Get and play through controls from TabItem?
How do I get all the controls / UIElements that are nested in a Tabitem (from a TabControl)?
I've tried everything but couldn't get them.
(Set the SelectedTab value):
private TabItem SelectedTab = null;
private void tabControl1_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
SelectedTab = (TabItem)tabControl1.SelectedItem;
}
Now I need something like this:
private StackPanel theStackPanelInWhichLabelsShouldBeLoaded = null;
foreach (Control control in tabControl.Children /*doesnt exist*/, or tabControl.Items /*only TabItems*/, or /*SelectedTab.Items ??*/ ) //I Have no plan
{
if(control is StackPanel)
{
theStackPanelInWhichLabelsShouldBeLoaded = control;
//Load Labels in the Stackpanel, thats works without problems
}
}
After Silvermind: By doing this, the graph is always 1:
UpdateLayout();
int nChildCount = VisualTreeHelper.GetChildrenCount(SelectedTab);
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3 answers
TabControl has an Items property (derived from ItemsControl) which returns all TabItems - http://msdn.microsoft.com/en-us/library/system.windows.controls.itemscontrol.items.aspx . Or, you can navigate the visual tree:
var firstStackPanelInTabControl = FindVisualChildren<StackPanel>(tabControl).First();
Using:
public static IEnumerable<T> FindVisualChildren<T>(DependencyObject rootObject) where T : DependencyObject
{
if (rootObject != null)
{
for (int i = 0; i < VisualTreeHelper.GetChildrenCount(rootObject); i++)
{
DependencyObject child = VisualTreeHelper.GetChild(rootObject, i);
if (child != null && child is T)
yield return (T)child;
foreach (T childOfChild in FindVisualChildren<T>(child))
yield return childOfChild;
}
}
}
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Maybe a method like this will help you:
public static IEnumerable<T> FindChildren<T>(this DependencyObject source)
where T : DependencyObject
{
if (source != null)
{
var childs = GetChildObjects(source);
foreach (DependencyObject child in childs)
{
//analyze if children match the requested type
if (child != null && child is T)
{
yield return (T) child;
}
//recurse tree
foreach (T descendant in FindChildren<T>(child))
{
yield return descendant;
}
}
}
}
See the full article (Finding Items in the WPF Tree) here .
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for me VisualTreeHelper.GetChildrenCount always returns 0 for tab control, I had to use this method instead
public static List<T> ObtenerControles<T>(DependencyObject parent)
where T : DependencyObject
{
List<T> result = new List<T>();
if (parent != null)
{
foreach (var child in LogicalTreeHelper.GetChildren(parent))
{
var childType = child as T;
if (childType != null)
{
result.Add((T)child);
}
foreach (var other in ObtenerControles<T>(child as DependencyObject))
{
result.Add(other);
}
}
}
return result;
}
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