Then Bulk Delete

Definition

The Dapper Plus ThenBulkDelete method allow to DELETE entities in a database table or a view using a lambda expression.

The lambda expression use the entity or the IEnumerable from the last Bulk[Action] or ThenBulk[Action] chained method. (The action can be an insert, update, delete or merge operation).

Then Bulk Delete with “One to One” Relation

The Dapper Plus ThenBulkDelete method allow deleting a related item with a “One to One” relation.

Example

//Delete an order and then the related invoice.
connection.BulkDelete(orderTransaction)
.ThenBulkDelete(transaction => transaction.order)
.ThenBulkDelete(order => order.Invoice);

//Delete a list of orders and then the related invoice to every order.
connection.BulkDelete(orderTransaction)
.ThenBulkDelete(transaction => transaction.orders)
.ThenBulkDelete(order => order.Invoice);

Then Bulk Delete with “One to Many” Relation

The Dapper Plus ThenBulkDelete method allow deleting related items with a “One to Many” relation.

Example

//Delete an order and then all related items.
connection.BulkDelete(orderTransaction)
.ThenBulkDelete(transaction => transaction.order)
.ThenBulkDelete(order => order.Items);

//Delete a list of orders and then all related items to every order.
connection.BulkDelete(orderTransaction)
.ThenBulkDelete(transaction => transaction.orders);
.ThenBulkDelete(order => order.Items);

Then Bulk Delete Chaining

The Dapper Plus ThenBulkDelete method allow chaining multiple bulk action methods.

Example

//Delete an order and then all related items. Delete an invoice and then all related items.
connection.BulkDelete(orderTransaction)
.ThenBulkDelete(transaction => transaction.order)
.ThenBulkDelete(order => order.Items)
.BulkDelete(invoiceTransaction)
.ThenBulkDelete(transaction => transaction.invoice)
.ThenBulkDelete(invoice => invoice.Items);

//Delete a list of orders and then all related items to every order. Delete a list of invoices and
//then all related items to every invoice.
connection.BulkDelete(orderTransaction)
.ThenBulkDelete(transaction => transaction.orders)
.ThenBulkDelete(order => order.Items)
.BulkDelete(invoiceTransaction)
.ThenBulkDelete(transaction => transaction.invoices)
.ThenBulkDelete(invoice => invoice.Items);