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;
    }
}