internal override void CheckConstraint(DataRow childRow, DataRowAction action) { if ((action == DataRowAction.Change || action == DataRowAction.Add || action == DataRowAction.Rollback) && Table.DataSet != null && Table.DataSet.EnforceConstraints && childRow.HasKeyChanged(_childKey)) { // This branch is for cascading case verification. DataRowVersion version = (action == DataRowAction.Rollback) ? DataRowVersion.Original : DataRowVersion.Current; object[] childKeyValues = childRow.GetKeyValues(_childKey); // check to see if this is just a change to my parent's proposed value. if (childRow.HasVersion(version)) { // this is the new proposed value for the parent. DataRow parentRow = DataRelation.GetParentRow(ParentKey, ChildKey, childRow, version); if (parentRow != null && parentRow._inCascade) { object[] parentKeyValues = parentRow.GetKeyValues(_parentKey, action == DataRowAction.Rollback ? version : DataRowVersion.Default); int parentKeyValuesRecord = childRow.Table.NewRecord(); childRow.Table.SetKeyValues(_childKey, parentKeyValues, parentKeyValuesRecord); if (_childKey.RecordsEqual(childRow._tempRecord, parentKeyValuesRecord)) { return; } } } // now check to see if someone exists... it will have to be in a parent row's current, not a proposed. object[] childValues = childRow.GetKeyValues(_childKey); if (!IsKeyNull(childValues)) { Index parentIndex = _parentKey.GetSortIndex(); if (!parentIndex.IsKeyInIndex(childValues)) { // could be self-join constraint if (_childKey.Table == _parentKey.Table && childRow._tempRecord != -1) { int lo = 0; for (lo = 0; lo < childValues.Length; lo++) { DataColumn column = _parentKey.ColumnsReference[lo]; object value = column.ConvertValue(childValues[lo]); if (0 != column.CompareValueTo(childRow._tempRecord, value)) { break; } } if (lo == childValues.Length) { return; } } throw ExceptionBuilder.ForeignKeyViolation(ConstraintName, childKeyValues); } } } }
public DataRow GetParentRow(DataRelation relation, DataRowVersion version) { if (relation == null) { return(null); } if (relation.DataSet != this._table.DataSet) { throw ExceptionBuilder.RelationForeignRow(); } if (relation.ChildKey.Table != this._table) { throw ExceptionBuilder.GetParentRowTableMismatch(relation.ChildTable.TableName, this._table.TableName); } return(DataRelation.GetParentRow(relation.ParentKey, relation.ChildKey, this, version)); }
internal override void CheckConstraint(DataRow childRow, DataRowAction action) { if (((((action == DataRowAction.Change) || (action == DataRowAction.Add)) || (action == DataRowAction.Rollback)) && ((this.Table.DataSet != null) && this.Table.DataSet.EnforceConstraints)) && childRow.HasKeyChanged(this.childKey)) { DataRowVersion version = (action == DataRowAction.Rollback) ? DataRowVersion.Original : DataRowVersion.Current; object[] keyValues = childRow.GetKeyValues(this.childKey); if (childRow.HasVersion(version)) { DataRow row = DataRelation.GetParentRow(this.ParentKey, this.ChildKey, childRow, version); if ((row != null) && row.inCascade) { object[] objArray2 = row.GetKeyValues(this.parentKey, (action == DataRowAction.Rollback) ? version : DataRowVersion.Default); int record = childRow.Table.NewRecord(); childRow.Table.SetKeyValues(this.childKey, objArray2, record); if (this.childKey.RecordsEqual(childRow.tempRecord, record)) { return; } } } object[] values = childRow.GetKeyValues(this.childKey); if (!this.IsKeyNull(values) && !this.parentKey.GetSortIndex().IsKeyInIndex(values)) { if ((this.childKey.Table == this.parentKey.Table) && (childRow.tempRecord != -1)) { int index = 0; index = 0; while (index < values.Length) { DataColumn column = this.parentKey.ColumnsReference[index]; object obj2 = column.ConvertValue(values[index]); if (column.CompareValueTo(childRow.tempRecord, obj2) != 0) { break; } index++; } if (index == values.Length) { return; } } throw ExceptionBuilder.ForeignKeyViolation(this.ConstraintName, keyValues); } } }
internal override void CheckConstraint(DataRow childRow, DataRowAction action) { Debug.Assert(Table.DataSet != null, "Relation " + ConstraintName + " isn't part of a DataSet, so this check shouldn't be happening."); if ((action == DataRowAction.Change || action == DataRowAction.Add || action == DataRowAction.Rollback) && Table.DataSet != null && Table.DataSet.EnforceConstraints && childRow.HasKeyChanged(childKey)) { // This branch is for cascading case verification. DataRowVersion version = (action == DataRowAction.Rollback) ? DataRowVersion.Original : DataRowVersion.Current; object[] childKeyValues = childRow.GetKeyValues(childKey); // check to see if this is just a change to my parent's proposed value. if (childRow.HasVersion(version)) { // this is the new proposed value for the parent. DataRow parentRow = DataRelation.GetParentRow(this.ParentKey, this.ChildKey, childRow, version); if (parentRow != null && parentRow.inCascade) { object[] parentKeyValues = parentRow.GetKeyValues(parentKey, action == DataRowAction.Rollback ? version : DataRowVersion.Default); #if DEBUG if (CompModSwitches.Data_Constraints.TraceVerbose) { Debug.WriteLine("Parent and Child values on constraint check."); for (int i = 0; i < childKeyValues.Length; i++) { Debug.WriteLine("... " + i.ToString() + ": " + Convert.ToString(parentKeyValues[i]) + ", " + Convert.ToString(childKeyValues[i])); } } #endif int parentKeyValuesRecord = childRow.Table.NewRecord(); childRow.Table.SetKeyValues(childKey, parentKeyValues, parentKeyValuesRecord); if (childKey.RecordsEqual(childRow.tempRecord, parentKeyValuesRecord)) { return; } } } // now check to see if someone exists... it will have to be in a parent row's current, not a proposed. object[] childValues = childRow.GetKeyValues(childKey); if (!IsKeyNull(childValues)) { Index parentIndex = parentKey.GetSortIndex(); if (!parentIndex.IsKeyInIndex(childValues)) { // could be self-join constraint if (childKey.Table == parentKey.Table && childRow.tempRecord != -1) { int lo = 0; for (lo = 0; lo < childValues.Length; lo++) { if (parentKey.Columns[lo].CompareToValue(childRow.tempRecord, childValues[lo]) != 0) { break; } } if (lo == childValues.Length) { return; } } throw ExceptionBuilder.ForeignKeyViolation(ConstraintName, childKeyValues); } } } }