public override Fragment GetItem(int position)
{
var info = FragmentInfos.ElementAt(position);
info.Fragment.DataContext = info.ViewModel;
return(info.Fragment);
}
private void Resolve(XElement xElement, ViewComponentBase parentComponent)
{
var name = xElement.Name;
if (string.Equals(name.LocalName, "placeholder", StringComparison.OrdinalIgnoreCase))
{
var placeHolderId = xElement.Attribute("id").Value;
var fragmentInfo = FragmentInfos.FirstOrDefault(
item => string.Equals(item.PlaceHolderId, placeHolderId, StringComparison.OrdinalIgnoreCase));
if (fragmentInfo == null)
{
throw new Exception("缺少placeHolderId为" + placeHolderId + "的知识片段数据");
}
ViewComponent component = new ViewComponent(fragmentInfo);
component.OrginalEditConfig = xElement.ToString();
component.BeforeLoadDataEventHandler += Component_BeforeLoadDataEventHandler;
component.LoadDataEventHandler += Component_LoadDataEventHandler;
component.AfterLoadDataEventHandler += Component_AfterLoadDataEventHandler;
AssignmentXmlAttributeToComponent(xElement, component);
parentComponent.AddChild(component);
if (ViewComponents == null)
{
ViewComponents = new Dictionary <string, ViewComponent>(StringComparer.OrdinalIgnoreCase);
}
component.Id = "v" + (ViewComponents.Count + 1).ToString();
if (ViewComponents.ContainsKey(component.Id))
{
throw new Exception("存在同名的组件");
}
ViewComponents.Add(component.Id, component);
}
else
{
var parentCom = new ViewComponentContainer();
AssignmentXmlAttributeToComponent(xElement, parentCom);
parentCom.OrginalEditConfig = xElement.ToString();
parentComponent.AddChild(parentCom);
//如果子孙节点存在placeholder，继续
if (xElement.Descendants("placeholder").Any())
{
foreach (var childElement in xElement.Elements())
{
Resolve(childElement, parentCom);
}
}
}
}