c# - System.FormatException'发生在 MongoDB.Bson.dll - XXX 不是有效的 24 位十六进制字符串

Question

我已经创建了一个这样的 C# 类:

 public class Employee
    {
        [BsonRepresentation(BsonType.ObjectId)]
        public string Name { get; set; }
        public int Age { get; set; }
        public List<string> Address { get; set; }
    }

当我尝试像这样保存这些信息(使用 MongoDB)时:

   var e = new Employee();
    e.Address = new List<string>();
    e.Address.Add("Address 1");
    e.Address.Add("Address 2");

    e.Age = 333;
    e.Name = "Some Name";

   context.Employees.Insert(e);

我收到以下错误:

An unhandled exception of type 'System.FormatException' occurred in MongoDB.Bson.dll

Additional information: 'Some Name' is not a valid 24 digit hex string.

如何使字符串字段充当 MongoDB 中的 ObjectID？

Answer 1

阅读文档:

... In this case the serializer will convert the ObjectId to a string when reading data from the database and will convert the string back to an ObjectId when writing data to the database (the string value must be a valid ObjectId) ....

请从您的字符串中删除空格。比一切都应该工作!

要证明您是否拥有有效的 ObjectId，请阅读以下 SO-Post:MongoDB Node check if objectid is valid

编辑: 最终答案是:您必须将 [BsonRepresentation(BsonType.ObjectId)] 更改为 [BsonId]