C# 回发时，我在IE的控制台中遇到了以下错误：无法获取属性'；显示'；未定义引用或空引用？

我们的系统只在IE上工作，在过去的两年中一直在工作，但在回发时，这个错误突然出现在控制台并停止

无法获取未定义或空引用的属性“Length”

我有最新的IE版本

我使用的是asp.net webforms，在具有Autopostback=“True”的控件上，未启动并挂起浏览器

更新：

在这条线上

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this._clientStateFieldID},set_ClientStateFieldID:function(a){if(this._clientStateFieldID!=a){this._clientStateFieldID=a;this.raisePropertyChanged("ClientStateFieldID")}},get_ClientState:function(){if(this._clientStateFieldID){var b=document.getElementById(this._clientStateFieldID);if(b)return b.value}return a},set_ClientState:function(b){if(this._clientStateFieldID){var a=document.getElementById(this._clientStateFieldID);if(a)a.value=b}},registerPartialUpdateEvents:function(){var 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b=this;Sys.Extended.UI.DynamicPopulateBehaviorBase.initializeBase(b,[c]);b._DynamicControlID=a;b._DynamicContextKey=a;b._DynamicServicePath=a;b._DynamicServiceMethod=a;b._cacheDynamicResults=false;b._dynamicPopulateBehavior=a;b._populatingHandler=a;b._populatedHandler=a};Sys.Extended.UI.DynamicPopulateBehaviorBase.prototype={initialize:function(){var a=this;Sys.Extended.UI.DynamicPopulateBehaviorBase.callBaseMethod(a,c);a._populatingHandler=Function.createDelegate(a,a._onPopulating);a._populatedHandler=Function.createDelegate(a,a._onPopulated)},dispose:function(){var b=this;if(b._populatedHandler){b._dynamicPopulateBehavior&&b._dynamicPopulateBehavior.remove_populated(b._populatedHandler);b._populatedHandler=a}if(b._populatingHandler){b._dynamicPopulateBehavior&&b._dynamicPopulateBehavior.remove_populating(b._populatingHandler);b._populatingHandler=a}if(b._dynamicPopulateBehavior){b._dynamicPopulateBehavior.dispose();b._dynamicPopulateBehavior=a}Sys.Extended.UI.DynamicPopulateBehaviorBase.callBaseMethod(b,d)},populate:function(c){var b=this;if(b._dynamicPopulateBehavior&&b._dynamicPopulateBehavior.get_element()!=$get(b._DynamicControlID)){b._dynamicPopulateBehavior.dispose();b._dynamicPopulateBehavior=a}if(!b._dynamicPopulateBehavior&&b._DynamicControlID&&b._DynamicServiceMethod){b._dynamicPopulateBehavior=$create(Sys.Extended.UI.DynamicPopulateBehavior,{id:b.get_id()+"_DynamicPopulateBehavior",ContextKey:b._DynamicContextKey,ServicePath:b._DynamicServicePath,ServiceMethod:b._DynamicServiceMethod,cacheDynamicResults:b._cacheDynamicResults},a,a,$get(b._DynamicControlID));b._dynamicPopulateBehavior.add_populating(b._populatingHandler);b._dynamicPopulateBehavior.add_populated(b._populatedHandler)}b._dynamicPopulateBehavior&&b._dynamicPopulateBehavior.populate(c?c:b._DynamicContextKey)},_onPopulating:function(b,a){this.raisePopulating(a)},_onPopulated:function(b,a){this.raisePopulated(a)},get_dynamicControlID:function(){return this._DynamicControlID},get_DynamicControlID:g.get_dynamicControlID,set_dynamicControlID:function(b){var a=this;if(a._DynamicControlID!=b){a._DynamicControlID=b;a.raisePropertyChanged("dynamicControlID");a.raisePropertyChanged("DynamicControlID")}},set_DynamicControlID:g.set_dynamicControlID,get_dynamicContextKey:function(){return this._DynamicContextKey},get_DynamicContextKey:g.get_dynamicContextKey,set_dynamicContextKey:function(b){var a=this;if(a._DynamicContextKey!=b){a._DynamicContextKey=b;a.raisePropertyChanged("dynamicContextKey");a.raisePropertyChanged("DynamicContextKey")}},set_DynamicContextKey:g.set_dynamicContextKey,get_dynamicServicePath:function(){return this._DynamicServicePath},get_DynamicServicePath:g.get_dynamicServicePath,set_dynamicServicePath:function(b){var 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a=this.get_events().getHandler(e);a&&a(this,b)},add_populating:function(a){this.get_events().addHandler(f,a)},remove_populating:function(a){this.get_events().removeHandler(f,a)},raisePopulating:function(b){var a=this.get_events().getHandler(f);a&&a(this,b)}};Sys.Extended.UI.DynamicPopulateBehaviorBase.registerClass("Sys.Extended.UI.DynamicPopulateBehaviorBase",Sys.Extended.UI.BehaviorBase);Sys.Extended.UI.ControlBase=function(c){var b=this;Sys.Extended.UI.ControlBase.initializeBase(b,[c]);b._clientStateField=a;b._callbackTarget=a;b._onsubmit$delegate=Function.createDelegate(b,b._onsubmit);b._oncomplete$delegate=Function.createDelegate(b,b._oncomplete);b._onerror$delegate=Function.createDelegate(b,b._onerror)};Sys.Extended.UI.ControlBase.__doPostBack=function(c,b){if(!Sys.WebForms.PageRequestManager.getInstance().get_isInAsyncPostBack())for(var 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$addHandler(document.forms[0],"submit",d._onsubmit$delegate)},dispose:function(){var a=this;if(typeof Sys.WebForms!==b&&typeof Sys.WebForms.PageRequestManager!==b){Array.remove(Sys.Extended.UI.ControlBase.onsubmitCollection,a._onsubmit$delegate);Array.remove(Sys.WebForms.PageRequestManager.getInstance()._onSubmitStatements,a._onsubmit$delegate)}else $removeHandler(document.forms[0],"submit",a._onsubmit$delegate);Sys.Extended.UI.ControlBase.callBaseMethod(a,d)},findElement:function(a){return $get(this.get_id()+"_"+a.split(":").join("_"))},get_clientStateField:function(){return this._clientStateField},set_clientStateField:function(b){var a=this;if(a.get_isInitialized())throw Error.invalidOperation(Sys.Extended.UI.Resources.ExtenderBase_CannotSetClientStateField);if(a._clientStateField!=b){a._clientStateField=b;a.raisePropertyChanged("clientStateField")}},loadClientState:function(){},saveClientState:function(){return a},_invoke:function(i,f,j){var c=this;if(!c._callbackTarget)throw 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true}};Sys.Extended.UI.ControlBase.registerClass("Sys.Extended.UI.ControlBase",Sys.UI.Control)}if(window.Sys&&Sys.loader)Sys.loader.registerScript(b,["ComponentModel","Serialization"],a);else a()})();

（function（）{var b=“ExtendedBase”；function a（）{var b=“undefined”，f=“populating”，e=“populated”，d=“dispose”，c=“initialize”，a=null，g=this，h=Sys.version；if（！h&&！Sys.\u versionChecked）{Sys.\u versionChecked=true；抛出新错误(“AjaxControlToolkit需要ASP.NET Ajax 4.0脚本。请确保引用的脚本版本正确。如果您使用的是ASP.NET脚本管理器，请切换到AjaxControlToolkit.dll中的ToolkitScriptManager。”；}Type.registerNamespace（“Sys.Extended.UI”）；Sys.Extended.UI.BehaviorBase=function（c）{var b=this；Sys.Extended.UI.BehaviorBase.initializeBase（b[c]）；b."clientStateFieldID=a；b."pageRequestManager=a；b."partialUpdateBeginRequestHandler=a；Sys.Extended.UI.BehaviorBase.prototype={initialize:function（）{Sys.Extended.UI.BehaviorBase.callBaseMethod（this，c）}，dispose:function（）{var b=this；Sys.Extended.UI.BehaviorBase.callBaseMethod（b，d）；if（b.(pageRequestManager）{if（b.)partialUpdateBeginRequestHandler）{b.(pageRequestManager.remove)beginRequest（b.)partialUpdateBeginRequestHandler=a}if（b.(partialUpdateEndRequestHandler）{b.(pageRequestManager.remove)endRequest（b（this._clientStateFieldID）{var b=document.getElementById（this._clientStateFieldID）；if（b）return b.value}return a}，set_ClientState:function（b）{if（this._clientStateFieldID）{var a=document.getElementById（this._clientStateFieldID）；if（a）a.value=b}，registerPartialUpdateEvents:function（）{var a=this；if（Sys&&Sys.WebForms&&Sys.WebForms&&Sys.PageRequestManager）{a.。pageRequestManager=Sys.WebForms.pageRequestManager.getInstance（）；如果（a.pageRequestManager）{a.partialUpdateBeginRequestHandler=Function.createDelegate（a，a.partialUpdateBeginRequest）；a.pageRequestManager.add_beginRequest（a.partialUpdateBeginRequestHandler）；a.。partialUpdateEndRequestHandler=Function.createDelegate（a，a.partialUpdateEndRequest）；a.。pageRequestManager.add_endRequest（a.partialUpdateEndRequestHandler）}}}，partialUpdateBeginRequest:function（）{}，partialUpdateEndRequest:function（）{}；Sys.Extended.UI.BehaviorBase.registerClass（“Sys.Extended.UI.BehaviorBase”，Sys.UI.Behavior）；Sys.Extended.UI.DynamicPopulateBehaviorBase=function（c）{var b=this；Sys.Extended.UI.dynamicopulatebehaviorbase.initializeBase（b[c]）；b.。_DynamicControlID=a；b._DynamicContextKey=a；b._DynamicServicePath=a；b._DynamicServiceMethod=a；b._cachedynamicopulateBehavior=false；b._populatingHandler=a；b._populatedHandler=a}；Sys.Extended.UI.dynamicopulateBehaviorbase.prototype={initialize:function（）{var a=this；Sys.Extended.UI.DynamicPopulateBehaviorBase.callBaseMethod（a，c）；a.。_populatingHandler=function.createDelegate（a，a._onPopulated）}，dispose:function（）{var b=this；if（b.。_populatedHandler）{b.\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\；b.(dynamicPopulateBehavior=a}Sys.Extended.UI.dynamicPopulateBehavior base.callBaseMethod（b，d）}，填充：函数（c）{var b=this；如果（b.)dynamicPopulateBehavior&&b.(dynamicPopulateBehavior.get)=$get（b.(DynamicControlID））{b.(dynamicPopulateBehavior.dispose（）；b.(dynamicPopulateBehavior=a}if（！b.。\U dynamicPopulateBehavior&&b.\U DynamicControlID&&b.\U DynamicServiceMethod）{b.\U dynamicPopulateBehavior=$create（Sys.Extended.UI.dynamicPopulateBehavior，{id:b.get\U id（）+“\U dynamicPopulateBehavior”，ContextKey:b.\U DynamicContextKey，ServicePath:b.\U DynamicServiceMethod，ServiceMethod:b.\U DynamicServiceMethod，CacheResults:b.\U cacheDynamicResults}，a，$get（b.DynamicControlID））；b.dynamicPopulateBehavior.addu populating（b.populateHandler）；b.dynamicPopulateBehavior.populate（c:b.DynamicContextKey）}，on populating:function（b，a）{this.raisePopulating（a）}，函数（b，a）{this.raisePopulated（a）}，get_dynamicControlID:function（）{返回此值。_dynamicControlID}，get_dynamicControlID:g.get_dynamicControlID，set_dynamicControlID:function（b）{var a=this；if（a._dynamicControlID！=b）{a._dynamicControlID=b；a.raisePropertyChanged（“dynamicControlID”）；a.raisePropertyChanged（“dynamicControlID”）}，set_DynamicControlID:g.set_DynamicControlID，get_dynamicContextKey:function（）{返回此值。_dynamicContextKey}，get_dynamicContextKey:g.get_dynamicContextKey，set_dynamicContextKey:function（b）{var a=this；if（a._dynamicContextKey！=b）{a._dynamicContextKey=b；a.raisePropertyChanged（“dynamicContextKey”）；a.raisePropertyChanged（“dynamicContextKey”）}，set_DynamicContextKey:g.set_DynamicContextKey，get_dynamicServicePath:function（）{返回此值。_dynamicServicePath}，get_dynamicServicePath:g.get_dynamicServicePath:g.get_dynamicServicePath，set_dynamicServicePath:function（b）{var a=this；if（a._dynamicServicePath！=b）{a.\u dynamicServicePath=b；a.raisePropertyChanged（“dynamicServicePath”）；a.raisePropertyChanged（“dynamicServicePath”）}}，set_DynamicServicePath:g.set_DynamicServicePath，获取_