[英]Windows Azure Mobile Service: InsertAsync
I followed the Windows Azure mobile service guide given by Microsoft over here . 在这里,我遵循了Microsoft提供的Windows Azure移动服务指南。
I create a category
class which represented the category table as follows: 我创建一个表示类别表的
category
类,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; }
}
I then inserted an entry into the database as give: 然后,我将一个条目插入到Give中:
private IMobileServiceTable<category> categoryTable = App.MobileService.GetTable<category>();
category temp = new category() { Name = "test", Posts = 1, Subscribers = 2 };
await categoryTable.InsertAsync(temp);
All worked fine till here. 到这里一切都很好。 Then i created a
users
class to represent the users table as follows: 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; }
}
Now when I try to add in a user: 现在,当我尝试添加用户时:
await userTable.InsertAsync(loggedInUser);
where logged in user is the details of the user. 登录的用户是用户的详细信息。 As given in the guide, i leave the Id filed empty and during debugging I notice that the Id is set as 0.
如指南中所述,我将ID字段保留为空,并且在调试过程中注意到ID设置为0。
I get an error: 我收到一个错误:
NewtonSoft.JSON.JsonSerializationException: {"Error getting value from 'Id' on 'NUSocial.users'."}
I have been trying fixing this for a while now but I have no clue on what is going wrong. 我已经尝试修复了一段时间,但是对于出什么问题我一无所知。
I think you'll need to apply the JSON attribute to the Id property. 我认为您需要将JSON属性应用于Id属性。 This is a sample of what my code, doing the same thing, looks like:
这是我的代码执行相同操作的示例,如下所示:
[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
});
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