protected virtual DataTemplate GetTemplateFor(object item)
{
var template = ItemTemplate;
if (TemplateSelector != null)
{
template = TemplateSelector.SelectTemplate(item, null);
}
return(template);
}
private void UpdateContent()
{
if (BindingContext == null || TemplateSelector == null)
{
return;
}
var template = TemplateSelector.SelectTemplate(SelectorItem ?? BindingContext, this);
Content = template.CreateContent() as View;
}
public void LoadContent()
{
if (TemplateSelector == null)
{
TemplateSelector = (AsyncLoadStateTemplateSelector)Resources["DefaultAsyncLoadStateTemplateSelector"];
}
var tempContent = (FrameworkElement)TemplateSelector.SelectTemplate(this, this).LoadContent();
// 仅在有错误的情况下，设置DataContext以便于错误页的信息展示
if (ErrorMessage != null && ErrorMessage.Length > 0)
{
tempContent.SetValue(FrameworkElement.DataContextProperty, this);
}
Content = tempContent;
}