Dapper Plus is a library that dramatically improves dapper performances by using high efficient Bulk Actions Helpers (Insert, Update, Delete, and Merge).

People using this library often report performance enhancement by 50x times and more!

The library is installed through NuGet. Extension methods are added automatically to your IDbConnection interface.

It can be used with or without Dapper, and it’s compatible with all others Dapper packages.


// CONFIGURE & MAP entity
DapperPlusManager.Entity<Order>().Table("Orders").Identity(x => x.ID);

// CHAIN & SAVE entity
.AlsoInsert(order => order.Items);
.Include(order => order.ThenMerge(order => order.Invoice)
.AsloMerge(invoice => invoice.Items))
.AlsoMerge(order => order.ShippingAddress);


Dapper Plus Mapper allow to map the conceptual model (Entity) with the storage model (Database) and configure options to perform Bulk Actions.

Mapper Examples

.Identity(x => x.ID)

Bulk Actions

Bulk Actions allow to perform a bulk insert, update, delete or merge and include related child items.

Bulk Actions Available:

Bulk Actions Examples

connection.BulkInsert(orders, order => order.Items)
.BulkInsert(invoices, invoice => invoice.Items)

Performance Comparisons

Operations 1,000 Rows 10,000 Rows 100,000 Rows 1,000,000 Rows
Insert 9 ms 25 ms 200 ms 2,000 ms
Update 50 ms 80 ms 575 ms 6,500 ms
Delete 45 ms 70 ms 625 ms 6,800 ms
Merge 65 ms 160 ms 1,200 ms 12,000 ms

Also Bulk Actions

Also Bulk Actions allow to perform bulk action with a lambda expression using entities from the last Bulk[Action] or ThenBulk[Action] used.

Also Bulk Actions Examples

.AlsoInsert(order => order.Items)
.AlsoInsert(order => order.Invoice)
.AlsoInsert(order => order.Invoice.Items);

Then Bulk Actions

Then Bulk Actions is similar to Also Bulk Actions but modify entities used for the next bulk action using a lambda expression.

Then Bulk Actions Examples

.AlsoInsert(order => order.Items)
.ThenInsert(order => order.Invoice)
.ThenInsert(invoice => invoice.Items);

Include Actions

The Dapper Plus Include method allow resolving issues with multiple “ThenBulk[Action]” method.

Include Actions Examples

.Include(x => x.ThenInsert(order => order.Items)
.ThenInsert(orderItem => orderItem.Metas))
.Include(x => x.ThenInsert(order => order.Invoice)
.ThenInsert(Invoice => invoice.Items));