Jquery Ajax JSON

Serialization character method: Pay attention to the reference"System. runtime. serializationAndSystem. servicemodel. Web"
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;

Namespace BLL
{
/// <Summary>
/// Serialize the object class
/// </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 );
}
}
}
}

Entity class:
Using system;
Using system. Collections. Generic;
Using system. LINQ;
Using system. text;

Namespace Model
{
Public class jsonitem
{
Public String username {Get; set ;}

Public String PWD {Get; set ;}
}
}

Call Method: In reflection mode, you only need to pass the method to execute
Using system;
Using system. Collections. Generic;
Using system. LINQ;
Using system. Web;
Using system. Web. Services;
Using system. text;

Namespace test. jquery. JSON
{
/// <Summary>
/// $ Codebehindclassname $ abstract description
/// </Summary>
[WebService (namespace = "http://tempuri.org/")]
[Webservicebinding (conformsto = wsiprofiles. basicprofile1_1)]
Public class JSON: ihttphandler
{

Public void processrequest (httpcontext context)
{
Context. response. contenttype = "text/plain ";
// Reflection mechanism: you only need to pass in the method to execute the method and obtain data ..
If (context. request ["cmd"]! = NULL)
{
String cmd = context. request ["cmd"];
VaR method = This. GetType (). getmethod (CMD );
If (method! = NULL)
{
Method. Invoke (this, new object [] {context });
}
}
}

/// <Summary>
/// Serialized JSON string
/// </Summary>
Public void getinfo (httpcontext context)
{
Model. jsonitem item = new model. jsonitem ();
Model. jsonitem Item1 = new model. jsonitem ();
List <model. jsonitem> List = new list <model. jsonitem> ();
Item. Username = "aaaa ";
Item. Pwd = "1111 ";
List. Add (item );
Item1.username = "BBBB ";
Item1.pwd = "2222 ";
List. Add (Item1 );
String strjson = BLL. jsonhelper. getjson <list <model. jsonitem> (list );
Context. response. Write (strjson );
}

/// <Summary>
/// Serialized JSON string
/// </Summary>
Public void getinfo1 (httpcontext context)
{
Model. jsonitem item = new model. jsonitem ();
Model. jsonitem Item1 = new model. jsonitem ();
List <model. jsonitem> List = new list <model. jsonitem> ();
Item. Username = "ABC ";
Item. Pwd = "123 ";
List. Add (item );
Item1.username = "BCD ";
Item1.pwd = "234 ";
List. Add (Item1 );
String strjson = BLL. jsonhelper. getjson <list <model. jsonitem> (list );
Context. response. Write (strjson );

// String output = string. Format ("'username': '{0}', 'pwd': '{1}'", "CCCC", "3333 ");
// String output1 = string. Format ("'username': '{0}', 'pwd': '{1}'", "dddd", "4444 ");
// Stringbuilder result = new stringbuilder ();
// Result. appendformat ("[{0} {1} {2}, {3} {4} {5}]", "{", output ,"}","{", output1 ,"}");
// Context. response. Write (result. tostring ());
// Context. response. End ();
}

Public bool isreusable
{
Get
{
Return false;
}
}
}
}

HTML code call:
<! Doctype HTML public "-// W3C // dtd xhtml 1.0 transitional // en" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<HTML xmlns = "http://www.w3.org/1999/xhtml">
<Head>
<Title> </title>

<SCRIPT src = "http://imwujianhao.blog.163.com/blog/../jquery-1.4.2.js" type = "text/JavaScript"> </SCRIPT>

<SCRIPT type = "text/JavaScript" Language = "JavaScript">
Function btnclick (){
VaR uid = $ ("# text1"). Val ();
VaR Pwd = $ ("# text2"). Val ();
$. Ajax ({
URL: "JSON. ashx ",
Type: "Post ",
Data: {cmd: "getinfo", password: Pwd },
Beforesend: Loading,
Success: function (data ){
VaR JSON = eval (data); // eval ("(" + Data + ")");
$ ("# Dd"). Empty (); // clear dd Information
$. Each (JSON, function (idx, item ){
VaR user = item. Username;
VaR pass = item. pwd;
$ ("# Dd"). append ("<B> Username:" + User + "Password:" + pass + "</B> ");
});
}

});
}
Function loading (){
$ ("# Dd" ).html (" ");
}
Function btnclick1 (){
$. Ajax ({
URL: "JSON. ashx ",
Type: "Post ",
Data: {cmd: "getinfo1 "},
Beforesend: Loading,
Success: function (data ){
// Use the eval function
VaR JSON = eval (data );
$ ("# Dd"). Empty ();
// Because the above is a list set
For (VAR I = 0; I <JSON. length; I ++ ){
$ ("# Dd "). append ("// Alert (JSON [I]. ID + "name:" + JSON [I]. Name );
}
}

});
}
</SCRIPT>

</Head>
<Body>
<Div>
<Input type = "text" name = "text1" id = "text1"/> <br/>
<Input type = "text" name = "text2" id = "text2"/>
<Br/>
<Input type = "button" id = "btn1" value = "Event 1" onclick = "btnclick ()"/>
<Input type = "button" id = "button1" value = "Event 2" onclick = "btnclick1 ()"/>
</Div>
<Div id = "DD">
SD
</Div>
</Body>
</Html>