Extjs/get the text displayfield value and the actual valuefield value in ComboBox

When ComboBox is used, it has a hiddenname attribute, This API is used to submit values in the valuefield field in ComboBox. (If the hiddenname attribute is not configured, The displayfield value will be passed) For example: The ID of a ComboBox is idvalue, The value of the hiddenname attribute is hiddenvalue, Use Ext. Get ('idvalue'). Dom. Value to obtain the text displayfield value of the selected item in ComboBox, The valuefield value to be submitted in ComboBox is obtained using Ext. Get ('hiddenvalue'). Dom. value.Formpanel1.form. findfield ('hiddenvalue'). getrawvalue () can also obtain the text value, that is, displayfield.