internal void SetParentRowToDBNull(DataRelation relation)
{
Debug.Assert(relation != null, "The relation should not be null here.");
if (this.Table == null)
{
throw ExceptionBuilder.ChildRowNotInTheTable();
}
if (relation.ChildKey.Table != this.Table)
{
throw ExceptionBuilder.SetParentRowTableMismatch(relation.ChildKey.Table.TableName, this.Table.TableName);
}
if (tempRecord == -1)
{
BeginEdit();
}
int count = relation.ChildKey.Columns.Length;
for (int i = 0; i < count; i++)
{
this[relation.ChildKey.Columns[i]] = DBNull.Value;
}
if (tempRecord == -1)
{
EndEdit();
}
}
internal void SetParentRowToDBNull()
{
if (this.Table == null)
{
throw ExceptionBuilder.ChildRowNotInTheTable();
}
foreach (DataRelation relation in this.Table.ParentRelations)
{
SetParentRowToDBNull(relation);
}
}
/// <include file='doc\DataRow.uex' path='docs/doc[@for="DataRow.SetParentRow1"]/*' />
/// <devdoc>
/// <para>
/// Sets current row's parent row with specified relation.
/// </para>
/// </devdoc>
public void SetParentRow(DataRow parentRow, DataRelation relation)
{
if (relation == null)
{
SetParentRow(parentRow);
return;
}
if (parentRow == null)
{
SetParentRowToDBNull(relation);
return;
}
if (this.Table == null)
{
throw ExceptionBuilder.ChildRowNotInTheTable();
}
if (parentRow.Table == null)
{
throw ExceptionBuilder.ParentRowNotInTheTable();
}
if (this.Table.DataSet != parentRow.Table.DataSet)
{
throw ExceptionBuilder.ParentRowNotInTheDataSet();
}
if (relation.ChildKey.Table != this.Table)
{
throw ExceptionBuilder.SetParentRowTableMismatch(relation.ChildKey.Table.TableName, this.Table.TableName);
}
if (relation.ParentKey.Table != parentRow.Table)
{
throw ExceptionBuilder.SetParentRowTableMismatch(relation.ParentKey.Table.TableName, parentRow.Table.TableName);
}
object[] parentKeyValues = parentRow.GetKeyValues(relation.ParentKey);
this.SetKeyValues(relation.ChildKey, parentKeyValues);
}
/// <include file='doc\DataRow.uex' path='docs/doc[@for="DataRow.SetParentRow"]/*' />
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
public void SetParentRow(DataRow parentRow)
{
if (parentRow == null)
{
SetParentRowToDBNull();
return;
}
if (this.Table == null)
{
throw ExceptionBuilder.ChildRowNotInTheTable();
}
if (parentRow.Table == null)
{
throw ExceptionBuilder.ParentRowNotInTheTable();
}
foreach (DataRelation relation in this.Table.ParentRelations)
{
if (relation.ParentKey.Table == parentRow.Table)
{
object[] parentKeyValues = parentRow.GetKeyValues(relation.ParentKey);
this.SetKeyValues(relation.ChildKey, parentKeyValues);
if (relation.Nested)
{
if (parentRow.Table == this.Table)
{
this.CheckForLoops(relation);
}
else
{
this.GetParentRow(relation);
}
}
}
}
}
