Ext 表格得到所有行，並得到相應的列值

//取出被所有列值<br />function getGridValue(gridname){<br /> var grid = Ext.getCmp(gridname);</p><p> var grid_data = grid.getStore();<br /> //var data_ids = "";<br /> var data_values = "";<br /> for(var i= 0 ;i< grid_data.data.length;i++){<br />var row = grid_data.getAt(i);<br />var id = row.get("class_unid");<br />var year = row.get("score");<br />if(year == "") year = "null";<br />data_values += ";"+id+","+year;<br />}<br /> data_values = data_values.substring(1);</p><p>return data_values;<br /> }