DataRow.GetParentRow Method (DataRelation, DataRowVersion)

 
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Gets the parent row of a DataRow using the specified DataRelation, and DataRowVersion.

Namespace:   System.Data
Assembly:  System.Data (in System.Data.dll)

public DataRow GetParentRow(
	DataRelation relation,
	DataRowVersion version
)

Parameters

relation
Type: System.Data.DataRelation

The DataRelation to use.

version
Type: System.Data.DataRowVersion

One of the DataRowVersion values specifying the version of the data to get.

Return Value

Type: System.Data.DataRow

The parent DataRow of the current row.

Exception Condition
ArgumentNullException

The row is null.

The relation does not belong to this table's parent relations.

DataException

A child row has multiple parents.

InvalidConstraintException

The relation's child table is not the table the row belongs to.

RowNotInTableException

The row does not belong to a table.

VersionNotFoundException

The row does not have this version of data.

In a DataSet, the collection of all parent DataRelation objects for the data set is returned by the GetParentRows method.

The DataTable also contains a collection of DataRelation objects, returned by the ParentRelations property.

Use the HasVersion property to determine whether the DataRowVersion that you want exists.

The following example uses the GetParentRow to return the child DataRow objects for every child DataRelation in a DataTable. The value of each column in the row is then printed.

private void GetParentRowForTable(DataTable thisTable, 
    DataRelation relation,
    DataRowVersion version) 
{
    if(thisTable ==null){return;}
    // For each row in the table, print column 1 of the 
    // parent DataRow.
    DataRow parentRow;
    foreach(DataRow row in thisTable.Rows)
    {
        parentRow = row.GetParentRow(relation, version);
        Console.Write("\table child row: " + row[1]);
        Console.Write("\table parent row: " + parentRow[1]+ "\n");
    }
}

private void CallGetParentRowForTable() 
{
    // An example of calling the function.
    DataTable thisTable = DataSet1.Tables["Products"];
    DataRelation relation = thisTable.ParentRelations[0];
    // Print only original versions of parent rows.
    GetParentRowForTable(thisTable, relation,
        DataRowVersion.Original);
}

.NET Framework
Available since 1.1
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