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在C#中可以使用IndexOf方法来查找字符串中指定字符的位置。例如,要查找字符串中第一次出现指定字符的位置,可以这样做:
string str = "Hello World"; char searchChar = 'o'; int position = str.IndexOf(searchChar); if (position != -1) { Console.WriteLine("The position of '{0}' in the string is: {1}", searchChar, position); } else { Console.WriteLine("The character '{0}' was not found in the string.", searchChar); }
如果要查找字符串中最后一次出现指定字符的位置,可以使用LastIndexOf方法:
string str = "Hello World"; char searchChar = 'o'; int position = str.LastIndexOf(searchChar); if (position != -1) { Console.WriteLine("The last position of '{0}' in the string is: {1}", searchChar, position); } else { Console.WriteLine("The character '{0}' was not found in the string.", searchChar); }
这样就可以查找字符串中指定字符的位置了。