如何解析包含 JSON 的 csv 列？

Question

假设我有一个 csv 文件，example.csv，看起来像这样（excel 添加的双引号）：

Id,Name,requestJson
12345,Albert,"{
    ""latitude"": -43.518703,
    ""longitude"": -71.69634,
    ""tags"": [
      ""aliqua"",
      ""ad"",
      ""dolor"",
      ""culpa"",
      ""sunt"",
      ""consequat"",
      ""irure""
    ],
    ""friends"": [
      {
        ""id"": 0,
        ""name"": ""Bryan Montoya""
      },
      {
        ""id"": 1,
        ""name"": ""Marcella Tillman""
      },
      {
        ""id"": 2,
        ""name"": ""Leola Calderon""
      }
    ],
    ""greeting"": ""Hello, undefined! You have 7 unread messages."",
    ""favoriteFruit"": ""strawberry""
  }"

RequestJson 将反序列化为以下 objects:

public class Friend
{
    public int id { get; set; }
    public string name { get; set; }
}

public class Request
{
    public double latitude { get; set; }
    public double longitude { get; set; }
    public List<string> tags { get; set; }
    public List<Friend> friends { get; set; }
    public string greeting { get; set; }
    public string favoriteFruit { get; set; }
}

我的尝试从读取 example.csv 开始，跳过 headers，然后将字符串数组 values 传递给 FromCsv 以将其拆分为 Request object.

public static List<Request> LoadFiles()
{
    List<Request> requests = File.ReadAllLines("./example.csv")
                                    .Skip(1)
                                    .Select(v => FromCsv(v))
                                    .ToList();
    return requests;
}

这里我使用数组索引，因为我知道前两个元素在哪里。问题是，当我尝试检索 values[2] 时，拆分定界符失败，因为 json.

中存在转义字符和逗号

public static Request FromCsv(string csvLine)
{
    string[] values = csvLine.Split(',');
    Request request = new Request
    {
        Id = values[0],
        Name = values[1],
        Request = JsonConvert.DeserializeObject<Request>(values[2])
    };
    return request;
}

如何将 RequestJson 列解析为我想要的 Request Object？

Answer 1

谢谢@luuk。找到了可行的解决方案。

解决方案是提供最大拆分数。然后去掉csv输入的所有双引号(CsvColumnToJson)

解决方案：

public static string GetJson (string csvLine)
{
    string[] values = csvLine.Split(',', 3);
    return CsvColumnToJson(values[2]);       
}

/* Csv json formatting escapes double quotes with more double quotes and adds double quotes to the beginnning and end of the Json */
public static string CsvColumnToJson(string csvColumn)
{
    var duplicatedDoubleQuotesRemoved = csvColumn.Replace("\"\"", "\"");
    return duplicatedDoubleQuotesRemoved.Substring(0, duplicatedDoubleQuotesRemoved .Length - 1).Substring(1);
}

如何解析包含 JSON 的 csv 列？

How to parse a csv column that contains JSON?

c#

csv

json

json.net

解决方案：