protected void btnAdd_Click(object sender, EventArgs e)
        {
            try
            {
                if (Page.IsValid)
                {
                    BEAdmin   objBEAdmin = new BEAdmin();
                    BAdmin    objBAdmin  = new BAdmin();
                    DataTable objDt      = new DataTable();
                    objDt.Columns.Add("InstructorID");
                    objDt.Columns.Add("InstructorName");
                    objDt.Columns.Add("Status");

                    foreach (RadComboBoxItem ChkStudent in rcbInstructor.Items)
                    {
                        DataRow objDr = objDt.NewRow();
                        if (ChkStudent.Checked)
                        {
                            objDr["InstructorID"]   = ChkStudent.Value;
                            objDr["InstructorName"] = ChkStudent.Text;
                            objDr["Status"]         = 1;
                        }
                        else
                        {
                            objDr["InstructorID"]   = ChkStudent.Value;
                            objDr["InstructorName"] = ChkStudent.Text;
                            objDr["Status"]         = 0;
                        }
                        objDt.Rows.Add(objDr);
                    }
                    objDt.AcceptChanges();
                    objBEAdmin.DtResult1 = objDt;

                    objBEAdmin.IntCourseID = Convert.ToInt32(Request.QueryString["CourseID"].ToString());
                    objBAdmin.BAdminUpdateisPrimaryInstructor(objBEAdmin);
                    trMessage.Visible = true;
                    if (objBEAdmin.IntResult.ToString() == "1")
                    {
                        trAddEnrollment.Visible             = false;
                        trAddEnrollmentConfirmation.Visible = true;
                        lblCoursenameConfirmation.Text      = lblCourseName.Text;
                        lblInfo.Text      = Resources.AppMessages.Admin_PrimaryInstructor_Success;
                        lblInfo.ForeColor = System.Drawing.Color.FromName(Resources.AppConfigurations.Color_Success);
                        ImgInfo.ImageUrl  = Resources.AppConfigurations.Image_Success;
                        tdInfo.Attributes.Add("style", Resources.AppConfigurations.Color_Table_Success);
                        gvInstructors.DataSource = objDt.Select("Status=1");
                        gvInstructors.DataBind();
                    }

                    else
                    {
                        trAddEnrollment.Visible             = true;
                        trAddEnrollmentConfirmation.Visible = false;
                        lblInfo.Text      = Resources.AppMessages.Admin_PrimaryInstructor_Failed;
                        lblInfo.ForeColor = System.Drawing.Color.FromName(Resources.AppConfigurations.Color_Error);
                        ImgInfo.ImageUrl  = Resources.AppConfigurations.Image_Error;
                        tdInfo.Attributes.Add("style", Resources.AppConfigurations.Color_Table_Error);
                    }
                }
            }
            catch (Exception)
            {
            }
        }