Asp. NET self-with object JSON string and entity class conversion _ Practical Tips

For more information on JSON, please Google understand! If you want me to write, I also go to Google after copy! Hey, always want to learn json, a lot of looking for information and write demo, finally a little understand! Cut to the Chase!

Let's first encapsulate a class! This kind of online can be found! There's this class, everything will be easy, haha.

 Using System;
Using System.Collections.Generic;
Using System.Linq;
Using System.Web;
Using System.Runtime.Serialization.Json;
Using system.servicemodel.web;///Remember to reference this namespace using System.IO;
Using System.Text; <summary>///Summary description for Jsonhelper///</summary> public class Jsonhelper {public Jsonhel Per () {/////Todo:add constructor logic-here//}///<summary>///serializes the object to the JSON string/// ;/summary>///<typeparam name= "T" > Object type </typeparam>///<param name= "obj" > Object entity </param>// /<returns>json string </returns> public static string getjson<t> (T obj) {//Remember to add Reference System.servicemo Del. Web/** * If the above reference is not added, System.Runtime.Serialization.Json;
    JSON doesn't come out. * * * * * * * * * datacontractjsonserializer JSON = new DataContractJsonSerializer (typeof (T)); using (MemoryStream ms = new MemoryStream ()) {json.
      WriteObject (MS, obj); String Szjson = Encoding.UTF8.GetStrinG (Ms.
      ToArray ());
    return Szjson; }///<summary>///restores JSON string to object///</summary>///<typeparam name= "T" > Object type </typeparam&
  Gt <param name= "Szjson" >json string </param>///<returns> object entity </returns> public static T Parseform
    Json<t> (String szjson) {T obj = activator.createinstance<t> (); using (MemoryStream ms = new MemoryStream (Encoding.UTF8.GetBytes (Szjson)) {DataContractJsonSerializer DCJ = n
      EW DataContractJsonSerializer (typeof (T)); Return (T) DCJ.
    ReadObject (MS);
 }
  }
}

To test an entity class:

public class TestData
{public
  TestData ()
  {
  } public
  int Id {get; set;}
  public string Name {get; set;}
  public string Sex {get; set;}
} 

Test page:

<%@ Page language= "C #"%> <! DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 transitional//en" "Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd "> <script runat=" Server "> protected void Page_Load (object sender, EventArgs e) {string jsonstr = Strin
    G.empty;
    list<testdata> TDS = new list<testdata> (); Test data for (int i = 1; i < 4; i++) {TDs.
    ADD (New TestData () {Id = i, Name = "Jinho" + I, Sex = "Male"});
    ///Convert a List to JSON string jsonstr = jsonhelper.getjson<list<testdata>> (TDS);
    Response.Write (JSONSTR); This. Page.ClientScript.RegisterStartupScript (this.
  GetType (), "JSON", "Getjson (" + Jsonstr + ");", true); } </script> <script type= "Text/javascript" > Function Getjson (jsonstr) {//using the Eval function var json = eval     (JSONSTR); Because the list is set for (var i = 0; i < json.length i++) {alert (json[i). Id + "Name:" + json[i].
    Name); }} </script>  

About JSON string conversions to entities please test it yourself! As long as there is the Jsonhelper class, everything is good to do!

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