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我有一个TreeView和签署了“TreeViewConnections_AfterExpand”和“”事件。每个人TreeNode都包含MenuScript事件。和下面的代码:的TreeView AfterExpand事件somtimes不起作用C#
//event
private void TreeViewConnections_AfterExpand(object sender, TreeViewEventArgs e)
{
var activeKey = e.Node.ImageKey.Replace("Inactive", "Active");
e.Node.ImageKey = activeKey;
e.Node.SelectedImageKey = activeKey;
}
//event
private void TreeViewConnections_MouseClick(object sender, MouseEventArgs e)
{
var currentNode = this.treeViewConnections.GetNodeAt(e.Location);
if (currentNode == null) return;
var currentBounds = currentNode.Bounds;
Rectangle bounds = new Rectangle(currentBounds.Left - ExpandIcon.Width, currentBounds.Y, currentBounds.Width - 5, currentBounds.Height);
if (bounds.Contains(e.Location)) return;
this.treeViewConnections.SelectedNode = currentNode;
if (e.Button == MouseButtons.Right)
{
SetupConnectionMenus(currentNode);
}
}
private void SetupConnectionMenus(TreeNode node)
{
var isOpened = node.Nodes.Count > 0;
if (node.ContextMenu == null)
{
var menu = new ContextMenuStrip();
menu.Items.AddEx("Open Connection", node.Name + "_Open", !isOpened, onClick: OpenConnection_Click, context: node);
menu.Items.AddEx("Close Connection", node.Name + "_Close", isOpened, onClick: CloseConnection_Click, context: node);
node.ContextMenuStrip = menu;
}
}
//event
private void OpenConnection_Click(object sender, EventArgs e)
{
var menuItem = sender as ToolStripMenuItem;
var currentNode = menuItem.Tag as TreeNode;
OpenConnection(currentNode);
}
//event
private void CloseConnection_Click(object sender, EventArgs e)
{
var menuItem = sender as ToolStripMenuItem;
var currentNode = menuItem.Tag as TreeNode;
currentNode.Nodes.Clear();
currentNode.Collapse();
}
private void OpenConnection(TreeNode node)
{
treeViewConnections.BeginUpdate();
//add child node to the node.
treeViewConnections.EndUpdate();
node.Expand(); //?????
}
TreeViewConnections_AfterExpand事件有时不工作。如图所示:
但是在这种情况下,有没有别的东西,我需要做什么?
Node.Expand()是否每次你期望被调用? – Reniuz
是的。每次调用它,我希望它扩展子节点,并在同一时间更改“TreeViewConnections_AfterExpand”事件的节点图标 –
昌节点图标。 –