO String 3 = ThrEE String3 ToUpperInvariant = THREE
示例
using System;
public class Demo {
public static void Main(String[] args) {
string str1 = "abcd";
string str2 = "PQRS";
Console.WriteLine("String 1 = "+str1);
Console.WriteLine("String1 ToUpperInvariant = "+str1.ToUpperInvariant());
Console.WriteLine("String 2 = "+str2);
Console.WriteLine("String2 ToUpperInvariant = "+str2.ToLowerInvariant());
}
}
输出
String 1 = abcd String1 ToUpperInvariant = ABCD String 2 = PQRS String2 ToUpperInvariant = pqrs
