. Net json serialization component Json. NET

Json. NET (Newtonsoft. json) Yes. net Framework is a popular efficient json serialization open-source component.. Net Framework 2.0 to 4.5 +, and can be used.. Net environments, such as Asp.net, Silverlight, Windows Phone, and Windows 8. more features step-by-step open-source performance

Compare the performance test results of Json. NET, DataContractJsonSerializer, and JavascriptSeriallizer.

 

Reference
Method 1. Download and decompress the reference Newtonsoft. Json. dll

Method 2: Nuget Installation

PM> Install-Package Newtonsoft. Json

 

Serialization and deserialization

1. Basic usage: first reference the Newtonsoft. Json namespace and define the class with the same structure as json for conversion.

Software software = new Software {SoftID = 1,
SoftName = "free time ",
DownloadUrl = "http://itunes.apple.com/cn/app/id427577372? Mt = 8 ",
ReleaseTime = DateTime. Now
};

// Serialization
String jsonStr = JsonConvert. SerializeObject (software );

// Deserialization
Software objSoftware = JsonConvert. DeserializeObject <Software> (jsonStr );
Console. WriteLine (jsonStr); serialized output

 

 

2. Time Format processing. By default, the serialization of the DateTime type is serialized as above. This format is hard to read from other clients, or you want to format it by yourself.

Newtonsoft. Json. Converters. IsoDateTimeConverter timeConverter = new Newtonsoft. Json. Converters. IsoDateTimeConverter ();
TimeConverter. DateTimeFormat = "yyyy-MM-dd HH: mm: ss ";
Console. WriteLine (JsonConvert. SerializeObject (software, timeConverter); output result:

 

 

3. Anonymous serialization. This method can be deserialized without defining classes with the same json structure in advance.

// Json string
String jsonStr = @ "{result:-1, desc: 'parameter error. Check the format '}";

// Deserialization
Var obj = JsonConvert. DeserializeAnonymousType (jsonStr, new {result = 0, desc = string. Empty });
Console. WriteLine (string. Format ("result: {0} desc: {1}", obj. result, obj. desc ));

4. Quickly locate the node for fast processing or strings with complicated json structures, and do not want to define the corresponding transfer class, as shown in

{"Weatherinfo": {"city": "fuzhou", "city_en": "fuzhou", "date_y": "August May 4, 2013", "date ":"", "week": "Saturday", "fchh": "18", "cityid": "101230101", "temp1": "16 ℃ ~ 21 ℃ "," temp2 ":" 16 ℃ ~ 23 ℃ "," temp3 ":" 17 ℃ ~ 24 ℃ "," temp4 ":" 16 ℃ ~ 26 ℃ "," temp5 ":" 17 ℃ ~ 29 ℃ "," temp6 ":" 18 ℃ ~ 28 ℃ "," tempF1 ":" 60.8 bytes ~ 69.8 bytes "," tempF2 ":" 60.8 bytes ~ 73.4 bytes "," tempF3 ":" 62.6 bytes ~ 75.2 bytes "," tempF4 ":" 60.8 bytes ~ 78.8 bytes "," tempF5 ":" 62.6 bytes ~ 84.2 bytes "," tempF6 ":" 64.4 bytes ~ 82.4 Tib "," weather1 ":" Shower "," Weather ":" Shower Overcast "," weather3 ":" Overcast to thundershower "," weather4 ": "Shower to thundershower", "weather5": "shower to cloudy", "weather6": "Cloudy to moderate rain", "img1": "3", "img2 ": "99", "img3": "3", "img4": "2", "img5": "2", "img6": "4", "img7 ": "3", "img8": "4", "img9": "3", "img10": "1", "img11": "1", "img12 ": "8", "img_single": "3", "img_title1": "Shower", "img_title2": "Shower", "img_title3": "Shower", "img_title4 ": "Overcast", "img_title5": "Overcast", "img_title6": "thundershower", "img_title7": "Shower", "img _ Title8 ":" thundershower "," img_title9 ":" Shower "," img_title10 ":" multi cloud "," img_title11 ":" multi cloud "," img_title12 ":" moderate rain ", "img_title_single": "Shower", "wind1": "Breeze", "wind2": "Breeze", "wind3": "Breeze", "wind4": "Breeze ", "wind5": "Breeze", "wind6": "Breeze", "fx1": "Breeze", "fx2": "Breeze", "fl1 ": "less than 3", "fl2": "less than 3", "fl3": "less than 3", "fl4": "less than 3", "fl5 ": "less than 3", "fl6": "less than 3", "index": "comfortable", "index_d ": "it is recommended that you have a slim suit or denim shirt and other transitional clothes in spring and autumn. Suits and jackets are suitable for the elderly and the weak. "," Index48 ":" comfortable "," index48_d ":" It is recommended that you have a thin suit or denim shirt and other spring and autumn transitional clothes. Suits and jackets are suitable for the elderly and the weak. "," Index_uv ":" weak "," index48_uv ":" weakest "," index_xc ":" Not suitable "," index_tr ":" suitable "," index_co ": "comfortable", "st1": "19", "st2": "14", "st3": "25", "st4": "14", "st5 ": "23", "st6": "16", "index_cl": "Not suitable", "index_ls": "Not suitable", "index_ag ": "Easy to use"} Read weather1 under weatherinfo

Var obj = JObject. Parse (html );
String weather1 = (string) obj ["weatherinfo"] ["weather1"];