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。
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