Question

我按照Microsoft here提供的Windows Azure移动服务指南。

我创建了一个category类，它代表了类别表，如下所示：

public class category
    {
        public int Id { get; set; }

        //// TODO: Add the following serialization attribute.
        [JsonProperty(PropertyName = "name")]
        public string Name { get; set; }

        //// TODO: Add the following serialization attribute.
        [JsonProperty(PropertyName = "subscribers")] //Number of Subscribers
        public int Subscribers { get; set; }

        [JsonProperty(PropertyName = "posts")] //Number of posts inside this category
        public int Posts { get; set; }
    }

然后我在数据库中插入了一个条目：

private IMobileServiceTable<category> categoryTable = App.MobileService.GetTable<category>();
category temp = new category() { Name = "test", Posts = 1, Subscribers = 2 };
            await categoryTable.InsertAsync(temp);

直到这里一切正常。然后我创建了一个users类来表示users表，如下所示：

class users
    {
        public int Id { get; set; } //the generated ID by the mobile service.

        //// TODO: Add the following serialization attribute.
        [JsonProperty(PropertyName = "name")]
        public string Name { get; set; }

        //// TODO: Add the following serialization attribute.
        [JsonProperty(PropertyName = "nusnet")]
        public string NUSNET { get; set; }

        [JsonProperty(PropertyName = "email")]
        public string Email { get; set; }

        [JsonProperty(PropertyName = "faculty")]
        public string Faculty { get; set; }

    }

现在，当我尝试添加用户时：

await userTable.InsertAsync(loggedInUser);

登录用户是用户的详细信息。如指南中所述，我将Id文件留空，在调试期间我注意到Id设置为0。

我收到错误：

NewtonSoft.JSON.JsonSerializationException: {"Error getting value from 'Id' on 'NUSocial.users'."}

我一直试图解决这个问题一段时间，但我不知道出了什么问题。

Answer 1

我认为您需要将JSON属性应用于Id属性。这是我的代码做同样事情的示例：

[DataContract]
public class Scores
{
    [JsonProperty(PropertyName = "id")]
    [DataMember]
    public int Id { get; set; }

    [JsonProperty(PropertyName = "UserName")]
    [DataMember]
    public string UserName { get; set; }

...

                await scoresTable.InsertAsync(new Scores
                        {
                            UserName = _userName,
                            Score = (int) Score
                        });

Windows Azure移动服务：InsertAsync

1 个答案: