How to get current page from paging toolbar - grid

Question

I have a paging toolbar implemented in my grid using extjs 4.1 I get 20 sets of record of first page. "but" when I click next, it does not show the next page. I figure the problem is here
proxy: {
type: 'ajax',
scope: this,
url: 'Controller/getData',
extraParams: {
PageNumber: this.currentPage, // this doesn't change on clicking next
PageSize: 20
},
reader: {
type: 'json',
root: 'myTable',
totalProperty: 'count'
}
as you can see, the PageNumber I am passing to my controller is static.. If I change that to whatever number I get that page... so how do I get the current page so that I can pass it to my controller..
below is my toolbar
bbar: Ext.create('Ext.PagingToolbar', {
scope: this,
store: myStore,
displayInfo: true,
displayMsg: 'Displaying Records {0} - {1} of {2}',
emptyMsg: "No Records to display"
})
please help... thanks

Answer 1

I'm not sure if I can help you, have you check your backend processing code? I mean, as far as I know, the way you declare store and paging toolbar is right so maybe the problem exist at server side.
for a reference, this is my server side page (remote/data/user/mahasiswa/read.php) to handle store with paging support:
$sql = "SELECT * FROM user";
$rs = mysql_query($sql);
$totalCount = mysql_num_rows($rs);
$sql = $sql." LIMIT ".$start.",".$limit;
$rs = mysql_query($sql);
while($obj = mysql_fetch_object($rs)){
$arr[] = $obj;
}
echo '{success:true, totalCount:'.$totalCount.', data:'.json_encode($arr).'}';
then, this is my store:
Ext.define('PMK.store.user.Mahasiswa', {
extend: 'Ext.data.Store',
model: 'PMK.model.user.Mahasiswa',
pageSize: 30,
proxy: {
type: 'ajax',
url: 'remote/data/user/mahasiswa/read.php',
reader: {
type: 'json',
root: 'data',
successProperty: 'success',
totalProperty: 'totalCount'
}
})
finally this is my view:
Ext.define('PMK.view.user.mahasiswa.List' ,{
extend: 'Ext.panel.Panel',
alias : 'widget.mhslist',
title:'Manage Mahasiswa',
layout:'fit',
initComponent: function() {
this.items = [
{
xtype:'grid',
store:'user.Mahasiswa',
columns: [
{xtype: 'rownumberer', width: 50, sortable: false},
{header: 'Angkatan', dataIndex: 'ANGKATAN', sortable:true, width:60},
{header: 'NIM', dataIndex: 'NIM', sortable:true, width:100},
{header: 'Nama', dataIndex: 'NAMA', sortable:true, width:225},
{header: 'Program Studi', dataIndex: 'PRODI', sortable:true, width:225},
{header: 'Kelas', dataIndex: 'KELAS', sortable:true, width:50},
{header: 'Dosen PA', dataIndex: 'DOSEN_PA', sortable:true, width:125},
{header: 'Jalur', dataIndex: 'JALUR', sortable:true, width:50},
{header: 'Asal Sekolah', dataIndex: 'ASAL_SEKOLAH', sortable:true, width:175},
{header: 'Tempat Lahir', dataIndex: 'TL', sortable:true, width:100},
{header: 'Tanggal Lahir', dataIndex: 'TGL', sortable:true, width:75},
{header: 'JK', dataIndex: 'JK', sortable:true, width:25},
{header: 'Alamat', dataIndex: 'ALAMAT', sortable:true, width:225},
{header: 'Email', dataIndex: 'EMAIL', sortable:true, width:130},
{header: 'Telp', dataIndex: 'TELP', sortable:true, width:100},
{header: 'Agama', dataIndex: 'AGAMA', sortable:true, width:50},
{header: 'Input Date', dataIndex: 'INPUT_DATE', sortable:true, width:125},
{header: 'Input By', dataIndex: 'INPUT_BY', sortable:true, width:125},
{header: 'Edit Date', dataIndex: 'EDIT_DATE', sortable:true, width:125},
{header: 'Edit By', dataIndex: 'EDIT_BY', sortable:true, width:125}
]
}
];
this.bbar = Ext.create('Ext.PagingToolbar', {
store: 'user.Mahasiswa',
displayInfo: true,
displayMsg: 'Displaying mahasiswa {0} - {1} of {2}',
emptyMsg: "No mahasiswa to display"
});
this.callParent(arguments);
}
});