On this area, we are going to create a easy repository pattern. We’ll make it simple simply because this post is about Dapper.
Listed here’s a summary what you can assume to be returned by Just about every technique just in case your query return no rows, a single row or multiple rows:
QueryMultiple – an extension strategy that executes multiple queries within the very same command and maps success
Processes incoming requests, manipulates information utilizing the design, and renders the final output with the watch.
We’ll use try out-catch blocks in Each individual action in our controller for the instance’s sake. But to prevent code repetition, we strongly suggest examining our World-wide Error Handling article.
QuerySingleOrDefault – executes a question and maps The end result or maybe a default value Should the sequence is empty. It throws an exception when there is more than one ingredient while in the sequence
Now it’s time to check our number of tutorials to make you understand Dapper and utilize it confidently within your .Web apps.
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QueryFirstOrDefault – we use this process to execute a question and map the first outcome or maybe a default benefit When the sequence is made up of no features
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Transactions are quite uncomplicated to employ with Dapper. We could execute it utilizing the Dapper library (the just one we by now use) or perhaps the Dappr.Transaction library, which is similar issue as Dapper, just Along with the extended IDbConnection interface. Inside our case in point, we're going to use the Dapper library.
If you wish to simulate an error and examination that no rows will be designed from the databases, you could toss an exception down below the await code line. You'll find no new rows in the Companies desk.
What's your practical experience with Dapper? Is it your goto Device in the projects or would you fairly use Entity Framework or another thing?
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