About this question
I have a single VisualForce Page and multiple Components, and each component have different controllers for individual operations. But in one of the VisualForce Components I want to upload a document to the S3 bucket;
So to achieve this functionality without the view state limit error I have started with a scratch and created a VF page with StandardController "Document" and extension with custom controller and it worked well for me.
But the same thing I want to use inside a Visualforce Component, but I am not able to use StandardController salesforce. What is the standard controller in Salesforce?
