一个已经写好的项目中有多个WebService，由于之前没有记录请求信息的，有时候需要查错等需要找到当次的请求信息，所以需要加入记录请求信息的功能。
首先想到的是在每一个带有WebMethod特性的方法里调用记录请求信息的方法，这样可以记录信息，但是太多带WebMethod特性的方法了，于是想在全局中拦截并捕获，于是想到了Global.asax
public class Global : System.Web.HttpApplication ???{ ???????protected void Application_Start(object sender, EventArgs e) ???????{ ???????} ???????protected void Session_Start(object sender, EventArgs e) ???????{ ???????} ???????protected void Application_BeginRequest(object sender, EventArgs e) ???????{ ???????????if (Request != null) ???????????{ ???????????????try ???????????????{ ???????????????????if (".asmx".Equals(Request.CurrentExecutionFilePathExtension,StringComparison.OrdinalIgnoreCase) && Request.ContentLength > 0) ???????????????????{ ???????????????????????using (MemoryStream ms = new MemoryStream()) ???????????????????????{ ???????????????????????????Request.InputStream.CopyTo(ms); ???????????????????????????ms.Position = 0; ???????????????????????????using (StreamReader reader = new StreamReader(ms)) ???????????????????????????{ ???????????????????????????????LogHelper.Info(reader.ReadToEnd()); ???????????????????????????} ???????????????????????} ???????????????????????????????????????????} ??????????????????????????????????} ???????????????catch (Exception) ???????????????{ ???????????????} ???????????????finally ???????????????{ ???????????????????Request.InputStream.Position = 0; ???????????????} ???????????} ???????} ???????protected void Application_AuthenticateRequest(object sender, EventArgs e) ???????{ ???????} ???????protected void Application_Error(object sender, EventArgs e) ???????{ ???????} ???????protected void Session_End(object sender, EventArgs e) ???????{ ???????} ???????protected void Application_End(object sender, EventArgs e) ???????{ ???????} ???}[WebMethod]public string HelloWorld(){ ???return "Hello World";}[WebMethod]public string QueryBalance(string username,string password){ ???if (username == "test" && password == "abcd") ???{ ???????return "1000000"; ???} ???else ???{ ???????return "用户名或密码错误"; ???}}这里使用了Log4Net将请求信息记录起来
另一种调用方式是在另一个项目中添加了WerService的引用，
public partial class WebForm1 : System.Web.UI.Page ???{ ???????protected void Page_Load(object sender, EventArgs e) ???????{ ???????????TestWebServiceSoapClient client = new TestWebServiceSoapClient(); ???????????Response.Write(client.QueryBalance("test","abcd")); ???????} ???}获取WebService的请求信息
原文地址：http://www.cnblogs.com/godbell/p/7897038.html