Question

我提出以下问题:

In my TreeView i added unselect functionality by calling my own deselect()-method when the user clicks the TreeView but not a TreeViewItem. Here is my TreeView method:

public void deselectAll()
{
    TreeViewItem item = SelectedItem as TreeViewItem;
    if (item != null)
    {
        this.Focus();
        item.IsSelected = false;
    }
}

My problem is, that i can t reselect a TreeViewItem after i unselected it. I ve read, that focusing the TreeView itself should solve this problem, but it s not. It also doesn t matter if i put the Focus() before or after the IsSelected = false .

是否有人想为什么不这样做? 任何想法都会受到赞赏。

Answer 1

页: 1 IsS selected =不实;你必须请Focus()回答你的树情。

        <TreeView MouseLeftButtonDown="TreeView_MouseLeftButtonDown">
            <TreeViewItem Header="Employee1">
                <TreeViewItem Header="Jesper"/>
                <TreeViewItem Header="Aaberg"/>
                <TreeViewItem Header="12345"/>
            </TreeViewItem>
            <TreeViewItem Header="Employee2">
                <TreeViewItem Header="Dominik"/>
                <TreeViewItem Header="Paiha"/>
                <TreeViewItem Header="98765"/>
            </TreeViewItem>
        </TreeView>

    private void TreeView_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
    {
        var tv = sender as TreeView;

        if (tv != null)
        {
            var item = (TreeViewItem)tv.SelectedItem;
            item.IsSelected = false;
            tv.Focus();
        }
    }

你写的焦点是解决你的问题。你称之为你的当选人吗?

as a workaround you can use the MouseLeftDown to set an item as selected.

页: 1

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