ArrayList sorting on stronged typed objects

  • Thread starter Thread starter JDeats
  • Start date Start date
J

JDeats

If I have

class Student
{
public string LastName
public string FirstName
public int Age;
public int ID;
}

and I have an ArrayList that's storing only Student objects, how can I
sort the ArrayList by LastName? Using a IComparer class appears to only
allow < > comparisons on a numeric field...
 
JDeats,

You investigated already the power of the DataTable Class, it is completely
build in, so very cheap to use and can used to be inherited and than
completely strongly typed.

Cor
 
JDeats said:
If I have

class Student
{
public string LastName
public string FirstName
public int Age;
public int ID;
}

and I have an ArrayList that's storing only Student objects, how can I
sort the ArrayList by LastName? Using a IComparer class appears to only
allow < > comparisons on a numeric field...
Click to expand...

No, IComparer is the way to go here - just return the value of
x.LastName.CompareTo(y.LastName);
 
Actually, CompareTo() is defined in IComparable. IComparer defines Compare().
--
Dale Preston
MCAD C#
MCSE, MCDBA
 
Dale said:
Actually, CompareTo() is defined in IComparable. IComparer defines
Compare().
Click to expand...

Indeed - but I was suggesting calling String.CompareTo when
implementing Compare.
 
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