CODEWITHSUNDEEP
c#wpf
JamTay317
JamTay317

Reputation: 1017

Get Generic Type in ListView Item

I am building a custom control that will allow me to drag and drop between controls. I am following This that gets me all the way there until I want to allow for multiple types. So I may want to use this in a customers form and drag between two customer ListViews, or an Employee form and drag between two employee forms.

For some reason I cannot cast as Type. Please explain where I am going wrong and why. Thank you!

    private void OnMouseMove(object sender, MouseEventArgs e)
    {
        Point mousePos = e.GetPosition(null);
        Vector diff = _startPoint - mousePos;
        if (e.LeftButton == MouseButtonState.Pressed &&
            Math.Abs(diff.X) > SystemParameters.MinimumHorizontalDragDistance ||
            Math.Abs(diff.Y) > SystemParameters.MinimumVerticalDragDistance)
        {
            if (ListView != null)
            {
                ListViewItem listViewItem =
                    FindAnchestor<ListViewItem>((DependencyObject) e.OriginalSource);
                Type itemType = ListView.ItemContainerGenerator.ItemFromContainer(listViewItem).GetType();
                var item = (itemType)ListView.ItemContainerGenerator.ItemFromContainer(listViewItem);
            }
        }
    }

Upvotes: 1

Views: 352

Answers (1)

Heinzi
Heinzi

Reputation: 172230

Please explain where I am going wrong and why.

You are trying to statically cast to a dynamically determined type.

The bad news: That doesn't work. Static types must be known at compile time.

The good news: There's absolutely no need to do this: For your purposes, storing the reference in a generic object variable suffices:

object item = ListView.ItemContainerGenerator.ItemFromContainer(listViewItem);

Upvotes: 1

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