private void buttonAdd_Click(object sender, EventArgs e)
{
changeBtnEnable(false);
studentInfoDGV.Visible = false;
studentInfoGroup.Text = "添加学生";
stuAdd = new StudentAdd();
stuAdd.Disposed += new EventHandler(stuOperation_Disposed);
studentInfoGroup.Controls.Add(stuAdd);
stuAdd.Dock = DockStyle.Fill;
}
public StudentManage()
{
InitializeComponent();
stuAdd = null;
stuEdit = null;
stuFind = null;
}