dapper tutorial for beginners Options

dapper tutorial for beginners Options

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The very first thing we are going to do is to make a new Dto folder, and within it, a brand new CompanyForCreationDto class that we are going to use for the Article ask for:

Right here’s a summary what you can assume to become returned by Each individual approach in the event that your query return no rows, just one row or numerous rows:

QueryMultiple – an extension approach that executes numerous queries inside the similar command and maps outcomes

Dynamic Parameters are In particular ideal for advanced stored method, in case you need cope with also a return worth:

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Async techniques. The 10 samples I’ve created demonstrates how the above mentioned methods can be used. Permit’s Check out them prior to fiddling with the sample code:

Right here, we make a variable that contains a procedure title and also a dynamic parameter object with just one parameter inside. Simply because our saved technique returns a value, we make use of the QueryFirstOrDefaultAsync system to execute it.

I imagine that this process exists generally for making easier to dapper tutorial for beginners adopt Dapper in legacy codebases wherever instead of managing strongly typed lists you may have to handle a DataReader, and refactoring to make use of a typed list it really is not possible. If that’s the case, then is the method for you personally. As being the title counsel it just returns a IDataReader.

So what will come about is, we define the interfaces for Repositories listed here, and implement these interfaces at Yet another layer which is associated with Details entry, within our circumstance, Dapper.

We’ll also make a straightforward repository layer to wrap the logic up in order to avoid employing Dapper queries instantly In the controller.

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Transactions are rather basic to work with with Dapper. We will execute it using the Dapper library (the a single we currently use) or the Dappr.Transaction library, which is identical matter as Dapper, just Along with the extended IDbConnection interface. In our case in point, we're going to use the Dapper library.

var sql = @"find * from autos in which Id = @id1; select * from automobiles exactly where Id = @id2; pick out * from cars and trucks exactly where Id = @id3";

This technique executes a question that doesn’t return any resultset. Its return value includes that variety of rows affected from the question. If your executed in fact generates a resultset, which will be discarded.

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