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c#wpflistviewwrappanelitemspanel

ListView with horizontal layout and wrap from code behind

I am force to use a ListView/listbox from code behind. In that I have to put borders. I wish they wrapped on a new line when needed

ListView lsv = new ListView
{
    Width = 400,
    Height = 200,
    Background = Brushes.LimeGreen,
};
grdMain.Children.Add(lsv);

for (int iii = 0; iii < 15; iii++)
{
    Border b = new Border() { BorderThickness = new Thickness(3),
    BorderBrush = new SolidColorBrush(Colors.Blue), Width = 50, Height = 50     
};
lsv.Items.Add(b);
lsv.ItemsPanel = (ItemsPanelTemplate)XamlReader.Parse("<ItemsPanelTemplate xmlns=\"http://schemas.microsoft.com/winfx/2006/xaml/presentation\"><WrapPanel Orientation=\"Horizontal\" HorizontalAlignment=\"Stretch\"/></ItemsPanelTemplate>");

Now with that the effect is the following: enter image description here

instead if I put a fixed width Width=\"300\"

lsv.ItemsPanel = (ItemsPanelTemplate)XamlReader.Parse("<ItemsPanelTemplate xmlns=\"http://schemas.microsoft.com/winfx/2006/xaml/presentation\"><WrapPanel Orientation=\"Horizontal\" Width=\"300\"/></ItemsPanelTemplate>");

it works properly

enter image description here

the problem is that I can't put a fixed width for the wrap panel and I want it to extend to fill its parent.

Thank you in advance Patrick

Solution

  • You can try doing the following...

    ListView listView = new ListView();
var scrollViewer = Utils.GetDescendantByType(listView, typeof(ScrollViewer)) as ScrollViewer;
scrollViewer.HorizontalScrollBarVisibility = ScrollBarVisibility.Disabled;

    Where you will have a helper method

    public static class Utils
{
    public static Visual GetDescendantByType(Visual element, Type type)
    {
        if (element == null)
            return null;

        if (element.GetType() == type)
            return element;

        Visual foundElement = null;
        if (element is FrameworkElement)
            (element as FrameworkElement).ApplyTemplate();

        for (int i = 0; i < VisualTreeHelper.GetChildrenCount(element); i++)
        {
            Visual visual = VisualTreeHelper.GetChild(element, i) as Visual;
            foundElement = GetDescendantByType(visual, type);
            if (foundElement != null)
                break;
        }
        return foundElement;
    }
}

    Note, I have note compiled this code as am on a phone.