OnRemoveTable() protected method

This method should be overriden by subclasses to restrict tables being removed.
protected OnRemoveTable ( DataTable table ) : void
table DataTable
return void
DataSet Class Documentation
Example #1
0
        internal bool CanRemove(DataTable table, bool fThrowException)
        {
            IntPtr hscp;

            Bid.ScopeEnter(out hscp, "<ds.DataTableCollection.CanRemove|INFO> %d#, table=%d, fThrowException=%d{bool}\n", ObjectID, (table != null)? table.ObjectID : 0, fThrowException);
            try {
                if (table == null)
                {
                    if (!fThrowException)
                    {
                        return(false);
                    }
                    else
                    {
                        throw ExceptionBuilder.ArgumentNull("table");
                    }
                }
                if (table.DataSet != dataSet)
                {
                    if (!fThrowException)
                    {
                        return(false);
                    }
                    else
                    {
                        throw ExceptionBuilder.TableNotInTheDataSet(table.TableName);
                    }
                }

                // allow subclasses to throw.
                dataSet.OnRemoveTable(table);

                if (table.ChildRelations.Count != 0 || table.ParentRelations.Count != 0)
                {
                    if (!fThrowException)
                    {
                        return(false);
                    }
                    else
                    {
                        throw ExceptionBuilder.TableInRelation();
                    }
                }

                for (ParentForeignKeyConstraintEnumerator constraints = new ParentForeignKeyConstraintEnumerator(dataSet, table); constraints.GetNext();)
                {
                    ForeignKeyConstraint constraint = constraints.GetForeignKeyConstraint();
                    if (constraint.Table == table && constraint.RelatedTable == table) // we can go with (constraint.Table ==  constraint.RelatedTable)
                    {
                        continue;
                    }
                    if (!fThrowException)
                    {
                        return(false);
                    }
                    else
                    {
                        throw ExceptionBuilder.TableInConstraint(table, constraint);
                    }
                }

                for (ChildForeignKeyConstraintEnumerator constraints = new ChildForeignKeyConstraintEnumerator(dataSet, table); constraints.GetNext();)
                {
                    ForeignKeyConstraint constraint = constraints.GetForeignKeyConstraint();
                    if (constraint.Table == table && constraint.RelatedTable == table) // bug 97670
                    {
                        continue;
                    }

                    if (!fThrowException)
                    {
                        return(false);
                    }
                    else
                    {
                        throw ExceptionBuilder.TableInConstraint(table, constraint);
                    }
                }

                return(true);
            }
            finally{
                Bid.ScopeLeave(ref hscp);
            }
        }
Example #2
0
        internal bool CanRemove([NotNullWhen(true)] DataTable?table, bool fThrowException)
        {
            long logScopeId = DataCommonEventSource.Log.EnterScope("<ds.DataTableCollection.CanRemove|INFO> {0}, table={1}, fThrowException={2}", ObjectID, (table != null) ? table.ObjectID : 0, fThrowException);

            try
            {
                if (table == null)
                {
                    if (!fThrowException)
                    {
                        return(false);
                    }
                    throw ExceptionBuilder.ArgumentNull(nameof(table));
                }
                if (table.DataSet != _dataSet)
                {
                    if (!fThrowException)
                    {
                        return(false);
                    }
                    throw ExceptionBuilder.TableNotInTheDataSet(table.TableName);
                }

                // allow subclasses to throw.
                _dataSet.OnRemoveTable(table);

                if (table.ChildRelations.Count != 0 || table.ParentRelations.Count != 0)
                {
                    if (!fThrowException)
                    {
                        return(false);
                    }
                    throw ExceptionBuilder.TableInRelation();
                }

                for (ParentForeignKeyConstraintEnumerator constraints = new ParentForeignKeyConstraintEnumerator(_dataSet, table); constraints.GetNext();)
                {
                    ForeignKeyConstraint constraint = constraints.GetForeignKeyConstraint();
                    if (constraint.Table == table && constraint.RelatedTable == table) // we can go with (constraint.Table ==  constraint.RelatedTable)
                    {
                        continue;
                    }
                    if (!fThrowException)
                    {
                        return(false);
                    }
                    else
                    {
                        throw ExceptionBuilder.TableInConstraint(table, constraint);
                    }
                }

                for (ChildForeignKeyConstraintEnumerator constraints = new ChildForeignKeyConstraintEnumerator(_dataSet, table); constraints.GetNext();)
                {
                    ForeignKeyConstraint constraint = constraints.GetForeignKeyConstraint();
                    if (constraint.Table == table && constraint.RelatedTable == table)
                    {
                        continue;
                    }

                    if (!fThrowException)
                    {
                        return(false);
                    }
                    else
                    {
                        throw ExceptionBuilder.TableInConstraint(table, constraint);
                    }
                }

                return(true);
            }
            finally
            {
                DataCommonEventSource.Log.ExitScope(logScopeId);
            }
        }