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Updating a DataSet with a Many-to-Many Relationship

[ Team LiB ] Recipe 4.10 Updating a DataSet with a Many-to-Many Relationship Problem You have a DataSet that contains two tables that have a many-to-many relationship between them using a third junction table. | Team LiB Recipe 4.10 Updating a DataSet with a Many-to-Many Relationship Problem You have a DataSet that contains two tables that have a many-to-many relationship between them using a third junction table. You get referential integrity errors when you try to update changes to the data in this DataSet back to the data source. You need to do this successfully. Solution Use the techniques described in the discussion. The schema of table TBL0410Parent used in this solution is shown in Table 4-5. Table 4-5. TBL0410Parent schema Column name Data type Length Allow nulls ParentId int 4 No Fieldl nvarchar 50 Yes Field2 nvarchar 50 Yes The schema of table TBL0410Child used in this solution is shown in Table 4-6. Table 4-6. TBL0410Child schema Column name Data type Length Allow nulls ChildId int 4 No Field3 nvarchar 50 Yes Field4 nvarchar 50 Yes The schema of table TBL0410ParentChild used in this solution is shown in Table 4-7. Table 4-7. TBL0410ParentChild schema Column name Data type Length Allow nulls ParentId int 4 No ChildId int 4 No The solution uses eleven stored procedures described in Table 4-8. Table 4-8. Stored procedures for solution in Recipe 4.10 Name Description SP0410_DeleteChild Deletes the Child record specified by the ChildId input parameter. SP0410_DeleteParent Deletes the Parent record specified by the ParentId input parameter. SP0410_DeleteParentChild Deletes the ParentChild record specified by the ParentId and ChildId input parameters. SP0410_GetChild Gets the Child record corresponding to the ChildId specified or returns all Child records if no ChildId is specified. SP0410_GetParent Gets the Parent record corresponding to the ParentId specified or returns all Parent records if no ParentId is specified. SP0410_GetParentChild Gets the ParentChild records corresponding to the ParentId specified or returns all ParentChild records if no ParentId is specified. SP0410_InsertChild Adds a new Child record. The stored procedure returns the ChildId value .