MetaJoinTableAssociation

The MetaJoinTableAssociation class represents a join table association in the Telerik Data Access metadata model. It derives from the MetaAssociation class. The MetaJoinTableAssociation class describes many-to-many associations between two classes and gives the following information:

• JoinTable - gets the join table used by the current association.
• FromConstraintName - gets the name of the foreign key constraint that is used to enforce the 'from end' of the association.
• ToConstraintName - gets the name of the foreign key constraint that is used to enforce the 'to end' of the association.
• KeyConstraintName - gets the name of the foreign key constraint that is used to associate the key values of this association with the join table.
• SequenceColumn - gets the sequence column for the join table used by the current association.

The following example shows you how to access all many-to-many associations from your model:

private string GetMetaJoinTableAssociations(Telerik.OpenAccess.Metadata
    .MetadataContainer container)
{
   StringBuilder sb = new StringBuilder();
   foreach (MetaAssociation metaAssociation in container.Associations)
   {
       sb.AppendFormat("\nType: {0}", metaAssociation.AssociationType);
       MetaJoinTableAssociation manyToMany = metaAssociation as MetaJoinTableAssociation;
       if (manyToMany == null)
       {
           continue;
       }
       sb.AppendFormat("\n\tSource: {0}", manyToMany.Source.Name);
       sb.AppendFormat("\n\tTarget: {0}", manyToMany.Target.Name);
   }
   return sb.ToString();
}

Private Function GetMetaJoinTableAssociations(ByVal container As  _
    Telerik.OpenAccess.Metadata.MetadataContainer) As String
 Dim sb As New StringBuilder()
 For Each _metaAssociation As MetaAssociation In container.Associations
  sb.AppendFormat(vbLf & "Type: {0}", _metaAssociation.AssociationType)
  Dim manyToMany As MetaJoinTableAssociation = TryCast(_metaAssociation, MetaJoinTableAssociation)
  If manyToMany Is Nothing Then
   Continue For
  End If
  sb.AppendFormat(vbLf & vbTab & "Source: {0}", manyToMany.Source.Name)
  sb.AppendFormat(vbLf & vbTab & "Target: {0}", manyToMany.Target.Name)
 Next _metaAssociation
 Return sb.ToString()
End Function