Is there a function to compare a string to a larger string?

This question already has an answer here:

Case insensitive 'Contains(string)' 22 answers

---

If your search is case-sensitive, you can use Contains :

var name = "John Smith";
if(name.Contains("John"))
{
   // Name contains John
}

Or, to get all the names that contain John:

var names = new string[] {"John Smith", "Bob Smith", "Frank"};
var results = names.Where(n => n.Contains("John"));

If you want to ignore the case, you can convert both strings to lowercase:

var results = names.Where(n => n.ToLower().Contains("john"));

You could also implement your own case-insensitive Contains function as an extention method:

public static bool Contains(this string value, string substr, StringComparison c)
{
  return value.IndexOf(substr, c) >= 0;
}

Then use:

var results = names.Where(n => n.Contains("John", StringComparison.OrdinalIgnoreCase));

---

IList<string> lst = new List<string>();

lst.add("John Smith");
lst.add("Elton Johns");
lst.add("mark");
lst.add("jones");

现在要获取包含"John"的名字

var resultList = lst.Where(x => x.Contains("John")).ToList();

---

使用System.Linq

    private static List<String> GetNames(List<string> names ,string name)
    {
        return names.Where(x => x.ToLower().Contains(name.ToLower())).ToList();
    }

链接地址: http://www.djcxy.com/p/13098.html

上一篇: 禁用我的关键字搜索的区分大小写

下一篇: 有没有函数比较一个字符串与较大的字符串？