JSON serialization and deserialization (. net2.0 and. net3.5)

. Net2.0

Markerarr = "[{Name: 'apple', price: 5.5}, {Name: 'orange', price: 2.5}, {Name: 'persimmon ', price: 16}] ";

Oldlst = (list <mappointdata>) javascriptconvert. deserializeobject (markerarr, typeof (list <mappointdata>); // All page data

. Net3.5

C # deserializing a json string into a list object class set

 

Using system. IO;

Using system. Web. Script. serialization;

Using system. runtime. serialization. JSON;

Public static list <t> jsonstringtolist <t> (this string jsonstr)

{

Javascriptserializer serializer = new javascriptserializer ();

List <t> objs = serializer. deserialize <list <t> (jsonstr );

Return objs;

}

 

Public static t deserialize <t> (string JSON)

{

T OBJ = activator. createinstance <t> ();

Using (memorystream MS = new memorystream (encoding. utf8.getbytes (JSON )))

{

Datacontractjsonserializer serializer = new datacontractjsonserializer (obj. GetType ());

Return (t) serializer. readobject (MS );

}

}

Okay, let's test it.

String jsonstr = "[{Name: 'apple', price: 5.5}, {Name: 'orange', price: 2.5}, {Name: 'persimmon ', price: 16}] ";

List <product> Products = new list <product> ();

Products = jsonstringtolist <product> (jsonstr );

// Response. Write (products. Count ());

Foreach (VAR item in products)

{

Response. Write (item. Name + ":" + item. Price + "<br/> ");

}

Public class product

{

Public string name {Get; set ;}

Public double price {Get; set ;}

}

Result:

Apples: 5.5
Oranges: 2.5
Persimmon: 16

C # serialize an object into a JSON string

 

Using system. Web. Script. serialization;

Public void processrequest (httpcontext context)

{

Context. response. contenttype = "text/plain ";

 

List <product> Products = new list <product> (){

New product () {name = "apple", price = 5.5 },

New product () {name = "orange", price = 2.5 },

New product () {name = "dried persimmon", price = 16.00}

};

Productlist = new productlist ();

Productlist. getproducts = products;

Context. response. Write (New javascriptserializer (). serialize (productlist ));

}

Public bool isreusable

{

Get

{

Return false;

}

}

 

Public class product

{

Public string name {Get; set ;}

Public double price {Get; set ;}

}

 

Public class productlist

{

Public list <product> getproducts {Get; set ;}

}

 

The JSON result is as follows:

{"Getproducts": [{"name": "apple", "price": 5.5 },{ "name": "orange", "price": 2.5 }, {"name": "persimmon", "price": 16}]}