EXTJS GRID 中 单击行和单元格获得行或者单元格的内容(数据)
grid.addListener('cellclick',cellclick);
function cellclick(grid, rowIndex, columnIndex, e) {
var record = grid.getStore().getAt(rowIndex); //Get the Record
var fieldName = grid.getColumnModel().getDataIndex(columnIndex); //Get field name
var data = record.get(fieldName);
Ext.MessageBox.alert('show','当前选中的数据是'+data);
}