过滤Dojo Grid后如何获取所有标识符

Question

我正在使用带有ItemFileWriteStore和过滤器插件的dojo增强型网格。

dojo.require("dojox.grid.EnhancedGrid");
dojo.require("dojo.data.ItemFileWriteStore");
dojo.require("dijit.form.Select");

dojo.require("dojox.grid.enhanced.plugins.Filter");
dojo.require("dojox.grid.enhanced.plugins.exporter.CSVWriter");

dojo.ready(function(){
/*set up data store*/
var data = {
  identifier: 'id',
  items: []
};

var structure = [{
cells:[
{field: "id", datatype: "string", autoComplete: true },
{field: "pecla_ID", datatype: "string", autoComplete: true }

}];


var store = new dojo.data.ItemFileWriteStore({ url: "xGetAllClaims.xsp"});

/*set up layout*/
var layout = [[
    {'name': 'Claim Running No.', 'field': 'pecla_ID', datatype: "string", autoComplete: true, 'width': '138px'},
    {'name': 'Internal No.', 'field': 'pecla_InternalID', 'width': '138px', filterable: false}


]];

/*create a new grid:*/
var grid = new dojox.grid.EnhancedGrid({
    id: 'grid',
    store: store,
    structure: layout,
    rowSelector: '20px',
    plugins: {
     exporter: true,
        filter: {
            // Show the closeFilterbarButton at the filter bar

            // Set the maximum rule count to 5
            ruleCount: 5,
            structure:structure,
            // Set the name of the items
            itemsName: "id"
        }
    }},
  document.createElement('div')
  );

/*append the new grid to the div*/
dojo.byId("gridDiv").appendChild(grid.domNode);

/*Call startup() to render the grid*/
grid.startup();


grid.on("RowDblClick", function(evt){
var idx = evt.rowIndex,
    rowData = grid.getItem(idx);
// The rowData is returned in an object, last is the last name, first is the first name
window.open(rowData.notesurl,"_self")

}, true);

});

现在我的问题：我想将数据导出到Excel 我尝试使用导出插件将XAgent导出为CSV，然后导出到Excel 但是当CSV数据大到大（大约14000行）时，我从服务器（Domino 8.5.3 FP6）收到错误 （无效的发布请求异常）

听到我的代码：

 dijit.byId("grid").exportGrid("csv",{
            writerArgs: {
                    separator: ";"
                    }
            }, function(str){
                    var form = document.createElement('form');
                    dojo.attr(form, 'method', 'POST');
                    document.body.appendChild(form);

                    dojo.io.iframe.send({
                            url: "xExportToExcel.xsp",
                            form: form,
                            method: "POST",
                            content: {exp: str},
                            timeout: 900000

                    });
                    document.body.removeChild(form);

                    }
            ); 

有谁知道如何从过滤的行中获取标识符以减少数据量？