How to get the group header for a grid panel in extjs?

[vibhakhushi]

here is my code:

var expGroupStore = new Ext.data.GroupingStore({
            id: 'profile_data'+ labId + userName,
//            proxy: new Ext.data.HttpProxy({
//                url: 'localhost/php/student_exp.php?lab='+labId+'&userName='+userName,      // File to connect to
//                method: 'POST'
//            }),
//            baseParams:{task: "LISTING"}, // this parameter asks for listing
            reader: new Ext.data.JsonReader({   // we tell the datastore where to get his data from
                root: 'rows',
                //totalProperty: 'total',
                id: 'Exps'
            }, gridItemMapping),
               autoLoad: true,
               sortInfo:{field: 'exp_id'},
               groupField:'exp_group_id'
            });
 
var expPanel = new Ext.grid.GridPanel({
                border:false,
            ds: expGroupStore,           
             cm: new Ext.grid.ColumnModel(
                 gridColumnMapping),
              sm: rowSelection,
              view: new Ext.grid.GroupingView({
                forceFit:true,                
                showGroupName:true,
                groupTextTpl: '{[ values.rs[0].data["exp_name"] ]}' 
                  }),
              tbar: tBarMenu
                });

when i run the code i'm getting the groups. But for each group i have exp_name but its not getting displayed :(
Please help me out... I'm in the learning extjs 2.3 now.

[gits]

does an error occur or what is displayed instead? ... and why do you use 2.3 and not a newer version ... the newer ExtJs versions are really improved regarding performance and stability ...

kind regards

[vibhakhushi]

Hello gits, Now i'm upgrading to newer version. Can you please help me out with tutorials and other materials to upgrade to newer version of ExtJS?

[gits]

you should just browse the extjs-forums when issues occur during the upgrade ... basically an upgrade from 2.2.1 to 3 > was seamless for us ... but it might depend on code that you have ...