static void ModifyClass()
{
int choice, id;
string choiceTry, idTry;
while (true)
{
while (true)
{
while (true)
{
Console.WriteLine("Please Enter Class ID: ");
idTry = Console.ReadLine();
try
{
id = Int32.Parse(idTry);
if (icb.ClassIsExists(id))
{
break;
}
else
{
Console.WriteLine("This ID Is Not Exists! ");
}
}
catch (Exception e)
{
Console.WriteLine("Please Enter A Number!");
continue;
throw;
}
}
Console.WriteLine(
"////////////////////////////////////////////////////////////////////////////////////" + "\n" +
"/* Modify Class */" + "\n" +
"/* */" + "\n" +
"/* */" + "\n" +
"/* 1. Change Class ID */" + "\n" +
"/* 2. Change Class Name */" + "\n" +
"/* 3. Change Class Teacher Belong */" + "\n" +
"/* 4. Exit */" + "\n" +
"/* */" + "\n" +
"/* Please Enter The Number */" + "\n" +
"/* */" + "\n" +
"////////////////////////////////////////////////////////////////////////////////////" + "\n");
choiceTry = Console.ReadLine();
try
{
choice = Int32.Parse(choiceTry);
break;
}
catch (Exception e)
{
Console.WriteLine("Please Enter A Number!");
continue;
throw;
}
}
if (choice == 1)
{
int newId;
string newIdTry;
while (true)
{
Console.WriteLine("Please Enter The New ID of Class: ");
newIdTry = Console.ReadLine();
try
{
newId = Int32.Parse(newIdTry);
if (icb.ChangeClassId(id, newId))
{
Console.WriteLine("Class ID Changed Successful!");
}
else
{
Console.WriteLine("Class ID Changed Error, New Class ID is Already Exists!");
}
break;
}
catch (Exception e)
{
Console.WriteLine("Class ID Must Be A Number! ");
continue;
throw;
}
}
}
else if (choice == 2)
{
string newName;
Console.WriteLine("Please Enter The New Name of Class: ");
newName = Console.ReadLine();
icb.ChangeClassName(id, newName);
Console.WriteLine("Class Name Changed Successful!");
}
else if (choice == 3)
{
int newTeacherId;
string newTeacherIdTry;
while (true)
{
Console.WriteLine("Please Enter The Teacher ID: ");
newTeacherIdTry = Console.ReadLine();
try
{
newTeacherId = Int32.Parse(newTeacherIdTry);
if (itb.TeacherIsExists(newTeacherId))
{
icb.ChangeClassTeacherBelong(id, newTeacherId);
Console.WriteLine("Changed Class Teacher Belong Successful!");
}
else
{
Console.WriteLine("The Teacher ID Is Not Exists!");
}
break;
}
catch (Exception e)
{
Console.WriteLine("Teacher ID Must Be A Number!");
continue;
throw;
}
}
}
else if (choice == 4)
{
break;
}
else
{
Console.WriteLine("This Choice is Not Exists! ");
}
Work();
}
}
