extjs4 paging grid reloading store on paging event - extjs4

Question

i have a paging grid and some function that load a new store to the grid, but when i click on the next page it reverts back to the initial store
the grid:
Ext.define('Pedido', {
extend: 'Ext.data.Model',
fields: [{
name: 'ID',
type: 'int'
}, {
name: 'Nome',
type: 'string'
}, {
name: 'CPF/CNPJ',
type: 'string'
}, {
name: 'Data',
type: 'datetime'
}, {
name: 'TipoPagamento',
type: 'string'
}, {
name: 'StatusPagamento',
type: 'string'
}, {
name: 'TipoPagamento',
type: 'string'
}, {
name: 'Total',
type: 'string'
}],
idProperty: 'ID'
});
var store = Ext.create('Ext.data.Store', {
pageSize: 10,
model: 'Pedido',
remoteSort: true,
proxy: {
type: 'ajax',
url: 'http://localhost:4904/Pedido/ObterPedidosPorInquilino',
reader: {
root: 'Items',
totalProperty: 'TotalItemCount'
}
}
});
var grid = Ext.create('Ext.grid.Panel', {
id: 'grid',
width: 500,
height: 250,
title: 'Array Grid',
store: store,
loadMask: true,
viewConfig: {
id: 'gv',
trackOver: false,
stripeRows: false
},
columns: [{
id: 'gridid',
text: "ID",
dataIndex: 'ID',
width: 50
}],
bbar: Ext.create('Ext.PagingToolbar', {
store: store,
displayInfo: true,
displayMsg: 'Exibindo {0} - {1} de {2}',
emptyMsg: "Nenhum pedido"
}),
renderTo: 'pedidos'
});
store.load({
params: {
start: 0,
limit: 10
}
});
and the function that set the new store
store.load({
params: {
param: newparam
}
});
also, when I call this function, I would like to set the label on the viewing page x of y back to 1, since setting a new store takes you back to the first page
thanks again

Answer 1

I am not sure why you are replacing the store when you page through your data..but notice the paging toolbar is bound to the store as well as the grid itself. If you are going to change the underlying store here you will need to rebind columns, and the paging bar. Try the reconfigure method http://docs.sencha.com/ext-js/4-0/#!/api/Ext.panel.Table-method-reconfigure
Again I think you need to reevaluate your use case and perhaps think of a different way of accomplishing what you are doing.