public override string ToString()
{
// (course type): Name=(course name); Teacher=(teacher name); Topics=[(course topics – comma separated)];
// Lab=(lab name – when applicable); Town=(town name – when applicable);
StringBuilder result = new StringBuilder();
result.AppendFormat("{0}: Name={1}", this.GetType().Name, this.Name);
if (this.Teacher != null)
{
result.AppendFormat("; Teacher={0}", this.Teacher.Name);
}
if (this.topics.Count > 0)
{
result.Append("; Topics=[");
foreach (var topic in this.topics)
{
result.Append(topic + ", ");
}
result.Length -= 2;
result.Append("]");
}
if (this is LocalCourse)
{
LocalCourse course = this as LocalCourse;
result.AppendFormat("; Lab={0}", course.Lab);
}
else if (this is OffsiteCourse)
{
OffsiteCourse course = this as OffsiteCourse;
result.AppendFormat("; Town={0}", course.Town);
}
return(result.ToString());
}
public IOffsiteCourse CreateOffsiteCourse(string name, ITeacher teacher, string town)
{
if (name == null || town == null)
{
throw new ArgumentNullException("Either name or town are null");
}
else
{
IOffsiteCourse course = new OffsiteCourse();
course.Name = name;
course.Teacher = teacher;
course.Town = town;
return(course);
}
}
static void Main()
{
LocalCourse localCourse = new LocalCourse("Databases");
Console.WriteLine(localCourse);
localCourse.Lab = "Enterprise";
Console.WriteLine(localCourse);
localCourse.Students = new List<string>() { "Peter", "Maria" };
Console.WriteLine(localCourse);
localCourse.TeacherName = "Svetlin Nakov";
localCourse.AddStudent("Milena");
localCourse.AddStudent("Todor");
Console.WriteLine(localCourse);
OffsiteCourse offsiteCourse = new OffsiteCourse(
"PHP and WordPress Development", "Mario Peshev",
new List<string>() { "Thomas", "Ani", "Steve" });
Console.WriteLine(offsiteCourse);
}
public IOffsiteCourse CreateOffsiteCourse(string name, ITeacher teacher, string town)
{
var offsiteCourse = new OffsiteCourse(name, teacher, town);
return offsiteCourse;
}
public IOffsiteCourse CreateOffsiteCourse(string name, ITeacher teacher, string town)
{
ICourse offsiteCourse = new OffsiteCourse(name, teacher, town);
return((IOffsiteCourse)offsiteCourse);
}
public IOffsiteCourse CreateOffsiteCourse(string name, ITeacher teacher, string town)
{
if (name == null || town == null)
{
throw new ArgumentNullException("Either name or town are null");
}
else
{
IOffsiteCourse course = new OffsiteCourse();
course.Name = name;
course.Teacher = teacher;
course.Town = town;
return course;
}
}
