Web Service

<%@ WebService Language="C#" Class="StockTicker"%>
using System.Web.Services;
using System.Collections;

public class StockTicker: WebService {
  Hashtable tab = new Hashtable();
  
  public StockTicker() {
    tab["AMZN"] = 57.74; // Amazon
    tab["CSCO"] = 28.50; // Cisco
    tab["IBM"]  = 99.67; // IBM
    tab["MSFT"] = 28.72; // Microsoft
    tab["SUNW"] =  5.66; // Sun Microsystems
  }
  
  // return the current quote for the requested symbol
  [WebMethod]
  public double GetQuote(string symbol) {
    object quote = tab[symbol];
    if (quote == null) return 0.0; else return (double)quote;
  }
}

If this file is stored in a virtual directory with the name "samples"
one can generate a proxy with the command-line tool wsdl:

  wsdl /out:StockTicker.cs http://localhost/samples/StockTicker.asmx?WSDL

The source code of the resulting proxy class is shown here:

//------------------------------------------------------------------------------
// 
//     This code was generated by a tool.
//     Runtime Version: 1.0.3705.288
//
//     Changes to this file may cause incorrect behavior and will be lost if 
//     the code is regenerated.
// 
//------------------------------------------------------------------------------

// 
// This source code was auto-generated by wsdl, Version=1.0.3705.288.
// 
using System.Diagnostics;
using System.Xml.Serialization;
using System;
using System.Web.Services.Protocols;
using System.ComponentModel;
using System.Web.Services;


/// 
[System.Diagnostics.DebuggerStepThroughAttribute()]
[System.ComponentModel.DesignerCategoryAttribute("code")]
[System.Web.Services.WebServiceBindingAttribute(Name="StockTickerSoap", Namespace="http://tempuri.org/")]
public class StockTicker : System.Web.Services.Protocols.SoapHttpClientProtocol {
    
    /// 
    public StockTicker() {
        this.Url = "http://localhost/Samples/StockTicker.asmx";
    }
    
    /// 
    [System.Web.Services.Protocols.SoapDocumentMethodAttribute("http://tempuri.org/GetQuote", RequestNamespace="http://tempuri.org/", ResponseNamespace="http://tempuri.org/", Use=System.Web.Services.Description.SoapBindingUse.Literal, ParameterStyle=System.Web.Services.Protocols.SoapParameterStyle.Wrapped)]
    public System.Double GetQuote(string symbol) {
        object[] results = this.Invoke("GetQuote", new object[] {
                    symbol});
        return ((System.Double)(results[0]));
    }
    
    /// 
    public System.IAsyncResult BeginGetQuote(string symbol, System.AsyncCallback callback, object asyncState) {
        return this.BeginInvoke("GetQuote", new object[] {
                    symbol}, callback, asyncState);
    }
    
    /// 
    public System.Double EndGetQuote(System.IAsyncResult asyncResult) {
        object[] results = this.EndInvoke(asyncResult);
        return ((System.Double)(results[0]));
    }
}

Client Class for Invoking the Proxy

using System;

class StockTickerClient {

  public static void Main(string[] arg) {
    StockTicker ticker = new StockTicker();
    double val = ticker.GetQuote(arg[0]);
    Console.WriteLine(arg[0] + " = " + val);
  }
}

Compile the client and the proxy as follows:

csc StockTickerClient.cs StockTicker.cs

and call the client like this, for example:

StockTicker MSFT