从json转换为List <object>导致异常

Question

所以这是我的问题,我有一个API设置,以JSON字符串格式返回Azure存储表的结果:

   [{
        "CustID": "f3b6.....0768bec",
        "Title": "Timesheet",
        "CalendarID": "AAMkADE5ZDViNmIyLWU3N2.....pVolcdmAABY3IuJAAA=",
        "PartitionKey": "Project",
        "RowKey": "94a6.....29a4f34",
        "Timestamp": "2018-09-02T11:24:57.1838388+03:00",
        "ETag": "W/\"datetime'2018-09-02T08%3A24%3A57.1838388Z'\""
    }, {
        "CustID": "5479b.....176643c",
        "Title": "Galaxy",
        "CalendarID": "AAMkADE5Z.......boA_pVolcdmAABZ8biCAAA=",
        "PartitionKey": "Project",
        "RowKey": "f5cc....86a4b",
        "Timestamp": "2018-09-03T13:02:27.642082+03:00",
        "ETag": "W/\"datetime'2018-09-03T10%3A02%3A27.642082Z'\""
    }]

我试图将其转换回Project对象:

public class Project : TableEntity
    {
        public Project() { }

        public Project(string rKey, string pKey = "Project")
        {
            this.PartitionKey = pKey;

            this.RowKey = rKey;
        }

        public Guid CustID { get; set; }
        public string Title { get; set; }
        public string CalendarID { get; set; }
    }

我一直收到"将值从'string'转换为'object'时出错.

我曾尝试: 这个,这个,这个,这个,这个,这个和这个,它不会工作.总是一样的错误.很明显我错过了一些东西,但已经有两天了,我似乎无法弄明白.尝试修改对象类以包含所有字段,尝试添加另一个具有list属性的类,甚至尝试将其作为Array传递.

在这一点上,我将感激任何形式的帮助.

Answer 1

问题是你有一个CustID无法反序列化的字符串Guid.

您可以使用a JsonConverter转换string为Guid反序列化(可用JSON.NET):

public class GuidJsonConverter : JsonConverter<Guid>
{
    public override void WriteJson(JsonWriter writer, Guid value, JsonSerializer serializer)
    {
        writer.WriteValue(value.ToString());
    }

    public override Guid ReadJson(JsonReader reader, Type objectType, Guid existingValue, bool hasExistingValue, JsonSerializer serializer)
    {
        string s = (string)reader.Value;

        return new Guid(s);
    }
}

两种方式使用它:

• 将转换器实例传递给DeserializeObject方法(此处示例)

• 适用[JsonConverter(typeof(GuidJsonConverter))]于CustID酒店

  [JsonConverter(typeof(GuidJsonConverter))]
  public Guid CustID { get; set; }