Assume we have a parameter object
var parameters = {name: 'POS', min_price: 10, start_date: '2016-01-01'};
To convert it to URL query, we can use following code
Ext.urlEncode(parameters);
it will output
name=POS&min_price=10&start_date=2016-01-01
And to concatenate two URL part, we can use following code
Ext.urlAppend('http://test.com/products/export', Ext.urlEncode(params));
It will build URL like following
http://test.com/products/export?name=POS&min_price=10&start_date=2016-01-01
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