Consuming ASMX web services from Silverlight and WPF

koolkatblog — Thu, 20 Nov 2008 18:59:28 +0000

I have just started writing some applications in Silverlight and WFP. I have many existing ASMX web services that I still need to use. Here is how you go about it.

For Silverlight:

1. Add a Service Reference to your Silverlight project . For my example, I called it ServiceReferenceTest1

2. In your code where you want to make the call, add the following code.
(Intellisense will help).
One note: The call must be asynchronous

ServiceReferenceTest1.Service1SoapClient proxy = new ServiceReferenceTest1.Service1SoapClient();

proxy.HelloWorldCompleted +=
new EventHandler(proxy_HelloWorldCompleted);

proxy.HelloWorldAsync();

3. Provide the event for the completion of the asynchronous call.
This example just returns the string “Hello World”.

    void proxy_HelloWorldCompleted(object sender,
          StationCasinosPostCards.ServiceReferenceTest1.HelloWorldCompletedEventArgs e)
    {
       String result = e.Result.ToString();
    }

For WPF:

1. Add a Service Reference but make sure you add it as a web reference.

2. Add the call ( again, Intellisense helps). My example returns a dataset.

    DataSet ds = new DataSet();
    ScratchCardServices.Service1 sr1 = new ScratchCardServices.Service1();
    ds = sr1.GetPrizeData(4408603);

Hope this helps!

Tagged: ASMX, Silverlight, WPF

Calling Web Services from Javascript using AJAX

koolkatblog — Wed, 19 Nov 2008 20:08:46 +0000

This is an example of how you can call a web service from your javascript using AJAX.

1. To begin, create a new AJAX enabled website.

2. Add a class to your project. Call it Pizza.cs and add the following code:

public Pizza(string name, string desc, double cost)
{
     this.m_name = name;
     this.m_desc = desc;
     this.m_cost = cost;
}

private string m_name;
private string m_desc;

private double m_cost; public string name { get { return this.m_name; }set { this.m_name = value; } }
public string desc { get { return this.m_desc; } set { this.m_desc = value; } }
public double cost { get { return this.m_cost; } set { this.m_cost = value; }

2. Add a web service to your project. Call it PizzaPlace.asmx and add the following 2 methods:

[WebMethod]
public int GetLocationCount(int zipCode)
{
int locations = 0;

     switch (zipCode)
     {
     case 89128:
          locations = 5;
          break;
     case 89118:
          locations = 7;
          break;
     default:
          break;
     }

return locations;
}

[WebMethod]
public List GetDeals()
{
     List pz = new List();
     Pizza p1 = new Pizza(“Pepperoni Special”, “Large Pepperoni”, 9.99);
     Pizza p2 = new Pizza(“Vegetarian”, “Large Mushroom, Onions, Peppers, Olives”, 10.99);
     pz.Add(p1);
     pz.Add(p2);

return pz;
}

4. Add the following line to your web service so that it is callable from script:

[System.Web.Script.Services.ScriptService]

Your web service code should look like this:

[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]

// add this line to enable web service to be called from javascript using AJAX //

[System.Web.Script.Services.ScriptService]
public class PizzaPlace : System.Web.Services.WebService { ……..

5. Add the following code to your Default.aspx page.

<%@ Page Language=”C#” AutoEventWireup=”true” CodeFile=”Default.aspx.cs” Inherits=”_Default” %>

http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd“>
http://www.w3.org/1999/xhtml“>

Pizza

KoolKat Curiosities

Consuming ASMX web services from Silverlight and WPF

Calling Web Services from Javascript using AJAX