private void BuildChildren(IEnumerable items, int startingIndex)
{
IList <View> children = Layout?.Children;
if (children == null || items == null)
{
return;
}
IDataTemplateSelector templateSel = ItemTemplateSelector;
if (templateSel == null && ItemTemplate == null)
{
templateSel = new DefaultTemplateSelector(this);
}
if (templateSel != null)
{
foreach (object item in ItemsSource)
{
children.Insert(startingIndex++, CreateItemView(item, templateSel.SelectTemplate(item, this)));
}
}
else
{
DataTemplate template = ItemTemplate;
foreach (object item in ItemsSource)
{
children.Insert(startingIndex++, CreateItemView(item, template));
}
}
}
/// <summary>
/// Return the template to use. This may depend on the Content, or
/// other properties.
/// </summary>
/// <remarks>
/// The base class implements the following rules:
/// (a) If ContentTemplate is set, use it.
/// (b) If ContentTemplateSelector is set, call its
/// SelectTemplate method. If the result is not null, use it.
/// (c) Look for a DataTemplate whose DataType matches the
/// Content among the resources known to the ContentPresenter
/// (including application, theme, and system resources).
/// If one is found, use it.
/// (d) If the type of Content is "common", use a standard template.
/// The common types are String, XmlNode, UIElement.
/// (e) Otherwise, use a default template that essentially converts
/// Content to a string and displays it in a TextBlock.
/// Derived classes can override these rules and implement their own.
/// </remarks>
protected virtual DataTemplate ChooseTemplate()
{
DataTemplate template = null;
object content = Content;
// ContentTemplate has first stab
template = ContentTemplate;
// no ContentTemplate set, try ContentTemplateSelector
if (template == null)
{
if (ContentTemplateSelector != null)
{
template = ContentTemplateSelector.SelectTemplate(content, this);
}
}
// if that failed, try the default TemplateSelector
if (template == null)
{
template = DefaultTemplateSelector.SelectTemplate(content, this);
}
return(template);
}
public static DefaultTemplateSelector Path(string path)
{
var selector = new DefaultTemplateSelector(path);
return selector;
}
public static DefaultTemplateSelector Path(string path)
{
var selector = new DefaultTemplateSelector(path);
return(selector);
}
