字符串
对字符串来说,"string".ToLower()和"string".ToUpper()可以基本满足需求,但是当需要将首字母大写的时候,这两个函数就有点不够用了.但还好,我们还有TextInfo类下的ToLittleCase方法.在使用TextInfo类时,必须指定区域性.要获得区域性,必须能够访问当前线程,从该线程中检索CurrentCulture属性.
using System;
using System.Globalization;
using System.Threading;
namespace csConsole
{
public class MyClass
{
public static void Main()
{
string title="this is my converted string";
Console.WriteLine("String Class");
Console.WriteLine("------------");
//Convert string to uppercase.
Console.WriteLine(title.ToUpper());
//Convert string to lowercase.
Console.WriteLine(title.ToLower());
Console.WriteLine();
Console.WriteLine("TextInfo Class");
Console.WriteLine("--------------");
//Get the culture property of the thread.
CultureInfo cultureInfo = Thread.CurrentThread.CurrentCulture;
//Create TextInfo object.
TextInfo textInfo = cultureInfo.TextInfo;
//Convert to uppercase.
Console.WriteLine(textInfo.ToUpper(title));
//Convert to lowercase.
Console.WriteLine(textInfo.ToLower(title));
//Convert to title case.
Console.WriteLine(textInfo.ToTitleCase(title));
}
}
}
字符
对字符来说,最初将一个字符变为小写,我是这样做的 char itemLower = Convert.ToChar(item.ToString().ToLower()) ,很傻很天真的方法.后来,我才查到char有静态方法ToUpper,ToLowwer,所以可以这样做.
char itemLower = char.ToLower(item);
char itemUpper = char.ToUpper(item);