在C#中可以使用IndexOf方法來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現(xiàn)指定字符的位置,可以這樣做:
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現(xiàn)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);
}
這樣就可以查找字符串中指定字符的位置了。