private void btnFilterValue_Click(object sender, RoutedEventArgs e)
{
string name = txtFilterValue.Text;
TreeViewItem newChild = new TreeViewItem();
newChild.Header = name;
if (treeView1.SelectedItem == null)
{
return;
}
var index = treeView1.Items.IndexOf(treeView1.SelectedItem);
if (index == -1)
{
return;
}
var item = (TreeViewItem)treeView1.Items[index];//[0];
if (item.Header is MyTreeViewItem)
{
_filterProvider.AddFilterValue(name, item.Header as MyTreeViewItem);
refreshTreeView();
}
}