摘要： usingSystem;usingSystem.Collections;usingSystem.Collections.Generic;usingSystem.ComponentModel;usingSystem.Text;usingSystem.Windows.Forms;namespaceWindowsApplication1{internalclassDBTreeView:TreeView{privateobjectrootValue;privatestringparentMember;privatestringchildMember;privatestringtextMember;pr 阅读全文