//刷新教师的课程
private void button5_Click(object sender, EventArgs e)
{
CourseBusiness couBusiness = new CourseBusiness();
DataTable dt = couBusiness.getAllCourseByTid(new TeacherBusiness().getTidByUid(this.userModel.Uid));
this.dataGridView1.AutoGenerateColumns = false;
this.dataGridView1.DataSource = dt;
DataGridViewComboBoxColumn cob1 = new DataGridViewComboBoxColumn();
cob1 = (DataGridViewComboBoxColumn)this.dataGridView1.Columns["pid"];
cob1.DataSource = new PlaceBusiness().getAllPlace();
cob1.DisplayMember = "pname";
cob1.ValueMember = "pid";
}
