static void ModifyStudent()
{
int choice, id;
string choiceTry, idTry;
while (true)
{
while (true)
{
while (true)
{
Console.WriteLine("Please Enter Student ID: ");
idTry = Console.ReadLine();
try
{
id = Int32.Parse(idTry);
if (isb.StudentIsExists(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 Student */" + "\n" +
"/* */" + "\n" +
"/* */" + "\n" +
"/* 1. Change Student ID */" + "\n" +
"/* 2. Change Student Name */" + "\n" +
"/* 3. Change Student Subject */" + "\n" +
"/* 4. Change Student Sex */" + "\n" +
"/* 5. Change Student Class Belong */" + "\n" +
"/* 6. 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 New ID of Student: ");
newIdTry = Console.ReadLine();
try
{
newId = Int32.Parse(newIdTry);
isb.ChangeStudentId(id, newId);
break;
}
catch (Exception e)
{
Console.WriteLine("New ID Must Be A Number! ");
continue;
throw;
}
}
}
else if (choice == 2)
{
string newName;
Console.WriteLine("PLease Enter The New Name For This Student: ");
newName = Console.ReadLine();
isb.ChangeStudentName(id, newName);
Console.WriteLine("Name Changed Successful! ");
}
else if (choice == 3)
{
string newSubject;
Console.WriteLine("PLease Enter The New Subject: ");
newSubject = Console.ReadLine();
isb.ChangeStudentName(id, newSubject);
Console.WriteLine("Subject Changed Successful!");
}
else if (choice == 4)
{
string newSex;
Console.WriteLine("Please Enter The New Sex: ");
newSex = Console.ReadLine();
isb.ChangeStudentSex(id, newSex);
Console.WriteLine("Sex Changed Successful!");
}
else if (choice == 5)
{
int newClassId;
string newClassIdTry;
while (true)
{
Console.WriteLine("Please Enter New Class ID: ");
newClassIdTry = Console.ReadLine();
try
{
newClassId = Int32.Parse(newClassIdTry);
if (isb.AddStudentIntoClass(newClassId, id))
{
Console.WriteLine("Change Student Class Belong Successful!");
}
else
{
Console.WriteLine("Changed Error, New Class ID Is Not Exists! ");
}
break;
}
catch (Exception e)
{
Console.WriteLine("Class ID Must Be A Number!");
continue;
throw;
}
}
}
else if (choice == 6)
{
break;
}
else
{
Console.WriteLine("This Choice is Not Exists! ");
}
}
Work();
}