从 EventArgs 获取特定的树视图

Question

我在我的代码中动态生成了几个树视图控件，并将所有树视图指向同一个 SelectedNodeChanged 事件。但是，在这种情况下，我无法获取包含被单击节点的特定树视图。

for (int i = 0; i < numTree; i++)
{
    treeList[i] = new TreeView();
    treeList[i].SelectedNodeChanged += TreeSelectedNodeChanged;
}

private void TreeSelectedNodeChanged(object sender, EventArgs e)
{
    // cannot call treeList[i] since all treeview should direct to this event 
    Message.Text = "You selected: " + treeList[i].SelectedNode.Text;
}

如有任何意见，我们将不胜感激！

Answer 1

sender参数是触发事件的控件

private void TreeSelectedNodeChanged(object sender, EventArgs e)
{
    var selected_tree_view = (TreeView)sender;
    // Just in case you need it
    var selected_tree_view_index = treeList.IndexOf(selected_tree_view);
    Message.Text = "You selected: " + selected_tree_view.SelectedNode.Text;
}

从 EventArgs 获取特定的树视图

Get the specific treeview from EventArgs

c#

asp.net

treeview