public void AddExceptions()
{
ConstraintCollection col = _table.Constraints;
//null
try {
col.Add(null);
Assert.Fail("B1: Failed to throw ArgumentNullException.");
} catch (ArgumentNullException) {
} catch (AssertionException exc) {
throw exc;
} catch {
Assert.Fail("A1: Wrong exception type");
}
//duplicate name
try {
_constraint1.ConstraintName = "Dog";
_constraint2.ConstraintName = "dog"; //case insensitive
col.Add(_constraint1);
col.Add(_constraint2);
col.Remove(_constraint2); // only for !1.0
col.Remove(_constraint1);
}
catch (AssertionException exc) {
throw exc;
}
/* Don't use such catch. They cover our eyes from the exact exception location.
* catch (Exception exc)
* {
* Assert.Fail("A2: Wrong exception type. " + exc.ToString());
* }
*/
//Constraint Already exists
try {
col.Add(_constraint1);
col.Remove(_constraint1);
} catch (ArgumentException) {
} catch (AssertionException exc) {
throw exc;
} catch {
Assert.Fail("A3: Wrong exception type");
}
}
// <Snippet1>
private void RemoveConstraint(ConstraintCollection constraints,
Constraint constraint)
{
if (constraints.Contains(constraint.ConstraintName))
{
if (constraints.CanRemove(constraint))
{
constraints.Remove(constraint.ConstraintName);
}
}
}
// <Snippet1>
public static void RemoveConstraint(
ConstraintCollection constraints, Constraint constraint)
{
try
{
if (constraints.Contains(constraint.ConstraintName))
{
if (constraints.CanRemove(constraint))
{
constraints.Remove(constraint.ConstraintName);
}
}
}
catch (Exception e)
{
// Process exception and return.
Console.WriteLine("Exception of type {0} occurred.",
e.GetType());
}
}
