解析JSON文件并将数据插入SQL服务器

Question

I have the following JSON object and trying to create INSERT query. What is the best method create and insert the data into database? I am using JSON.NET to parse the file. I appreciate any suggestions.

JsonTextReader reader = new JsonTextReader(new StringReader(json));
while (reader.Read())
{
    if(reader.Value != null)
    Console.WriteLine("Field: {0}, Value: {1}", reader.TokenType, reader.Value);
}

Here is my JSON looks like.

{
  "persons": {
    "person": {
      "i_date":  "2014-03-20", 
      "i_location": "test", 
      "i_summary": "test test" 
    },
    "people": {
      "people1": {
        "first_name": "first name test1", 
        "last_name": "last name test1"  
      },
      "people2": {
        "first_name": "first name test2", 
        "last_name": "last name test2" 
      }, 
      "people3": {
        "first_name": "first name test3", 
        "last_name": "last name test3" 
      }
    }
  }
}

Answer 1

First I'd restructure the JSON so it made more sense. You said a "person" can have multiple "people", so structure it that way. A "person" has three attributes (ie i_date, i_location, and i_summary) and a collection of people.

{
  "person":{
    "i_date":"2014-03-20",
    "i_location":"test",
    "i_summary":"test test",
    "people":[
      {
        "first_name":"first name test1",
        "last_name":"last name test1"
      },
      {
        "first_name":"first name test2",
        "last_name":"last name test2"
      },
      {
        "first_name": "first name test3",
        "last_name":"last name test3"
      }
    ]
  }
}

Now you can declare some .NET classes that represent the structure.

public class Person2
{
    public string first_name { get; set; }
    public string last_name { get; set; }
}

public class Person
{
    public string i_date { get; set; }
    public string i_location { get; set; }
    public string i_summary { get; set; }
    public List<Person2> people { get; set; }
}

public class RootObject
{
    public Person person { get; set; }
}

Finally, use JsonConvert.DeserializeObject to get a set of object instances.

var root = JsonConvert.DeserializeObject<RootObject>( json );

You can now iterate over the "people" attached to the "person" and do stuff with it.

Console.WriteLine( root.person.i_date );
Console.WriteLine( root.person.i_location );
Console.WriteLine( root.person.i_summary );

foreach(var p in root.person.people)
{
    Console.WriteLine( p.first_name );
    Console.WriteLine( p.last_name );
}

At this point you can use either ADO.NET or Entity Framework to transfer the values from the objects into either SQL Parameters (ADO.NET) or EF classes to persist it into the database.