public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
{
if (destinationType == null)
{
throw new ArgumentNullException(nameof(destinationType));
}
if (destinationType == typeof(InstanceDescriptor) && value is Constraint)
{
if (value is UniqueConstraint)
{
UniqueConstraint constr = (UniqueConstraint)value;
Reflection.ConstructorInfo ctor = typeof(UniqueConstraint).GetConstructor(new Type[] { typeof(string), typeof(string[]), typeof(bool) });
if (ctor != null)
{
return new InstanceDescriptor(ctor, new object[] { constr.ConstraintName, constr.ColumnNames, constr.IsPrimaryKey });
}
}
else
{
ForeignKeyConstraint constr = (ForeignKeyConstraint)value;
System.Reflection.ConstructorInfo ctor =
typeof(ForeignKeyConstraint).GetConstructor(new Type[] { typeof(string), typeof(string), typeof(string[]),
typeof(string[]), typeof(AcceptRejectRule), typeof(Rule), typeof(Rule) });
if (ctor != null)
{
return new InstanceDescriptor(ctor, new object[] { constr.ConstraintName, constr.ParentKey.Table.TableName, constr.ParentColumnNames,
constr.ChildColumnNames, constr.AcceptRejectRule, constr.DeleteRule, constr.UpdateRule });
}
}
}
return base.ConvertTo(context, culture, value, destinationType);
}
}
