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調(diào)用Webservice的方法一般是通過右擊項(xiàng)目--》添加服務(wù)引用--》輸入Webservice地址--》前往--》確定,，這樣可以順利調(diào)用服,，但是需要注意的一點(diǎn)是：如果上面的方法是在非啟動(dòng)項(xiàng)項(xiàng)目（比如某個(gè)類庫）中添加的，在該項(xiàng)目下會(huì)自動(dòng)生成一個(gè)app.config文件,，而在主配置文件web.config中并沒有自動(dòng)添加上該webservice的標(biāo)記,，這樣運(yùn)行會(huì)出現(xiàn)錯(cuò)誤，說找不到配置信息等等……所有還需要把a(bǔ)pp.config中的<system.serviceModel>……</system.serviceModel>這段配置添加到web.config的<configuration>……</configuration>標(biāo)記中,，這樣運(yùn)行就不會(huì)出問題了,。如果以后服務(wù)地址發(fā)生了變化，也只需要修改web.config中的地址就行了,。
如果你覺得上面的方法含麻煩的話,，你可以選擇下面的方法：動(dòng)態(tài)WebService方法。需要寫一個(gè)底層解析Webservice服務(wù)地址的方法,，然后調(diào)用就可以,，很方便。服務(wù)地址你可以配置到web.config中,，也可以保存到數(shù)據(jù)庫中,，隨你了……
下面通過一個(gè)判斷騰訊QQ在線狀態(tài)的例子說明一下動(dòng)態(tài)WebService的方法。
騰訊QQ在線狀態(tài)WEB 服務(wù)：http://webservice./webservices/qqOnlineWebService.asmx
方法：qqCheckOnline 獲得騰訊QQ在線狀態(tài)
輸入?yún)?shù)：QQ號(hào)碼 String,，默認(rèn)QQ號(hào)碼：8698053,。返回?cái)?shù)據(jù)：String，Y = 在線,；N = 離線,；E = QQ號(hào)碼錯(cuò)誤；A = 商業(yè)用戶驗(yàn)證失??；V = 免費(fèi)用戶超過數(shù)量
 using System;
using System.Collections;
using System.Reflection;
using System.Web.Services;
using System.Web.Services.Protocols;
using System.Web.Services.Description;
using System.CodeDom;
using System.CodeDom.Compiler;
using System.Net;
using System.Web;
namespace Kayang.WebService
{
/// <summary>
/// WebServiceProxy 的摘要說明。
/// </summary>
public sealed class WebServiceProxy
{
private static Hashtable _assenblyCache = null; //緩存提高效率
public WebServiceProxy()
{
}
//url:服務(wù)地址
//methodname：方法名字
//args:方法的參數(shù)
public static object InvokeWebservice(string url, string nsClassName, string methodname, params object[] args)
{
return InvokeWebservice(url, nsClassName, methodname, 100000, args);
}
public static object InvokeWebservice(string url, string nsClassName, string methodname, int timeout, params object[] args)
{
if (args.Length == 1 && args[0] is ArrayList)
{
args = (args[0] as ArrayList).ToArray();
}
try
{
int li = nsClassName.LastIndexOf('.');
string @namespace = (li == -1 ? "" : nsClassName.Substring(0, li));
Assembly assembly;
if (_assenblyCache == null)
{
_assenblyCache = new Hashtable();
}
if (_assenblyCache.ContainsKey(url.ToUpper()))
{
assembly = (Assembly)_assenblyCache[url.ToUpper()];
}
else
{
System.Net.WebClient wc = new System.Net.WebClient();
System.IO.Stream stream = wc.OpenRead(url + "?WSDL");
//Configuration.SoapEnvelopeProcessingElement se = new Configuration.SoapEnvelopeProcessingElement();
//se.ReadTimeout = 15000;
ServiceDescription sd = ServiceDescription.Read(stream);
ServiceDescriptionImporter sdi = new ServiceDescriptionImporter();
sdi.AddServiceDescription(sd, "", "");
CodeNamespace cn = new CodeNamespace(@namespace);
CodeCompileUnit ccu = new CodeCompileUnit();
ccu.Namespaces.Add(cn);
sdi.Import(cn, ccu);
Microsoft.CSharp.CSharpCodeProvider csc = new Microsoft.CSharp.CSharpCodeProvider();
ICodeCompiler icc = csc.CreateCompiler();
CompilerParameters cplist = new CompilerParameters();
cplist.GenerateExecutable = false;
cplist.GenerateInMemory = true;
cplist.ReferencedAssemblies.Add("System.dll");
cplist.ReferencedAssemblies.Add("System.XML.dll");
cplist.ReferencedAssemblies.Add("System.Web.Services.dll");
cplist.ReferencedAssemblies.Add("System.Data.dll");
CompilerResults cr = icc.CompileAssemblyFromDom(cplist, ccu);
if (true == cr.Errors.HasErrors)
{
System.Text.StringBuilder sb = new System.Text.StringBuilder();
foreach (CompilerError ce in cr.Errors)
{
sb.Append(ce.ToString());
sb.Append(System.Environment.NewLine);
}
throw new Exception(sb.ToString());
}
assembly = cr.CompiledAssembly;
_assenblyCache[url.ToUpper()] = assembly;
}
Type t = null;
if (String.IsNullOrEmpty(nsClassName))
{
t = assembly.GetTypes()[0];
}
else
{
t = assembly.GetType(nsClassName, true, true);
}
MethodInfo mi = null;
if (String.IsNullOrEmpty(methodname))
{
mi = t.GetMethods(BindingFlags.DeclaredOnly | BindingFlags.Public | BindingFlags.Instance)[0];
}
else
{
mi = t.GetMethod(methodname);
}
SoapHttpClientProtocol obj = Activator.CreateInstance(t) as SoapHttpClientProtocol;
SetCookie(url, obj);
//obj.Credentials = System.Net.CredentialCache.DefaultNetworkCredentials;
obj.Timeout = timeout;
return mi.Invoke(obj, args);
}
catch (Exception ex)
{
throw new Exception(ex.InnerException.Message, new Exception(ex.InnerException.StackTrace));
}
}
/// <summary>
/// 傳入Cookie,，使對(duì)方可以使用當(dāng)前Session
/// By 黃正 2009-12-6
/// </summary>
/// <param name="url"></param>
/// <param name="obj"></param>
private static void SetCookie(string url, SoapHttpClientProtocol obj)
{
HttpContext ctx = HttpContext.Current;
if (ctx != null)
{
CookieContainer cc = new CookieContainer();
foreach (string cookieName in ctx.Request.Cookies.AllKeys)
{
cc.SetCookies(new Uri(url), cookieName + "=" + ctx.Request.Cookies[cookieName].Value);
}
//req.Headers.Add(HttpRequestHeader.Cookie, Request.Headers["Cookie"]);
obj.CookieContainer = cc;
}
}
}
}
調(diào)用：
string url = "http://webservice./webservices/qqOnlineWebService.asmx";
string @namespace="";
string methodname = "qqCheckOnline";//需要調(diào)用的webservice中的方法
string Invoke = "123456";//QQ號(hào)碼
string result = WebService.WebServiceProxy.InvokeWebservice(url, @namespace, methodname, Invoke).ToString();
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