ExtJS Interview Questions and Answers
Ques 21. How to find no of records in a store?
Using
store.getTotalCount() : Gets the total number of records in the dataset as returned by the server.
Ques 22. How to handle exception while loading datastore?
Using loadexception event.
syntax: store.loadexception() : Fires if an exception occurs in the Proxy during loading.
use beforeload : ( Store this, Object options ) : Fires before a request is made for a new data object. If the beforeload handler returns false the load action will be canceled.
syntax:
store.on('loadexception', function(event, options, response, error) {
alert("Handling the error");
event.stopEvent();
});
Ques 23. How to handle updates for store changes?
Use store.commitChanges()
Ques 24. What is the purpose of each() in store?
Calls the specified function for each of the Records in the cache
each( Function fn, [records Object] )
Ques 25. How to get modified records using store object?
store.getModifiedRecords() : Gets all records modified since the last commit.
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