Encapsulate a class first! This category can be found on the Internet! With this class, everything will become simple, haha.
Copy codeThe Code is as follows:
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 JsonHelper ()
{
//
// TODO: Add constructor logic here
//
}
/// <Summary>
/// Serialize the object to a JSON string
/// </Summary>
/// <Typeparam name = "T"> Object Type </typeparam>
/// <Param name = "obj"> Object object </param>
/// <Returns> JSON string </returns>
Public static string GetJson <T> (T obj)
{
// Remember to add reference System. ServiceModel. Web
/**
* If the above reference is not added, System. Runtime. Serialization. Json; Json is supplied.
**/
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>
/// Restore the JSON string to an object
/// </Summary>
/// <Typeparam name = "T"> Object Type </typeparam>
/// <Param name = "szJson"> JSON string </param>
/// <Returns> Object entity </returns>
Public static T ParseFormJson <T> (string szJson)
{
T obj = Activator. CreateInstance <T> ();
Using (MemoryStream MS = new MemoryStream (Encoding. UTF8.GetBytes (szJson )))
{
DataContractJsonSerializer dcj = new DataContractJsonSerializer (typeof (T ));
Return (T) dcj. ReadObject (MS );
}
}
}
Test object class:
Copy codeThe Code is as follows:
Public class TestData
{
Public TestData ()
{
}
Public int Id {get; set ;}
Public string Name {get; set ;}
Public string Sex {get; set ;}
}
Test page:
Copy codeThe Code is as follows:
<% @ 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 = string. 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 a 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) {// use the eval function
Var json = eval (jsonStr); // The above is the list set
For (var I = 0; I <json. length; I ++ ){
Alert (json [I]. Id + "Name:" + json [I]. Name );
}
}
</Script>
<Html xmlns = "http://www.w3.org/1999/xhtml">
<Head runat = "server">
<Title> </title>
</Head>
<Body>
<Form id = "form1" runat = "server">
<Div>
</Div>
</Form>
</Body>
</Html>
Please test the conversion of json strings to entities! Everything can be done as long as there is the JsonHelper class above!
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