Can we use Standard Controller & controller attributes at a time in Salesforce?

Hi,

No, We cannot reference both attributes at a time.

See below syntax to understand

<apex:page standardController=”ControllerName” extensions=”Class1, Class2,..”> Correct

<apex:page Controller=”MYControllerName” extensions=”Class1, Class2,..”>   Correct syntax

<apex:page standardController=”MYControllerName” Controller=”MyController”>  Wrong

No a custom and standard controller cannot be referenced on the same page. A custom and standard controller should not be supported at the same time; another way is you can use extensions instead of Custom Controller.

Ex- <apex:page standardcontroller=""  extensions="controller name"/>