DocumentDB-数据类型

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📜 DocumentDB-数据类型

📅 最后修改于: 2020-11-28 13:48:36 🧑 作者: Mango

JSON或JavaScript Object Notation是一种轻量级的基于文本的开放标准，旨在供人类可读的数据交换，并且还易于计算机解析和生成。 JSON是DocumentDB的核心。我们通过网络传输JSON，将JSON存储为JSON，并索引JSON树，从而允许对完整JSON文档进行查询。

JSON格式支持以下数据类型-

S.No.	Type & Description
1	Number Double-precision floating-point format in JavaScript
2	String Double-quoted Unicode with backslash escaping
3	Boolean True or false
4	Array An ordered sequence of values
5	Value It can be a string, a number, true or false, null, etc.
6	Object An unordered collection of key:value pairs
7	Whitespace It can be used between any pair of tokens
8	Null Empty

让我们看一个简单的示例DateTime类型。将生日添加到客户类别中。

public class Customer {
   [JsonProperty(PropertyName = "id")] 
   public string Id { get; set; }
    
   // Must be nullable, unless generating unique values for new customers on client  
   [JsonProperty(PropertyName = "name")] 
   public string Name { get; set; }  
    
   [JsonProperty(PropertyName = "address")] 
   public Address Address { get; set; }  
    
   [JsonProperty(PropertyName = "birthDate")] 
   public DateTime BirthDate { get; set; } 
}

我们可以使用DateTime进行存储，检索和查询，如以下代码所示。

private async static Task CreateDocuments(DocumentClient client) {
   Console.WriteLine(); 
   Console.WriteLine("**** Create Documents ****"); 
   Console.WriteLine();
    
   var document3Definition = new Customer { 
      Id = "1001", 
      Name = "Luke Andrew", 
        
      Address = new Address { 
         AddressType = "Main Office", 
         AddressLine1 = "123 Main Street", 
         Location = new Location {
            City = "Brooklyn",
            StateProvinceName = "New York" 
         }, 
         PostalCode = "11229",
         CountryRegionName = "United States" 
      },
        
      BirthDate = DateTime.Parse(DateTime.Today.ToString()), 
   };
    
   Document document3 = await CreateDocument(client, document3Definition); 
   Console.WriteLine("Created document {0} from typed object", document3.Id); 
   Console.WriteLine(); 
}

上面的代码被编译和执行并创建文档后，您将看到现在添加了出生日期。

**** Create Documents ****  
Created new document: 1001 
{ 
   "id": "1001", 
   "name": "Luke Andrew", 
   "address": { 
      "addressType": "Main Office", 
      "addressLine1": "123 Main Street", 
      "location": { 
         "city": "Brooklyn", 
         "stateProvinceName": "New York" 
      }, 
      "postalCode": "11229", 
      "countryRegionName": "United States" 
   }, 
   "birthDate": "2015-12-14T00:00:00", 
   "_rid": "Ic8LAMEUVgAKAAAAAAAAAA==", 
   "_ts": 1450113676, 
   "_self": "dbs/Ic8LAA==/colls/Ic8LAMEUVgA=/docs/Ic8LAMEUVgAKAAAAAAAAAA==/", 
   "_etag": "\"00002d00-0000-0000-0000-566efa8c0000\"", 
   "_attachments": "attachments/" 
} 
Created document 1001 from typed object