FederationDataSource.Relations Property

Provides access to the collection of the FederationMasterDetailInfo objects that define master-detail relationships.

Namespace: DevExpress.DataAccess.DataFederation

Assembly: DevExpress.DataAccess.v21.2.dll

Declaration

public MasterDetailInfoCollection Relations { get; }

Property Value

Type Description
MasterDetailInfoCollection

A collection of master-detail relationships.

Example

To create a master-detail relationship between two queries, add an instance of the FederationMasterDetailInfo object to the Relations collection:

Note

The complete sample project How to Create a Federated Data Source at Runtime is available in the DevExpress Examples repository.

using DevExpress.DataAccess.DataFederation;
// ...
  federation.Relations.Add(new FederationMasterDetailInfo() {
      MasterQueryName = "Orders",
      DetailQueryName = "OrderDetail",
      KeyColumns = {
          new FederationRelationColumnInfo(){
              ParentKeyColumn="OrderID",
              NestedKeyColumn ="OrderID",
              ConditionOperator= FederationConditionType.Equal
              }
          }
  }

The following code snippet (auto-collected from DevExpress Examples) contains a reference to the Relations property.

Note

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See Also