protected void Page_Load(object sender, EventArgs e)
{
string CourseID = Session["SelectedCourseID"].ToString();
List <DAL.Lesson> lessonlist = CourseBl.getLessonList(CourseID).ToList();
Session["Lesson"] = lessonlist;
if (lessonlist != null)
{
this.gvLesson.DataSource = lessonlist;
this.gvLesson.DataBind();
}
else
{
ScriptManager.RegisterClientScriptBlock(this, this.GetType(), "alertMessage", "alert('There's no lesson in this course.')", true);
}
}