What is view state error in VF page?
If the size of a particular page exceeds 135kb, the page will throw a view state error. A screenshot showing a view state error in salesforce. To check the view state of a visual force page you have to make sure that Show View State in Development Mode checkbox in the User Layout is checked.
How do I show errors in VF page?
apex error message Sometime we need to show error message on Visualforce page. We can implement this requirement by creating new instance of ApexPages. message and then adding message to Apexpages using ApexPages. addmessage.
What is view state limit in Salesforce?
170KB
Salesforce allows Visualforce pages to have a maximum view state size of 170KB. The View State tab shows you which elements on your page are taking up that space. A smaller view state size generally means quicker load times.
How do I reduce View State error?
In order to reduce the view state, make use of the following:
- “Transient” keyword – to declare instance variables that can’t be saved, and shouldn’t be transmitted as part of the view state for a VF page.
- Minimize the number of forms i.e on a page.
- Refine your SOQL to retrieve only the data needed.
Where does view state come from in Visualforce?
If you notice that a large percentage of your view state comes from objects used in controllers or controller extensions, consider refining your SOQL calls to return only data that’s relevant to the Visualforce page. View state holds the state of Visual force page.
What does view state error in Salesforce mean?
View State: As the name suggests, it is an error of View State. Maximum view state size limit (135KB) exceeded is the error message pertaining to View State error and here follows a brief detailing of the issue. View state holds the state/size of the visual force page that includes the components, field values, and controller state.
Why is variable b not visible in view state?
Variable “b” is private, that means it is not accessible in Visualforce page however it will be available in View State. variable “d” is not initialized in constructor and hence it is not visible in view state. The Opportunity object have only those fields which was initialized in code.
How is the view State posted back to the server?
The view state is posted back along with the other form data, which gives the server enough information to recreate the page state to which new changes can be applied. The data in the view state should be sufficient to recreate the state of the page when the postback is received.