取得选中Grid的数据

 var MergeAction = new Ext.Action({
         text: '合并(选中两行)',
         handler: function () {
             if (grid.getSelectionModel().hasSelection()) {
                 var records = grid.getSelectionModel().getSelections();//获取选中的项
                 var count = records.length;//选中项的条数
                 if (count != 2) {
                     Ext.Msg.alert('温馨提示', '请检查选择的行数，当前选择了<font color="red">' + count + '行</font>，只能选择2行!');
                     return;
                 } else {
                     var numbers = new Array();
                     for (var i = 0; i < records.length; i++) {
                         numbers[i] = records[i].data.AccidentNumber;//取得其中的数据
                     }
                     Ext.Msg.confirm('温馨提示', '是否确认合并选中项?', function (btn) {
                         if (btn == 'yes') {
                             var numberA = numbers[0];
                             var numberB = numbers[1];
                             Ext.Ajax.request({
                                 url: './AccidentArea/MergeAccident/MergeSameAccident',
                                 params: { caseNoA: numberA, caseNoB: numberB },
                                 success: function (reponse) {
                                     var result = Ext.decode(reponse.responseText);
                                     Ext.Msg.alert('温馨提示', result.Message);
                                     if (result.success) {
                                         store.reload();
                                     }
                                 },
                                 failure: function (response, options) {
                                     var result = Ext.decode(response.responseText);
                                     Ext.Msg.alert('温馨提示', result.error);
                                 }
                             });
                         }
                     });
                 }
             } else {
                 Ext.Msg.alert('温馨提示', '请选择需要合并的项!');
                 return;
             }
         },
         iconCls: 'x-arrow_merge'
     });