摘要：
TreeView 控件关键属性CheckedNodes 声明被选择的单个或者多个节点ExpandDepth 声明TreeView控件展开的深度Nodes TreeNodeCollection类型的节点集合SelectedNode 当前被选择的节点ShowCheckBoxes 声明是否显示复选框... 阅读全文
摘要：
Global中
protected void Application_Start(Object sender, EventArgs e)
{
Application["Counter"] = "0";
}
protected void Session_Start(Object sender, EventArgs e)
{
Application.lock();
Application["Counter"] = Convert.ToInt32(Application["Counter"])+1;
Application.unlock();
}
protected void Session_End(Object sender, EventArgs e)
{
Application.lock();
Application["Counter"] = Convert.ToInt32(Application["Counter"])-1;
Applicatio 阅读全文