var caseGrid = new Ext.grid.GridPanel({
                    frame:true,
                    //region:'north',
                    title:'Testcase Grid',
                    width:700,
                    height:300,
                    viewConfig:{
                            forceFit:true
                        },
                    loadMask:true,
                    store:case_list_store,
                    cm: cm,
                    //sm: sm,
                    bbar: new Ext.PagingToolbar({
                        pageSize : 30,
                        store: case_list_store,
                        displayInfo: true,
                        displayMsg: 'display from {0} to {1} testcase, total {2}',
                        emptyMsg: "No testcase"
                    })

            
            });
            case_list_store.load({params:{start:0,limit:30}});

------解决方案--------------------
接楼上，在后台这样写
Java code


public void doPost(reqeust,response){
    String str_start = reqeust.getParameter("start");
    String str_limit = reqeust.getParameter("limit");
    第一次请求  会接收到  str_start = 0;  str_limit=30
    第二次收到str_start = 30;  str_limit=30
    三次str_start = 60;  str_limit=30  以此类推
    

    具体怎么分页你就随便选择了
}

------解决方案--------------------

前台：
  
JScript code
 
 var guestrecord = Ext.data.Record.create(
            [
              {name:'guest_id',type:'string'},
              {name:'guest_name',type:'string'},
              {name:'guest_clerk',type:'string'},
              {name:'guest_clerk_part',type:'string'}
             ]        
            
    );

    var store = new Ext.data.Store({
          
          proxy:new Ext.data.HttpProxy({url:'select.action',method:'post'}),
          
          reader:new Ext.data.JsonReader({totalProperty: 'totalInfos',root:'guests'},guestrecord),
    
          baseParams:{start:0,limit:20}
          
    });