private void btnUpdate_Click(object sender, EventArgs e)
{
Course c = CourseManageAction.QueryCourseInfo(tbCourseNo.Text);
InputCourseForm acf = new InputCourseForm(c);
acf.MdiParent = this.MdiParent;
acf.Show();
}
private void button2_Click(object sender, EventArgs e)
{
Course c = CourseManageAction.QueryCourseInfo(tbCourseNo.Text);
CourseManager.OpenCourseForm ocf = new OpenCourseForm(c);
ocf.MdiParent = this.MdiParent;
ocf.Show();
}