c# - 字典通配符搜索

Question

我正在尝试使用通配符和 Dictionary 类创建字符串搜索

Dictionary<string, Node> Nodes = new Dictionary<string, Node>();

public bool ResponceSearch(string search) {
     if (Nodes.ContainsKey(search)) {
         label1.Text = Nodes[search].GetResult();
         return true;
     }
}

搜索字符串如

What is that

并且字典包含键，例如

Who is *
What is *

因此搜索会根据“what is that”搜索字符串找到“what is *”。

Answer 1

如果你能改变你的字典键是正确的regular expressions ，比如:

@"Who is \w+"
@"What is \w+"

那么这个问题就变得简单了很多:

public bool ResponceSearch(string search) {
     var node = 
         (from p in Nodes
          where Regex.Matches(p.Key, search)
          select p.Value)
         .FirstOrDefault();
     if (node != null) {
         label1.Text = node.GetResult();
         return true;
     }
}

您甚至可以为此编写扩展方法。例如:

public static bool ContainsKeyPattern<T>(this Dictionary<string, T> nodes, string search) 
{
     return nodes.Keys.Any(k => Regex.Matches(k, search));
}

public static T GetItemByKeyPattern<T>(this Dictionary<string, T> dict, string search) 
{
     return
         (from p in dict
          where Regex.Matches(p.Key, search)
          select p.Value)
         .First();
}