var InvoiceItemGrid = Ext.create('Ext.grid.Panel', {        forceFit: false,autoHeight: true,autoScroll: true,frame: true,split: false,layout: "fit",height:document.documentElement.clientHeight,margin: 0,store: PrecStore,loadMask: { msg: '数据加载中...' },columnLines: true,//dockedItems: [PTxtInfo],//selType: "checkboxmodel",
        selModel: {mode: "multi",//multi,simple,single；默认为多选multicheckOnly: false,//如果值为true，则只用点击checkbox列才能选中此条记录allowDeselect: true,//如果值true，并且mode值为单选（single）时，可以通过点击checkbox取消对其的选择
        },viewConfig: {stripeRows: true,//在表格中显示斑马线enableTextSelection: true //可以复制单元格文字 "GGXH", "XMSL", "XMDJ", "XMJE", "SL", "SE", "SPBM", "TaxItem"],
        },bbar: { xtype: "pagingtoolbar", inputItemWidth: 100, store: PrecStore, displayInfo: true },columns: [{ text: "Id", width: 80, dataIndex: "Id", hidden: true },          { text: "商品名称", width: 80, dataIndex: "XMMC" },{ text: "单位", width: 80, dataIndex: "DW" },{ text: "规格型号", width: 120, dataIndex: "GGXH" },{ text: "数量", width: 80, dataIndex: "XMSL" },{ text: "项目单价", width: 120, dataIndex: "XMDJ" },{ text: "项目金额", width: 80, dataIndex: "XMJE" },{ text: "税额", width: 80, dataIndex: "SE" },{ text: "税率%", width: 80, dataIndex: "SL" },{ text: "税目编码", width: 160, dataIndex: "SPBM" },]});//主窗体var WindItem= Ext.create('widget.window', {title: '发票明细',closable: true,closeAction: 'hide',modal: true,frame: true,layout: 'fit',width: 895,minWidth: 895,height: 430,layout: {type: 'border',padding: 2},items: [InvoiceItemGrid]});

    var WindItem= Ext.create('widget.window', {title: '发票明细',closable: true,closeAction: 'hide',modal: true,frame: true,layout: 'fit',width: 895,minWidth: 895,height: 430,layout: {type: 'border',padding: 2},items: [{region: 'center',xtype: 'tabpanel',items: InvoiceItemGrid}]});

var DataFrom = Ext.create('Ext.form.Panel', {hidden: true,bodyPadding: 0,width: 890,header: true,layout: 'fit',defaults: {anchor: '100%'},defaultType: 'textfield',items: [InvoiceItemGrid],buttons: [{text: '关闭',handler: function () {WindItem.close();}}]});var WindItem= Ext.create('widget.window', {title: '发票明细',closable: true,closeAction: 'hide',modal: true,frame: true,layout: 'fit',width: 895,minWidth: 895,height: 430,layout: {type: 'border',padding: 2},items: [{region: 'center',xtype: 'tabpanel',items: DataFrom}]});

//定义的数据源
var ProductLine = new Ext.data.Store({fields: ["className", "classID"],autoLoad: true,proxy: {type: "ajax",actionMethods: { read: "POST" },url: '/urlOrderCV/GetAllProductLine',reader: {type: 'json',rootProperty: 'Data',totalProperty: 'TotalCount'}}
});
///定义的下来列表Combobox
{xtype: "combobox",store: ProductLine,displayField: "className",   //显示出来的是name valueField: "classID",       //值是idfieldLabel: "科级名称",     //labeleditable: true,        //不可编辑minChars: 1,id: "classname",           //idlabelWidth: 50,width: 160
}

public ActionResult GetAllProductLine (string query)
{if (string.IsNullOrEmpty(query)){//查询全部}else{//更加query查询部分}
}