WebService客户端调用错误处理

错误处理
•调用时可以提供一个额外的错误回调函数
•包括超时和服务器端抛出的异常
•超时只能设置在WebService级别
–或者设置在PageMethods对象上
–无法在每个MethodCall时指定
•Sys.Net.WebServiceError
–timedout、message、exceptionType、stackTrace属性

aspx

     < form id = " form1 "  runat = " server " >
         < asp:ScriptManager ID = " ScriptManager1 "  runat = " server " >
             < Services >
                 < asp:ServiceReference Path = " ErrorHandling.asmx "   />
             </ Services >
         </ asp:ScriptManager >
        
         < input type = " button "  value = " getDivision "  onclick = " getDivision(5, 0) "   />
         < input type = " button "  value = " timeout "  onclick = " timeout() "   />
        
         < script language = " javascript "  type = " text/javascript " >
            function getDivision(a, b)
            {
                ErrorHandling.GetDivision(a, b,  null , failedCallback);
            }
            
            function timeout()
            {
                ErrorHandling.set_timeout( 2000 );
                ErrorHandling.Timeout( null , failedCallback);
            }
            
            function failedCallback(error)
            {
                var message  =  String.format(
                     " Timeout: {0}\nMessage: {1}\nExceptionType: {2}\nStackTrace: {3} " ,
                    error.get_timedOut(),
                    error.get_message(),
                    error.get_exceptionType(),
                    error.get_stackTrace());
            
                alert(message);
            }
         </ script >
     </ form >

cs

     protected   void  Page_Load( object  sender, EventArgs e)
    {

    }

ErrorHandling.asmx

<% @ WebService Language = " C# "  Class = " ErrorHandling "   %>

using  System;
using  System.Web;
using  System.Web.Services;
using  System.Web.Services.Protocols;
using  System.Web.Script.Services;
using  System.Threading;

[WebService(Namespace  =   " http://tempuri.org/ " )]
[WebServiceBinding(ConformsTo  =  WsiProfiles.BasicProfile1_1)]
[ScriptService]
public   class  ErrorHandling  : System.Web.Services.WebService
{
    [WebMethod]
     public   int  GetDivision( int  a,  int  b)
    {
         return  a  /  b;
    }

    [WebMethod]
     public   int  Timeout()
    {
        Thread.Sleep( 5000 );
         return   0 ;
    }
}