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'
    });