public string SaveAssignedCourse(AssignCourse assignCourse) { if (assignCourseGateway.IsCourseAssigned(assignCourse.Course_Id)) { int rowAfeected = assignCourseGateway.SaveAssignedCourse(assignCourse); if (rowAfeected > 0) { decimal tempCredit = assignCourse.Creditremain - assignCourse.Credit; int rowAfeectedbyUpdate = aTeacherGateway.UpdateCredittoremain(tempCredit, assignCourse.Teacher_Id); if (rowAfeectedbyUpdate > 0) { return("Course Assigend sucessfull"); } else { return("Credit no updated"); } //return "Course Assigend sucessfull"; } else { return("Course Assigend not sucessfull"); } } else { return("Course Already Assigned"); } }