dapper tutorial for beginners Options

dapper tutorial for beginners Options

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Generally speaking, you should want utilizing the above mentioned strategies instead of using the one Together with the exact same names within the IEnumerable. This is due to how Dapper operates guiding the scenes: by default the whole end result set is study in memory plus the returned being an IEnumerable. The reasoning at the rear of this habits is to help keep the connection for the databases open up to the minimum length of time possible, in order to favor concurrency with the database amount. Should you don’t such as this habits, keep in mind that it can be modified and we’ll focus on about that in long run.

We inject the IConfiguration interface to help usage of the relationship string from our appsettings.json file. Also, we produce the CreateConnection strategy, which returns a brand new SQLConnection object. For this to work, we should increase a number of employing statements:

The above code is very simple to grasp, below We've got included a databases relationship string to some variable called myCS. Subsequent Now we have assigned a variable sql a database insert query.

Dapper.NET nonetheless offers major pros, particularly in terms of functionality and Handle. Will investigate Dappet.NET in future articles generating an easy CRUD application and looking out at advantages and disadvantages of it.

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Given that Dapper.NET does not abstract absent the databases or supply automatic migrations, You'll have to deal with your database schema and tackle schema variations manually.

We’ll tell you about just the repository strategy where by we apply transactions. All the rest is really very simple as we recurring the ways numerous situations in the following paragraphs:

In a previous example, we utilized two SQL statements to return two outcomes after which be a part of them collectively in just one object. But usually, for such queries, we don’t want to write two SQL statements.

With this selection all is needed is the fact anonymous item’s fields have the very same identify in the made use of parameters. You should use the “@” indication also in the field title If you prefer or it is possible to omit it providing, once again, the identify matches the parameter you would like to assign the value to.

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Light-weight: Dapper is a light-weight library with small dependencies. It doesn’t impose any advanced configuration or set up, which makes it simple to integrate into your projects.

Transactions are very uncomplicated to implement with Dapper. We could execute it using the Dapper library (the a single we presently use) or the Dappr.Transaction dapper tutorial for beginners library, which is identical detail as Dapper, just Along with the extended IDbConnection interface. In our case in point, we're going to use the Dapper library.

In order to simulate an error and examination that no rows is going to be established while in the database, it is possible to throw an exception beneath the await code line. You can find no new rows in the Companies desk.

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