首先，让我向您展示我在屏幕上看到的异常。
The control 'Store1' does not have an DirectEvent with the name 'DataChanged' or the handler is absent
我的项目中有一些页面，当我进入页面“A”并更改到页面“B”然后点击退格（所以我转到我最后一页）时，我得到了这个错误。但是如果我转到页面“B”并改回“A”，我就不会有错误。
我注意到，当错误发生时，我添加的列不存在，并且因为当页面没有回发时发生对ext.Store的绑定，所以我无法看到已经过的值。
现在，这是保存ext.Store的网格：
<ext:GridPanel id="GridPanel1" idmode="Explicit" runat="server" autoheight="true"
title="Solicitações" autoexpandcolumn="Descricao">
<Store>
<ext:Store ID="Store1" runat="server" GroupField="solCodigo" GroupOnSort="true">
<Reader>
<ext:JsonReader IDProperty="solCodigo">
<Fields>
<ext:RecordField Name="solCodigo" SortDir="DESC" />
<ext:RecordField Name="solDescricao" Type="String" />
<ext:RecordField Name="solStatus" Type="String" />
<ext:RecordField Name="proDescricao" Type="String" />
<ext:RecordField Name="solDataSolicitacao" Type="Date" />
<ext:RecordField Name="solDataPrevista" Type="Date" />
<ext:RecordField Name="solNumArquivos" />
<ext:RecordField Name="funNomeSolucionador" Type="String" />
<ext:RecordField Name="solPrioridade" />
<ext:RecordField Name="solDataSolucao" Type="String" />
</Fields>
</ext:JsonReader>
</Reader>
</ext:Store>
</Store>
<View>
<%--
<ext:GroupingView runat="server" HideGroupedColumn="true" EmptyGroupText="Indefinido" ID="groupingView1" EnableGrouping="false" EnableGroupingMenu="false">
<GetRowClass Fn="getRowClass" />
</ext:GroupingView>--%>
</View>
<ColumnModel runat="server">
<Columns>
<ext:Column DataIndex="solCodigo" Header="Código" Width="40">
</ext:Column>
<ext:Column ColumnID="Descricao" Header="Descrição" DataIndex="solDescricao">
<Renderer Format="Ellipsis" FormatArgs="50" />
<Commands>
<ext:ImageCommand CommandName="Comando" />
</Commands>
<PrepareCommand Fn="prepareCellCommand" />
</ext:Column>
<ext:DateColumn Header="Solicitado em" DataIndex="solDataSolicitacao">
</ext:DateColumn>
<ext:DateColumn Header="Data prevista" DataIndex="solDataPrevista">
</ext:DateColumn>
<ext:Column ColumnID="Projeto" Header="Projeto" DataIndex="proDescricao">
</ext:Column>
<ext:Column Header="Situação" DataIndex="solStatus">
<Renderer Fn="situacaoRender" />
</ext:Column>
<ext:Column Header="Data de Solução" DataIndex="solDataSolucao">
</ext:Column>
<ext:Column Header="Prioridade" DataIndex="solPrioridade">
<Renderer Fn="prioridadeRender" />
</ext:Column>
</Columns>
</ColumnModel>
<DirectEvents>
<DblClick OnEvent="GridPanel1_DblClick" Before="if(#{GridPanel1}.getSelectionModel().getSelected() == undefined) return false; ">
<EventMask ShowMask="true" />
<ExtraParams>
<%-- or can use params[2].id as value --%>
<%-- <ext:Parameter Name="id" Value="#{GridPanel1}.getSelectionModel().getSelected().id;"
Mode="Raw" />--%>
<ext:Parameter Name="Values" Value="Ext.encode(#{GridPanel1}.getRowsValues({selectedOnly:true}))"
Mode="Raw" />
</ExtraParams>
</DblClick>
</DirectEvents>
<Plugins>
<%-- <ext:RowExpander ID="RowExpander1" runat="server" >
<Template ID="Template1" runat="server">
<Html>
<p><b>Detalhes:</b> {solDescricao}</p>
<p><b>Arquivos:</b> {solNumArquivos}</p>
</Html>
</Template>
</ext:RowExpander>--%>
</Plugins>
<SelectionModel>
<ext:RowSelectionModel runat="server" SingleSelect="true" />
</SelectionModel>
</ext:GridPanel>
它如何约束
DataTable dtSol = new DataTable();
dtSol = sol.Listar();
DataTable dtResult = new DataTable();
dtResult.Columns.Add("solCodigo", typeof(int));
dtResult.Columns.Add("solDescricao", typeof(string));
dtResult.Columns.Add("solDataSolicitacao", typeof(DateTime));
dtResult.Columns.Add("solDataPrevista", typeof(DateTime));
dtResult.Columns.Add("proDescricao", typeof(string));
dtResult.Columns.Add("solStatus", typeof(string));
dtResult.Columns.Add("solPrioridade", typeof(int));
dtResult.Columns.Add("solDataSolucao", typeof(string));
var result = from r in dtSol.AsEnumerable()
select dtResult.LoadDataRow(new object[]
{
r.Field<int>("solCodigo"),
r.Field<string>("solDescricao"),
r.Field<DateTime>("solDataSolicitacao"),
r.Field<DateTime>("solDataPrevista"),
r.Field<string>("proDescricao"),
r.Field<string>("solStatus"),
r.Field<int>("solPrioridade"),
r.Field<DateTime>("solDataSolucao") > DateTime.Now.AddMinutes(1) ? string.Empty : r.Field<DateTime>("solDataSolucao").ToString("dd/MM/yyyy")
}, false);
this.Store1.DataSource = result.ToList().Any() ? dtResult : new DataTable();
this.Store1.DataBind();
提前致谢。
编辑用户请求
protected void GridPanel1_DblClick(object sender, DirectEventArgs e)
{
//string ID = e.ExtraParams["id"];
string json = e.ExtraParams["Values"];
json = json.Replace("solNumArquivos\":\"\"", "solNumArquivos\":0");
clSolicitacao sol = JSON.Deserialize<List<clSolicitacao>>(json).First();
if (sol.solStatus == "DF")
{
Response.Redirect("Chamado.aspx?codigo=" + sol.solCodigo);
}
else
{
Response.Redirect("ExibirChamado.aspx?codigo=" + sol.solCodigo);
}
}
编辑2
Ext.onReady(function(){Ext.QuickTips.init();Ext.apply(Ext.net.DirectMethods, { EfetuaLogout:function(blnLogout,config){Ext.net.DirectMethod.request("EfetuaLogout",Ext.applyIf(config || {}, {params:{blnLogout:blnLogout}}));} });new Ext.net.LinkButton({id:"menuBuscar",labelAlign:"top",renderTo:"menuBuscar_Container",width:50,arrowAlign:"bottom",iconAlign:"top",iconCls:"icon-magnifier",menu:{id:"ctl00",xtype:"menu",width:140,items:[{id:"ctl01",xtype:"menutextitem",text:"Código:"},{id:"txtBusca",xtype:"textfield",autoCreate:{"tag":"input","type":"text","maxlength":7,"autocomplete":"off"},maxLength:7,directEvents:{specialkey:{fn:function(el,e){var params=arguments;Ext.net.DirectEvent.confirmRequest({formProxyArg:"Form1",eventMask:{showMask:true,msg:"Buscando solicitações..."},before:function(el, type, action, extraParams){return e.getKey() == Ext.EventObject.ENTER;},control:this,action:'SpecialKey'});},delay:20}}},{id:"ctl02",iconCls:"icon-magnifier",text:"Buscar",directEvents:{click:{fn:function(el,e){var params=arguments;Ext.net.DirectEvent.confirmRequest({formProxyArg:"Form1",eventMask:{showMask:true,msg:"Buscando solicitações..."},control:this});},delay:20}}}]},text:"Buscar solicitação"});new Ext.net.GridPanel({store:this.Store1=new Ext.ux.data.PagingStore({proxyId:"Store1",autoLoad:true,reader:new Ext.data.JsonReader({fields:[{name:"solCodigo",sortDir:"DESC"},{name:"solDescricao",type:"string"},{name:"solStatus",type:"string"},{name:"proDescricao",type:"string"},{name:"solDataSolicitacao",type:"date",dateFormat:"Y-m-dTh:i:s"},{name:"solDataPrevista",type:"date",dateFormat:"Y-m-dTh:i:s"},{name:"solNumArquivos"},{name:"funNomeSolucionador",type:"string"},{name:"solPrioridade"}],idProperty:"solCodigo"}),directEventConfig:{formProxyArg:"Form1"},groupField:"solCodigo",groupOnSort:true,proxy:new Ext.data.PagingMemoryProxy([{"solCodigo":2213,"solDataSolicitacao":"2013-04-16T11:16:23","solDataPrevista":"2013-04-17T11:16:23","solPrioridade":3,"solDescricao":"Gostaria de ter acesso a base dbCOEServiceDesk do servidor BRSPTP09.\r\n\r\nO motivo do pedido é para poder aplicar testes e implementar o próprio sistema do ServiceDesk assim como foi relatado nas pendências relatadas pelo Silva, Paulo Roberto da.\r\n\r\nO usuário para qual o acesso é solicitado é " aseixas ". O mesmo do solicitante deste chamado.\r\n\r\nGrato.","solStatus":"SP","proDescricao":"CrCt(Petrobrás) - SP","funNomeSolucionador":"DANIELA BRITO COSTA ","solNumArquivos":0},{"solCodigo":2214,"solDataSolicitacao":"2013-05-10T15:33:11","solDataPrevista":"2013-05-11T15:33:11","solPrioridade":3,"solDescricao":"sdfgdf","solStatus":"SF","proDescricao":"Consiste","funNomeSolucionador":"ANDRE SILVA DE SEIXAS ","solNumArquivos":0},{"solCodigo":2215,"solDataSolicitacao":"2013-05-13T13:43:34","solDataPrevista":"2013-05-14T13:43:34","solPrioridade":3,"solDescricao":"abc","solStatus":"SP","proDescricao":null,"funNomeSolucionador":null,"solNumArquivos":0},{"solCodigo":2216,"solDataSolicitacao":"2013-05-13T13:45:06","solDataPrevista":"2013-05-14T13:45:06","solPrioridade":3,"solDescricao":"abc","solStatus":"SP","proDescricao":null,"funNomeSolucionador":null,"solNumArquivos":0},{"solCodigo":2217,"solDataSolicitacao":"2013-05-13T13:47:01","solDataPrevista":"2013-05-14T13:47:01","solPrioridade":3,"solDescricao":"abc","solStatus":"SP","proDescricao":null,"funNomeSolucionador":null,"solNumArquivos":0},{"solCodigo":2218,"solDataSolicitacao":"2013-05-13T13:52:43","solDataPrevista":"2013-05-14T13:52:43","solPrioridade":3,"solDescricao":"asdf","solStatus":"SP","proDescricao":"Connector","funNomeSolucionador":null,"solNumArquivos":0},{"solCodigo":2219,"solDataSolicitacao":"2013-05-13T13:56:17","solDataPrevista":"2013-05-14T13:56:17","solPrioridade":3,"solDescricao":"asd","solStatus":"SP","proDescricao":"Connector","funNomeSolucionador":null,"solNumArquivos":0}], false),directEvents:{datachanged:{fn:function(store){var params=arguments;Ext.net.DirectEvent.confirmRequest({formProxyArg:"Form1",control:this,action:'DataChanged'});},delay:20}}}),id:"GridPanel1",renderTo:"GridPanel1_Container",autoHeight:true,title:"Solicitações",autoExpandColumn:"Descricao",sm:this.ContentPlaceHolder1_ctl00=new Ext.grid.RowSelectionModel({proxyId:"",singleSelect:true}),selectionMemory:false,cm:this.ContentPlaceHolder1_ctl01=new Ext.grid.ColumnModel({proxyId:"",defaultSortable:true,columns:[{dataIndex:"solCodigo",header:"Código",width:40},{dataIndex:"solDescricao",header:"Descrição",id:"Descricao",renderer:function(value){return Ext.util.Format.ellipsis(value,50);},commands:[{command:"Comando"}],isCellCommand:true,prepareCommand:prepareCellCommand},{dataIndex:"solDataSolicitacao",header:"Solicitado em",xtype:"datecolumn",format:"d/m/Y"},{dataIndex:"solDataPrevista",header:"Data prevista",xtype:"datecolumn",format:"d/m/Y"},{dataIndex:"proDescricao",header:"Projeto",id:"Projeto"},{dataIndex:"solStatus",header:"Situação",renderer:situacaoRender},{dataIndex:"solPrioridade",header:"Prioridade",renderer:prioridadeRender}]}),directEvents:{dblclick:{fn:function(e){var params=arguments;Ext.net.DirectEvent.confirmRequest({formProxyArg:"Form1",extraParams:{Values:Ext.encode(GridPanel1.getRowsValues({selectedOnly:true}))},eventMask:{showMask:true},before:function(el, type, action, extraParams){if(GridPanel1.getSelectionModel().getSelected() == undefined) return false; },control:this,action:'DblClick'});},delay:20}}});new Ext.Window({id:"wndChromeWarning",hidden:true,renderTo:Ext.get("Form1"),height:220,width:400,closable:false,buttons:[{id:"ctl03",xtype:"button",text:"Fechar aviso",listeners:{click:{fn:function(el,e){wndChromeWarning.hide()}}}}],header:false,padding:25,contentEl:"wndChromeWarning_Content",modal:true});});Ext.net.ResourceMgr.init({id:"ctl00$ResourceManager1",BLANK_IMAGE_URL:"/extjs/resources/images/gray/s-gif/ext.axd",aspForm:"Form1"});
答案 0 :(得分：1)
这个有点棘手，但我怀疑当你回到页面'A'时，程序正试图找到DataChanged事件的处理程序。在黑暗中完全拍摄...也许尝试将所述事件添加到DirectEvents元素。
注意： 我在OP的要求下将此作为答案发布。它在评论中是原始的。
答案 1 :(得分：1)
我猜你在后面的代码中添加（某处？）DataChanged直接事件处理程序，并且在下次请求时没有读取该处理程序
如果资源管理器检测到请求是直接事件请求且窗口小部件没有事件的附加处理程序，则会发生该异常
您可以为问题页面发布生成的javascript代码吗？