异步调用WebServices

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

using System.Xml.Serialization;
using System.Web.Services.Protocols;
using System.Web.Services;

namespace PaymentChannel.Biz.Proxy
{
    /// <remarks/>
    [System.Diagnostics.DebuggerStepThroughAttribute()]
    [System.ComponentModel.DesignerCategoryAttribute("code")]
    [System.Web.Services.WebServiceBindingAttribute(Name = "WebServicesSoap",Namespace = "http://tempuri.org/")]
    public class VBWebServices : System.Web.Services.Protocols.soapHttpClientProtocol
    {
        /// <remarks/>
        public VBWebServices()
        {
            this.Url = "http://map.vnetone.com/showpinfo.asmx";
        }

        /// <remarks/>
        [System.Web.Services.Protocols.soapDocumentMethodAttribute("http://tempuri.org/GetMapInfoForProvice",RequestNamespace = "http://tempuri.org/",ResponseNamespace = "http://tempuri.org/",Use = System.Web.Services.Description.soapBindingUse.Literal,ParameterStyle = System.Web.Services.Protocols.soapParameterStyle.Wrapped)]
        public string GetMapInfoForProvice(string pcode)
        {
            object[] results = this.Invoke("GetMapInfoForProvice",new object[] {
                        pcode});
            return ((string)(results[0]));
        }

        /// <remarks/>
        public System.IAsyncResult BeginGetMapInfoForProvice(string pcode,System.AsyncCallback callback,object asyncState)
        {
            return this.BeginInvoke("GetMapInfoForProvice",new object[] {
                        pcode
                       },callback,asyncState);
        }

        /// <remarks/>        public void EndGetMapInfoForProvice(System.IAsyncResult asyncResult)        {            this.EndInvoke(asyncResult);        }    }}