TreeView双击节点而不改变节点的折叠/展开状态,Microsoft在TreeView控件中自作主张地做成双击节点时自动展开/折叠节点。然而如果用户自定义NodeMouseDoubleClick事件，同时又不希望改变结点的展开/折叠状态，就无法直接达到这一效果。可以通过曲线救国的方式达到了目的。-TreeView Double-click the node without changing the node collapse/expand state, Microsoft in the TreeView control when given a free hand to make automatic double-click the node expand/collapse nodes. However, if the user-defined NodeMouseDoubleClick event, and do not want to change the node expanded/collapsed state, it can not directly achieve this effect. Can be achieved by way of Quxianjiuguo purposes.