将字符串列表组件连接成一个以逗号分隔的字符串

Question

我有一个string列表（List<String>）。我想连接列表项并形成一个新的逗号分隔字符串。我在 C# 中广为人知。请为我提供最好的解决方案。

Answer 1

string[] myList = ...
string concatenated = string.Join("," myList);

Answer 2

如果您需要创建CSV（逗号分隔值）字符串

  List<String> source = new List<String>() {
    "abc",   // just a string
    "d,e",   // string which contains comma
    "x"yz", // string which contains quotation
  };
  String result = String.Join(",", source
    .Select(x => x.Contains(',') || x.Contains('"')
      ? """ + String.Concat(x.Select(c => c == '"' ? """" : c.ToString())) + """
      : x));
  ...
  // abc,"d,e","x""yz"
  Console.Write(result);

注意添加了引号