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
ErrorHandling.asmx Code:
<%@ 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;
}
}
3_ErrorHandling.aspx Code:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="3_ErrorHandling.aspx.cs" Inherits="_3_ErrorHandling" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<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()" />
<mce: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
