GetParentRow Method

In This Topic

This method is called to access the fields of a parent table. Within the Designer, these fields are made available in a folder with a "1:1" icon. If your provider does not support 1:1 relations, simply return false for the SupportsGetParentRow property and throw a NotImplementedException for this method. Be aware however that your users will not be able to access e.g. customer data from an order if you have a 1:n relation between customers and their orders.

Syntax

Visual Basic
C#
C++/CLI

'Declaration
 
Function GetParentRow( _
   ByVal relation As ITableRelation _
) As ITableRow

ITableRow GetParentRow( 
   ITableRelation relation
)

ITableRow^ GetParentRow( 
   ITableRelation^ relation
)

Parameters

relation: The relation to the parent table.

Example

public ITableRow GetParentRow(ITableRelation relation)
{
    DataViewManager manager = _dataRowView.DataView.DataViewManager;
    DataView parentView = manager.CreateDataView(manager.DataSet.Tables[relation.ParentTableName]);
    String childValue = _dataRowView[relation.ChildColumnName].ToString();

    // apply row filter
    parentView.RowFilter = relation.ParentColumnName + "='" + childValue + "'";
    DataRowViewWrapper wrapper = new DataRowViewWrapper(parentView[0]);
    return wrapper;
}

VB.NET

Public Function GetParentRow(relation As ITableRelation) As ITableRow
    Dim manager As DataViewManager = _dataRowView.DataView.DataViewManager
    Dim parentView As DataView = manager.CreateDataView(manager.DataSet.Tables(relation.ParentTableName))
    Dim childValue As [String] = _dataRowView(relation.ChildColumnName).ToString()

    ' apply row filter 
    parentView.RowFilter = relation.ParentColumnName + "='" + childValue + "'"
    Dim wrapper As New DataRowViewWrapper(parentView(0))
    Return wrapper
End Function

Requirements

Platforms: Windows 10 (Version 21H2 - 23H2), Windows 11 (21H2 - 22H2), Windows Server 2016 - 2022
.NET: .NET Framework 4.8, .NET 6, .NET 7, .NET 8

Reference

ITableRow Interface
ITableRow Members

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