asp.net ajax异常处理

msdn官方示例：http://msdn.microsoft.com/zh-cn/library/bb398934%28v=VS.90%29.aspx

总的来说，

1，注册ScriptManager的AsyncPostBackError事件，并在服务器实现它，并抛出被处理过的异常（根据是否为null,可能需要抛出e.Exception或e.Exception.innerException）

2，客户端用JS来响应，Sys.WebForms.PageRequestManager.getInstance().add_endRequest(EndRequestHandler);添加处理程序

3，实现EndRequestHandler，错误信息基本在第二个参数"args“里面，

4，此时已经完成，由于网上没搜到现成文档（有的话请留言），这个args里面到底有什么经过我的枚举，暂列如下

内容比较多，我还是先把枚举的方法写出来吧：

注：下面内容是临时写的，并没有用到递归，也就是说，可能结果还不是完整的，有兴趣的可以自己拿去改造

但我们一般用到的，基本上都在了

Sys.WebForms.PageRequestManager.getInstance().add_endRequest(EndRequestHandler);



function EndRequestHandler(sender, args) {

    //if (args.get_error() != undefined) {alert(args.get_error().message.replace(/.*Exception:/,'')); args.set_errorHandled(true);  }

    if (args.get_error() != undefined) {

        var members = 'The \'args\' members are:\n\n';

        for (var i in args) {

            members += '\t' + i;

            var ai = eval("args." + i);

            if (typeof ai == "function") {

                try {

                    members += "()";

                    ai = eval("args." + i+"()");

                } catch (err) {

                    members += " not implement \n";

                    continue;

                }

            }

            members += '\n';

            if (typeof ai == "string") continue;

            for (var t in ai) {

                members += '\t\t' + t;

                if (typeof ai == "function")

                    var ait = eval("args." + i + "()." + t);

                else

                    var ait = eval("args." + i + "." + t);

                if (typeof ait == "function") {

                    try {

                        members += "()";

                        ait = eval("args." + i + "." + t + "()");

                    } catch (err) {

                        members += " not implement \n";

                        continue;

                    }

                }

                members += "\n";

                if (typeof ait == "string") continue;

                for (var m in ait) {

                    members += '\t\t\t' + m + '\n';

                }

            }

        }

        document.write("<textarea style='width:1000px; height:600px;'>"+members+"</textarea>");//members如果显示请自行处理

        args.set_errorHandled(true);

     }

}

结果：

The 'args' members are:



	_errorHandled

	_error

		message

		name

		httpStatusCode

			format

			localeFormat

			_toFormattedString

		stack

		fileName

		lineNumber

			format

			localeFormat

			_toFormattedString

		popStackFrame()

	_dataItems

	_response

		_webRequest

			_url

			_headers

			_body

			_userContext

			_httpVerb

			_executor

			_invokeCalled

			_timeout

			_events

			add_completed

			remove_completed

			completed

			_get_eventHandlerList

			get_url

			set_url

			get_headers

			get_httpVerb

			set_httpVerb

			get_body

			set_body

			get_userContext

			set_userContext

			get_executor

			set_executor

			get_timeout

			set_timeout

			getResolvedUrl

			invoke

			constructor

		_resultObject

		_xmlHttpRequest

			dispatchEvent

			removeEventListener

			onreadystatechange

			open

			readyState

			setRequestHeader

			send

			status

			responseText

			channel

			responseXML

			statusText

			abort

			getAllResponseHeaders

			getResponseHeader

			sendAsBinary

			overrideMimeType

			multipart

			mozBackgroundRequest

			withCredentials

			upload

			onuploadprogress

			onabort

			onerror

			onload

			onloadstart

			onprogress

			getInterface

		_responseAvailable

		_timedOut

		_timer

		_aborted

		_started

		_onReadyStateChange()

		_clearTimer()

		_onTimeout()

		get_timedOut()

		get_started()

		get_responseAvailable()

		get_aborted()

		executeRequest() not implement 

		getResponseHeader() not implement 

		getAllResponseHeaders() not implement 

		get_responseData() not implement 

		get_statusCode() not implement 

		get_statusText() not implement 

		get_xml() not implement 

		abort()

		constructor()

		get_webRequest()

		_set_webRequest()

		get_object() not implement 

	get_dataItems()

	get_error()

		message

		name

		httpStatusCode

		stack

		fileName

		lineNumber

		popStackFrame

	get_errorHandled()

	set_errorHandled() not implement 

	get_response()

		_webRequest

		_resultObject

		_xmlHttpRequest

		_responseAvailable

		_timedOut

		_timer

		_aborted

		_started

		_onReadyStateChange

		_clearTimer

		_onTimeout

		get_timedOut

		get_started

		get_responseAvailable

		get_aborted

		executeRequest

		getResponseHeader

		getAllResponseHeaders

		get_responseData

		get_statusCode

		get_statusText

		get_xml

		abort

		constructor()

			callBaseMethod

			getBaseMethod

			getBaseType

			getInterfaces

			getName

			implementsInterface

			inheritsFrom

			initializeBase

			isImplementedBy

			isInstanceOfType

			registerClass

			registerInterface

			resolveInheritance

			registerEnum

		get_webRequest

		_set_webRequest

		get_object

	constructor() not implement