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";
 }
}

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"));
  }
 }