/// -----------------------------------------------------------------------------------------------------------------------------------------------------------------
/// <summary>
/// Load the view state from persistent medium.
/// </summary>
/// <remarks>
/// <author>jhill</author>
/// <creation>Wednesday, 30 May 2007</creation>
/// </remarks>
/// -----------------------------------------------------------------------------------------------------------------------------------------------------------------
public override void Load()
{
// Load view state from DB
string pageViewState = PageViewStateServices.GetByID(GetViewStateID());
if (pageViewState == null)
{
ViewState = null;
ControlState = null;
}
else
{
// Deserialize into a Pair of ViewState and ControlState objects
IStateFormatter formatter = StateFormatter;
Pair statePair = (Pair)formatter.Deserialize(pageViewState);
// Update ViewState and ControlState
ViewState = statePair.First;
ControlState = statePair.Second;
}
}
/// -----------------------------------------------------------------------------------------------------------------------------------------------------------------
/// <summary>
/// Save the view state to persistent medium.
/// </summary>
/// <remarks>
/// <author>jhill</author>
/// <creation>Wednesday, 30 May 2007</creation>
/// </remarks>
/// <param name="viewState">View state to save.</param>
/// -----------------------------------------------------------------------------------------------------------------------------------------------------------------
public override void Save()
{
// Create a pair for ViewState and ControlState
Pair statePair = new Pair(ViewState, ControlState);
IStateFormatter formatter = StateFormatter;
// Save the view state
Guid id = GetViewStateID();
PageViewStateServices.Save(id, formatter.Serialize(statePair));
// Store the ID of the view state in a hidden form field
HtmlInputHidden control = _page.FindControl("__VIEWSTATEID") as HtmlInputHidden;
if (control == null)
{
ScriptManager.RegisterHiddenField(_page, "__VIEWSTATEID", id.ToString());
}
else
{
control.Value = id.ToString();
}
}
