ViewState vs Session State in ASP.NET

In ASP.NET, ViewState and Session State are both used to persist data across postbacks, but they have some key differences:

ViewState:

• ViewState stores data on a per-page basis.
• ViewState retains data on the client side, typically in hidden fields within the rendered HTML.
• ViewState is lightweight and ideal for storing small amounts of data specific to a single page.
• ViewState data is accessible only on the same page.

Session State:

• Session State stores data that is global to the user session.
• Session State stores data on the server or in an external storage mechanism.
• Session State is suitable for storing larger volumes of data that need to be available across multiple pages.
• Session State data is accessible throughout the user session for all pages in the application.

In summary, ViewState is ideal for storing small amounts of data specific to a single page, while Session State is better suited for storing larger volumes of data that need to be accessed across multiple pages within a user session in ASP.NET.