protected void btnUpload_Click(object sender, EventArgs e)
{
LectureNote lNote = new LectureNote();
lNote.LectureId = -1;
lNote.CourseId = Session["courseID"].ToString();
//Check whether or not the title is specified.
if (txtboxLectureTitle.Text == String.Empty)
{
ClientScript.RegisterStartupScript(this.GetType(), "errorTitle",
"alert('Please provide title of the lecture note!!!');", true);
}
else
{
lNote.LTitle = txtboxLectureTitle.Text;
//Check whether or not there is valid file to upload.
if (fileuploadLectureNote.HasFile)
{
if (fileuploadLectureNote.PostedFile.ContentType.ToLower() == "application/pdf" ||
fileuploadLectureNote.PostedFile.ContentType.ToLower() == "application/x-mspowerpoint")
{
//Append date and time in the filename to make it unique.
string filename = Path.GetFileNameWithoutExtension(fileuploadLectureNote.FileName) +
DateTime.Now.ToString("_yyyy_mm_dd_HH_mm_ss");
string extension = Path.GetExtension(fileuploadLectureNote.FileName);
string directory = Server.MapPath("~/CourseMaterials/" + Session["courseID"] + "/LectureNote");
//Create directory if no folder toa save the lecture note
if (!Directory.Exists(directory))
{
Directory.CreateDirectory(directory);
}
lNote.LFileLocation = directory + "/" + filename + extension;
fileuploadLectureNote.SaveAs(lNote.LFileLocation);
ClientScript.RegisterStartupScript(this.GetType(), "successUpload",
"alert('Uploaded successfully!!!');", true);
LectureNoteController.Save(lNote);
Response.Redirect("~/InstructorSite/formManageLectureNote.aspx");
}
else //If the file format is invalid.
{
ClientScript.RegisterStartupScript(this.GetType(), "fileFormatError",
"alert('File format error: Only pdf or ppt files are allowed!!!');",
true);
}
}
else //If the path doesn't contain any file
{
ClientScript.RegisterStartupScript(this.GetType(), "failUpload",
"alert('Please specify the file to upload.!!!');", true);
}
}
}
protected void dlCommandItem(object sender, DataListCommandEventArgs e)
{
string filePath = ((Label)e.Item.FindControl("lblLFileLocation")).Text;
if (e.CommandName == "View")
{
DownloadFile(filePath, true);
}
else
{
//Call to delete the lecture note
//Get the lecture ID
Int32 lectureID = Convert.ToInt32(((Label)e.Item.FindControl("lblLectureNoteID")).Text);
//Get file location of the lecture note.
string filePathToDelete = ((Label)e.Item.FindControl("lblLFileLocation")).Text;
LectureNoteController.Delete(lectureID);
File.Delete(filePath);
Helper.ViewLectureNote(dlLectureNotes, Session["CourseID"].ToString());
}
}