如何使用 C# 将小写字符转换为大写
在 C# 中,使用 ToUpper()
方法可以将小写字符转换为大写。该方法返回一个新字符串,其中所有小写字符都已转换为大写字符。
语法:
string uppercaseString = lowercaseString.ToUpper();
示例:
以下代码段说明了如何使用 ToUpper()
方法将小写字符串转换为大写:
string lowercase = "hello world"; string uppercase = lowercase.ToUpper(); Console.WriteLine(uppercase); // 输出:HELLO WORLD
注意:
-
ToUpper()
方法不修改原始字符串。它返回一个包含转换后字符串的新字符串。 - 该方法将所有小写字符转换为大写字符,包括 ASCII 和 Unicode 字符。
- 如果字符串中不包含小写字符,则
ToUpper()
方法将返回与原始字符串相同的新字符串。
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