extjs获取grid的选中数据

1. function getSelectedTableName() {  
2.     var grid = Ext.getCmp('tempTableGridId');  
3.     var rowSelectionModel = grid.getSelectionModel();  
4.     if (rowSelectionModel.hasSelection()) {  
5.         var record = rowSelectionModel.getSelected();  
6.         var tableName = record.get('tableName');  
7.         return tableName;  
8.     } else {  
9.         return '';  
10.     }  
11. }