public static PersistenceHandler GetInstance(PersistenceMethod method)
{
switch (method)
{
case PersistenceMethod.CookieBased:
return(new CookieHandler());
default:
case PersistenceMethod.SessionBased:
return(new SessionHandler());
}
}
/// <summary>
/// Gets the GridViewSearchPanel State from the cookie
/// </summary>
/// <param name="controlStateName">Name of the control state.</param>
/// <param name="persistenceMethod">The persistent method.</param>
/// <returns></returns>
public static GridViewSearchPanelState GetGridViewSearchPanelState( string controlStateName, PersistenceMethod persistenceMethod )
{
GridViewSearchPanelState controlState = null;
switch ( persistenceMethod )
{
case PersistenceMethod.Session :
#region Uses Session state
if ( HttpContext.Current.Session[ controlStateName ] != null )
{
controlState = HttpContext.Current.Session[ controlStateName ] as GridViewSearchPanelState;
}
#endregion
break;
case PersistenceMethod.Cookie :
case PersistenceMethod.PersistentCookie :
#region Uses a client session cookie
HttpCookie cookie = HttpContext.Current.Request.Cookies[ controlStateName ];
if ( cookie != null )
{
controlState = DeserializeGridViewSearchPanelState( HttpContext.Current.Server.UrlDecode( cookie.Value ) );
}
#endregion
break;
}
return controlState;
}
/// <summary>
/// Saves the GridViewSearchPanel State.
/// </summary>
/// <param name="controlState">State of the control.</param>
/// <param name="controlStateName">Name of the control state.</param>
/// <param name="persistenceMethod">The persistent method.</param>
/// <param name="persistentCookieExpiryDateTime">The persistent cookie expiry datetime.</param>
public static void SaveGridViewSearchPanelState( GridViewSearchPanelState controlState, string controlStateName,
PersistenceMethod persistenceMethod, DateTime? persistentCookieExpiryDateTime )
{
switch ( persistenceMethod )
{
case PersistenceMethod.Session :
#region Uses Session state
HttpContext.Current.Session[ controlStateName ] = controlState;
#endregion
break;
case PersistenceMethod.Cookie :
case PersistenceMethod.PersistentCookie :
#region Uses a client cookie
string serializedString = SerializeGridViewSearchPanelState( controlState );
HttpCookie cookie = new HttpCookie( controlStateName, HttpContext.Current.Server.UrlEncode( serializedString ) );
// Determine if this should be persisted longer than just the current session
if ( persistentCookieExpiryDateTime != null )
{
cookie.Expires = persistentCookieExpiryDateTime.Value;
}
HttpContext.Current.Response.Cookies.Add( cookie );
#endregion
break;
}
}
/// <summary>
/// Handles the state of the GridViewSearchPanel
/// </summary>
/// <param name="searchPanel">The search panel.</param>
/// <param name="gridView">The grid view.</param>
/// <param name="persistenceMethod">The persistence method</param>
/// <param name="persistentCookieExpiryDateTime">The date and time the persistent cookie expires</param>
public static void HandleGridViewSearchPanelState( GridViewSearchPanel searchPanel, GridView gridView,
PersistenceMethod persistenceMethod, DateTime? persistentCookieExpiryDateTime )
{
if ( gridView == null )
{
// try and find the GridView control if it hasn't been explicitly supplied
gridView = FindControl( searchPanel.NamingContainer, searchPanel.GridViewControlID ) as GridView;
}
if ( gridView != null )
{
// restore any previously saved state
gridView.Page.Load += new EventHandler(
delegate( object sender, EventArgs e )
{
if ( !gridView.Page.IsPostBack )
{
GridViewSearchPanelState controlState = GetGridViewSearchPanelState( GetUniqueGridViewName( gridView ), persistenceMethod );
if ( controlState != null )
{
controlState.RestoreState( ref gridView, ref searchPanel );
}
}
}
);
// save state on row command, and rebind searchPanel
gridView.RowCommand += new GridViewCommandEventHandler(
delegate(object sender, GridViewCommandEventArgs e)
{
GridViewSearchPanelState controlState = new GridViewSearchPanelState(gridView, searchPanel);
SaveGridViewSearchPanelState(controlState, GetUniqueGridViewName(gridView),
persistenceMethod, persistentCookieExpiryDateTime);
searchPanel.DataBind();
}
);
// save state when page index changes
gridView.PageIndexChanged += new EventHandler(
delegate( object sender, EventArgs e )
{
GridViewSearchPanelState controlState = new GridViewSearchPanelState( gridView, searchPanel );
SaveGridViewSearchPanelState( controlState, GetUniqueGridViewName( gridView ),
persistenceMethod, persistentCookieExpiryDateTime );
}
);
// save state when grid is sorted
gridView.Sorted += new EventHandler(
delegate( object sender, EventArgs e )
{
GridViewSearchPanelState controlState = new GridViewSearchPanelState( gridView, searchPanel );
SaveGridViewSearchPanelState( controlState, GetUniqueGridViewName( gridView ),
persistenceMethod, persistentCookieExpiryDateTime );
}
);
if (gridView is EntityGridView)
{
// save state when grid's page size changed
((EntityGridView)gridView).PageSizeChanged += new EventHandler(
delegate(object sender, EventArgs e)
{
GridViewSearchPanelState controlState = new GridViewSearchPanelState(gridView, searchPanel);
SaveGridViewSearchPanelState(controlState, GetUniqueGridViewName(gridView),
persistenceMethod, persistentCookieExpiryDateTime);
}
);
}
// save state when search id done
searchPanel.SearchButtonClicked += new EventHandler(
delegate( object sender, EventArgs e )
{
GridViewSearchPanelState controlState = new GridViewSearchPanelState( gridView, searchPanel );
SaveGridViewSearchPanelState( controlState, GetUniqueGridViewName( gridView ),
persistenceMethod, persistentCookieExpiryDateTime );
}
);
// save state when reset is done
searchPanel.ResetButtonClicked += new EventHandler(
delegate( object sender, EventArgs e )
{
GridViewSearchPanelState controlState = new GridViewSearchPanelState( gridView, searchPanel );
SaveGridViewSearchPanelState(controlState, GetUniqueGridViewName(gridView),
persistenceMethod, persistentCookieExpiryDateTime);
}
);
}
}
/// <summary>
/// Handles the state of the GridViewSearchPanel
/// </summary>
/// <param name="searchPanel">The search panel.</param>
/// <param name="persistenceMethod">The persistence method.</param>
public static void HandleGridViewSearchPanelState( GridViewSearchPanel searchPanel, PersistenceMethod persistenceMethod )
{
HandleGridViewSearchPanelState( searchPanel, null, persistenceMethod, null );
}
public bool Save(bool forceSaveAs)
{
if (this.book == null)
{
return false;
}
var saveMethod = this.currentSaveMethod;
while (true)
{
if (forceSaveAs || saveMethod == null)
{
var plugins = this.GetPersistenceStrategies();
using (var selector = new PersistencePluginSelector(plugins))
{
var result = selector.ShowDialog();
if (result == DialogResult.Cancel)
{
return false;
}
var factory = selector.StrategyFactory;
saveMethod = new PersistenceMethod(factory.CreateInstance(), null);
}
saveMethod.Uri = saveMethod.Strategy.SaveAs(saveMethod.Uri);
if (saveMethod.Uri == null)
{
return false;
}
}
forceSaveAs = true;
try
{
saveMethod.Strategy.SetDestination(saveMethod.Uri);
saveMethod.Strategy.Save(this.book);
this.currentSaveMethod = saveMethod;
return true;
}
catch (Exception ex)
{
var result = MessageBox.Show(ex.ToString(), "Error Saving", MessageBoxButtons.RetryCancel);
if (result == DialogResult.Cancel)
{
return false;
}
}
}
}
public bool Close()
{
if (this.book != null) // TODO: If the book has unsaved changes.
{
var result = MessageBox.Show("Save changes to your current book?", "Unsaved Changes", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question);
if (result == DialogResult.Cancel)
{
return false;
}
else if (result == DialogResult.Yes)
{
var success = this.Save(forceSaveAs: false);
if (!success)
{
return false;
}
}
}
this.currentSaveMethod = null;
this.SetBook(null);
return true;
}
public void VerifyRandomEnumValue()
{
//Arrange
var theEnum = new PersistenceMethod();
//Act
var result = Randomator.RandomEnumValue(theEnum);
//Assert
Assert.IsTrue(result.GetType() == theEnum.GetType());
}
