Extjs怎么删除Grid的记录

1:  tbar : [new Ext.Button ({allowDepress : false,

2:          handler : function() {NewHall();},

3:          iconCls : 'add',

4:          text : '新增'

5:      })

6:  ,

7:  new Ext.Button ({allowDepress : false,

8:          handler : function() {

9:          Ext.MessageBox.confirm('提示', '确实要删除所选的记录吗?',function (btn){

10:          if(btn=='yes'){

11:          var row=extWindowDepartmentList.getSelections();

12:          var jsonData="";

13:          for(var i=0,len=row.length;i<len;i++){

14:          var ss = row[i].get("Id"); //这里为Grid数据源的Id列

15:          if(i==0)

16:          jsonData = jsonData + ss;

17:          else

18:          jsonData = jsonData + ","+ ss;             }

19:          var conn = new Ext.data.Connection();

20:          conn.request(

21:          {          url: "/Department/Del",        //提交的删除地址

22:          params:{strProjects:jsonData},

23:          method: 'post',

24:          scope: this,

25:          callback:function(options,success, response){

26:          if(success){

27:          Ext.MessageBox.alert("提示","所选记录成功删除！");

28:          extWindowDepartmentList.store.reload({params:{start:0, limit:25}}); //重新load数据

29:          }

30:          else

31:          {Ext.MessageBox.alert("提示","所选记录删除失败！");}

32:          }

33:          })

34:          }

35:          })

36:          ;},

37:          iconCls : 'del',

38:          text : '删除'

39:      })

40:  ]