如何在C＃中更改字符串格式

Question

如何更改字符串格式。 MATCH (city1:City {name: 'Foo'}) OPTIONAL MATCH (st:Street {streetName: 'streetName1'})-[:BELONGS_TO]->(city1) FOREACH(x IN CASE WHEN st IS NULL THEN [1] END | CREATE (st2:Street {streetName: 'streetName1'})-[:BELONGS_TO]->(city1)) 至 2,4,6,9

[2],[4],[6],[9]

结果我得到 int[] terms = termsList.ToArray(); var result = string.Join(",", terms); ，但我想得到2,4,6,9格式

Answer 1

那

string result = String.Join(",", terms.ToList().ConvertAll(i => "["+i.ToString()+"]"));

优雅的方法是

string result = String.Join(",", terms.Select(x => "[" + x + "]"));

我喜欢这个，

string result = string.Join(",", Array.ConvertAll(terms, s => $"[{s}]"));

POC：.net Fiddle

Answer 2

您可以使用LINQ和字符串插值：

var terms = new []{ 2, 4, 6, 9 };
var str = string.Join(",", terms.Select(x => $"[{x}]"));

结果

  

[2]，[4]，[6]，[9]