Question

#table1#
pid  property   address
1    property1  Ashfield
2    property2  Burwood

#table2#
id  images pid
1   img1   1
2   img2   1
3   img3   2

如何使用c＃using asp.net生成如上表所示的json数据？

property[
   {
   id: 1,
   property: property1,
   address: Ashfield,
   images:[
       images: img1,
       images: img2
   ]},
   id: 2,
   property: property2,
   address: Burwood,
   images:[
       images: img3
   ]}
]

Answer 1

只需将嵌套对象构造为类，然后序列化为JSON。

只要您可以将JSON对象表示为类结构，就可以将easilly转换为/从中转换。

[Table(name="address")]
public class Address{
  [Datamember(Name="images")]
  public IEnumerable<Image> Images{get;set;}
}

Answer 2

using (var ctx = new DatabaseEntities())
            {
                var prop = from p in ctx.properties.Include("images")
                           select new
                           {
                               id = p.pid,
                               address = p.address,
                               property = p.property1,
                               images = (from img in p.images select new { images = img.images})
                           };

                var javaScriptSerializer = new System.Web.Script.Serialization.JavaScriptSerializer();
                string jsonString = javaScriptSerializer.Serialize(prop.ToList());

                Console.WriteLine(jsonString);
            }

Json returned from the above code is:

[
   {
      "id": 1,
      "address": "Ashfield",
      "property": "property1",
      "images": [
         {
            "images": "img1"
         },
         {
            "images": "img2"
         }
      ]
   },
   {
      "id": 2,
      "address": "Burwood",
      "property": "property2",
      "images": [
         {
            "images": "img3"
         }
      ]
   }
]

Answer 3

谢谢你的回答。我有这个代码

DataTable dataTable = blproperty.PropertyAll();

        JavaScriptSerializer jsSerializer = new JavaScriptSerializer();  
        List > parentRow = new List > ();  
        Dictionary  childRow;  
        foreach(DataRow row in dataTable.Rows) 
        {  
            childRow = new Dictionary  ();  
            foreach(DataColumn col in dataTable.Columns) 
            {  
                childRow.Add(col.ColumnName, row[col]);  
            }  
            parentRow.Add(childRow);  
        }  
        context.Response.Write(jsSerializer.Serialize(parentRow));

有没有简单的方法来修改它？

从两个数据库表生成嵌套的json数据

3 个答案: