DeleteRelationship Method

In This Topic

Removes a relationship between the two specified rows. This method must be called on the MCT. Use QueuedTask.Run.

Syntax

Visual Basic (Declaration)
C#

Public Sub DeleteRelationship( _
   ByVal originRow As Row, _
   ByVal destinationRow As Row _
)

public void DeleteRelationship( 
   Row originRow,
   Row destinationRow
)

Parameters

originRow: The Row from the origin table.
destinationRow: The Row from the destination table.

Exceptions

Exception	Description
System.ArgumentException	originRow or destinationRow is null.
System.NotSupportedException	This relationship class does not support this operation. For example, it is a virtual relationship class.
ArcGIS.Core.Data.Exceptions.GeodatabaseException	A geodatabase-related exception has occurred.

Remarks

For relationships of type RelationshipCardinality.OneToOne or RelationshipCardinality.OneToMany deleting a relationship will write a null value to the destination row's origin foreign key field. For relationships of type RelationshipCardinality.ManyToMany, delete removes the relationship by removing the entry containing the origin foreign and destination foreign keys from the intermediate table.

Example

Deleting a Relationship

{
  await QueuedTask.Run(() =>
  {
    using (Geodatabase geodatabase = new Geodatabase(new DatabaseConnectionFile(new Uri("path\\to\\sde\\file"))))
    using (RelationshipClass relationshipClass = geodatabase.OpenDataset<RelationshipClass>("LocalGovernment.GDB.luCodeViolationHasInspections"))
    using (FeatureClass violationsFeatureClass = geodatabase.OpenDataset<FeatureClass>("LocalGovernment.GDB.luCodeViolation"))
    {
      QueryFilter queryFilter = new QueryFilter { WhereClause = "LOCDESC LIKE '%Jefferson%'" };

      using (RowCursor rowCursor = violationsFeatureClass.Search(queryFilter, false))
      {
        if (!rowCursor.MoveNext())
          return;

        using (Row jeffersonAveViolation = rowCursor.Current)
        {
          IReadOnlyList<Row> relatedDestinationRows = relationshipClass.GetRowsRelatedToOriginRows(new List<long>
              { jeffersonAveViolation.GetObjectID() });

          try
          {
            EditOperation editOperation = new EditOperation();
            editOperation.Callback(context =>
            {
              foreach (Row relatedDestinationRow in relatedDestinationRows)
              {
                try
                {
                  relationshipClass.DeleteRelationship(jeffersonAveViolation, relatedDestinationRow);
                }
                catch (GeodatabaseRelationshipClassException exception)
                {
                  Console.WriteLine(exception);
                }
              }
            }, relationshipClass);

            bool editResult = editOperation.Execute();
          }
          finally
          {
            foreach (Row row in relatedDestinationRows)
              row.Dispose();
          }
        }
      }
    }
  });
}

Requirements

Target Platforms: Windows 11 Home, Pro, Enterprise (64 bit)

ArcGIS Pro version: 3.0 or higher.

Reference

RelationshipClass Class
RelationshipClass Members

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