首先，让我向您介绍我在屏幕中遇到的异常。
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”并切换到页面“B”然后按退格键（所以我转到最后一页）时，我得到了那个错误。但是如果我转到页面“B”并改回“A”，我不会收到错误。
我注意到发生错误时，我添加的列不存在，并且由于绑定到 ext.Store 是在页面未回发时发生的，因此我无法查看已通过的值。
现在，这是包含 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>
以及它是如何绑定的
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"});