字符串操作

抽取和定位子串

string poem = “In Xanadu did Kubla Khan”;

string poemSeg = poem.Substring(10);

poemSeg = poem.Substring(0,9);

int index = poem.IndexOf(“I”);

index = poem.LastIndexOf(“n”);

比較字符串

bool isMatch;

string title = "Ancient Mariner";

isMatch = (title == "ANCIENT AMRINER");

isMatch = (title.ToUpper() == "ANCIENT MARINER");

isMatch = title.Equals("Ancient Mariner");