A link that executes an action defined by a controller, and then either refreshes the current page, or navigates to a different page based on the PageReference variable that is returned by the action. An component must always be a child of an component. To add request parameters to an , use nested components.

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A link that executes an action defined by a controller, and then either refreshes the current page, or navigates to a different page based on the PageReference variable that is returned by the action. An <apex:commandLink> component must always be a child of an <apex:form> component. To add request parameters to an <apex:commandLink>, use nested <apex:param> components.