AxpDataGrid does not utilize ViewState (with a few exceptions)
AxpDataGrid does not utilize ViewState, except for properties that are directly inherited from a WebControl. Of special interest is the Visible and Enabled properties. The rest of the properties must be set on each page request and not only when the page is displayed initially (i.e. set AxpDataGrid properties also when Page.IsPostback is true!)
AxpDataGrid Class | Axezz.WebControls Namespace