问卷调查系统毕业设计的佳作

usingSystem;usingSystem.Collections.Generic;usingSystem.ComponentModel;usingSystem.Data;usingSystem.Drawing;usingSystem.Text;usingSystem.Windows.Forms;usingWeifenLuo.WinFormsUI.Docking;//引入第三方开源控件Docking类库usingSystem.IO;//引入文件操作类库namespaceLJ_QuestionnaireSystem{//////主界面操作类///Aut