public void btnSave_Click(object sender, System.EventArgs e)
        {
            try
            {
                if (!SharedSupport.SecurityIsAllowed(courseId, SecurityAction.USER_ADD))
                {
                    // Note that Redirect ends page execution.
                    Response.Redirect(@"../Error.aspx?ErrorDetail=" + "Global_Unauthorized");
                }
                btnCancel.Enabled  = true;
                btnSave.Enabled    = true;
                btnSave.Visible    = true;
                Nav1.Feedback.Text = String.Empty;

                AssignmentManager.Common.Functions func = new AssignmentManager.Common.Functions();
                string importID = func.ValidateStringQueryStringParameter(this.Request, "ImportID");

                if (ImportUsers.CommitImport(importID))
                {
                    // Records saved successfully redirect to Users page.
                    Response.Redirect("Users.aspx?CourseID=" + Request.QueryString.Get("CourseID").ToString(), false);
                }
                else
                {
                    throw new ApplicationException();
                }
            }
            catch
            {
                Nav1.Feedback.Text = SharedSupport.GetLocalizedString("AdminResults_UpdateFailed");
                btnCancel.Enabled  = true;
                btnSave.Enabled    = false;
                btnSave.Visible    = false;
            }
        }
        public void btnCancel_Click(object sender, System.EventArgs e)
        {
            try
            {
                btnCancel.Enabled = true;
                btnSave.Enabled   = true;
                btnSave.Visible   = true;
                //Delete all imported users with status of pending and userid = loggedin user
                Nav1.Feedback.Text = String.Empty;

                AssignmentManager.Common.Functions func = new AssignmentManager.Common.Functions();
                string importID = func.ValidateStringQueryStringParameter(this.Request, "ImportID");
                ImportUsers.AbortImport(importID);
                Response.Redirect("Users.aspx?CourseID=" + Request.QueryString.Get("CourseID").ToString(), false);
            }
            catch
            {
                Nav1.Feedback.Text = SharedSupport.GetLocalizedString("AdminResults_CancelFailed");
                btnCancel.Enabled  = true;
                btnSave.Enabled    = false;
                btnSave.Visible    = false;
            }
        }