public WebPage Rollback(int pageID, int version)
{
var page = Find(pageID);
if (!page.EnableVersioning)
{
throw new Exception("The web page is not enable version controll.Roll back fail.");
}
if (page.Version == version)
{
throw new Exception("Can not roll back to current version");
}
var pageVer = context.Set <WebPageVersion>().FirstOrDefault(v => v.PageID == pageID && v.Version == version);
if (pageVer == null)
{
throw new Exception("The web page version not found.");
}
Context.Database.ExecuteSqlCommand("DELETE FROM dna_Widgets WHERE PageID={0}");
Context.Database.ExecuteSqlCommand("DELETE FROM dna_WebPageVersions WHERE PageID={0} AND Version<{1}", pageID, version);
PageElement pageData = null;
if (!string.IsNullOrEmpty(pageVer.Content))
{
pageData = (PageElement)XmlSerializerUtility.DeserializeFromXmlText <PageElement>(pageVer.Content);
page.Populate(pageData);
var widgetDatas = pageData.Widgets;
foreach (var w in widgetDatas)
{
var descroptor = Context.WidgetDescriptors.FirstOrDefault(d => d.InstalledPath.Equals(w.WidgetID, StringComparison.OrdinalIgnoreCase));
if (descroptor != null)
{
var widget = new WidgetInstance();
widget.Popuple(w);
widget.PageID = page.ID;
widget.WebPage = page;
widget.DescriptorID = descroptor.ID;
widget.WidgetDescriptor = descroptor;
Context.Widgets.Add(widget);
}
}
}
page.LastModified = DateTime.Now;
page.Version = pageVer.Version;
Context.SaveChanges();
return(page);
}