Add a Single Parent to Single Child Relationship

If you have two views within WebHierarchicalDataSource™ and want to show them as a hierarchy, you need to add a data relation for the two views. You can add a relation both at design time and run time. At design time, open the Quick Designer and configure the parent and child data sources along with the parent column and child column for use in the relation. At run time, you can add a data relation to the DataRelations collection.

Note

Note:

When adding data relations, make sure that the data sources obey rules of referential integrity. The WebHierarchicalDataSource component does not enforce these rules and you will not be notified when a rule is broken. For example, if the records in your child data are not all related to the parent data, this is simply ignored and the data that are related are shown. Also, if the data type of your primary key and foreign key columns do not match, only the parent records are shown.

In Visual Basic:

' Create the relation
Dim dr As New Infragistics.Web.UI.DataSourceControls.DataRelation()
' Specify the parent view in the relation
dr.ParentDataViewID = "SqlDataSource_View1"
' Specify the parent column to use for the relation
dr.ParentColumns = New String() {"RegionID"}
' Specify the child view in the relation
dr.ChildDataViewID = "SqlDataSource_View2"
'Specify the child column to use in the relation
dr.ChildColumns = New String() {"RegionID"}
' Add the relation to WebHierarchicalDataSource
Me.WebHierarchicalDataSource1.DataRelations.Add(dr)

In C#:

// Create the relation
Infragistics.Web.UI.DataSourceControls.DataRelation dr =
new Infragistics.Web.UI.DataSourceControls.DataRelation();
// Specify the parent view in the relation
dr.ParentDataViewID = "SqlDataSource_View1";
// Specify the parent column to use for the relation
dr.ParentColumns = new string[] {"RegionID"};
// Specify the child view in the relation
dr.ChildDataViewID = "SqlDataSource_View2";
//Specify the child column to use in the relation
dr.ChildColumns = new string[] {"RegionID"};
// Add the relation to WebHierarchicalDataSource
this.WebHierarchicalDataSource1.DataRelations.Add(dr);

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Add a Single Parent to Single Child Relationship

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