Consuming .NET JSON WebService – Part 1
The .NET WebService
On this post I’ll show you HOW-TO develop and consuming JSON Web Services using the Cappuccino Javascript Framework and .Net 2.0 / 3.5 Framework.
In first step, let’s build the JSON .Net WebService, using Microsoft or Mono Framework. To simplify this post I’ll not use the code behind.
Notes:
As we know, to use JSON on .NET WebServices we need to use the following assembly “Microsoft.Web.Extensions.dll”, and in the code we need to define the following namespaces: System.Web.Script.Services, System.Web.Script.Serialization.
Ok, let’s start writing the .Net JSON WebService (XmlJson.asmx) code:
<%@ WebService Language="C#" Class="Services.XmlJson" %>
using System;
using System.Globalization;
using System.Collections;
using System.Data;
using System.Web;
using System.Web.Services;
using System.Web.Services.Protocols;
// Script namespace from Microsoft.Web.Extensions.dll assembly
using System.Web.Script.Services;
using System.Web.Script.Serialization;
namespace Services
{
/// <summary>
/// Summary description for WebService
/// </summary>
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
// To allow this Web Service to be called from script, using ASP.NET AJAX.
[System.Web.Script.Services.ScriptService]
public class XmlJson : System.Web.Services.WebService
{
private Contact _Contact;
public XmlJson() { }
[WebMethod]
public string About()
{
return "Version 1.0";
}
[WebMethod]
// ResponseFormat is JSON
[ScriptMethod(ResponseFormat=ResponseFormat.Json)]
public string ListJSON()
{
ArrayList list = new ArrayList();
_Contact = new Contact("First Name 1", "Last Name 1");
list.Add(_Contact);
_Contact = new Contact("First Name 2", "Last Name 2");
list.Add(_Contact);
Contact[] resultList = (Contact[]) list.ToArray(typeof(Contact));
// JSON Response
JavaScriptSerializer jss = new JavaScriptSerializer();
string serializedObj = jss.Serialize(resultList);
return serializedObj;
}
}
///
/// our serializable contact class
///
[System.Xml.Serialization.SoapType(Namespace="urn:XmlJsonContacts")]
public class Contact
{
private string _firstName;
private string _lastName;
public Contact() {}
public Contact(string firstName, string lastName){
this._firstName = firstName;
this._lastName = lastName;
}
public string firstName
{
get { return this._firstName;}
set { this._firstName = value;}
}
public string lastName
{
get { return this._lastName;}
set { this._lastName = value;}
}
}
}
Download the .Net source code.
[wpdm_file id=9]