private void yxm_SelectedIndexChanged(object sender, EventArgs e)//院系改变，课程下拉框数据源改变
{
DepartmentBLL departmentBLL = new DepartmentBLL();
CourseBLL courseBLL = new CourseBLL();
kc.DataSource = courseBLL.deptnoGetcname(departmentBLL.GetDeptno(yxm.Text));
}
private void Deptname_Cname_LoadList()//设置目录查询的两个下拉框的数据源
{
DepartmentBLL departmentBLL = new DepartmentBLL();
yxm.DataSource = departmentBLL.GetAllDeptname();
CourseBLL courseBLL = new CourseBLL();
kc.DataSource = courseBLL.deptnoGetcname(departmentBLL.GetDeptno(yxm.Text));
}
