In advance of using Dapper inside our task, we have to get ready a database and produce a new World wide web API undertaking. So, let’s start with the database.
After the course development, we will register it to be a singleton assistance while in the Startup class, if you are using .NET5:
We’ll demonstrate ways to use dynamic parameters in the following instance, wherever we’ll create a new Firm entity in our databases.
As soon as Dapper package deal is set up, we are able to execute database operations inside our .Web application. From the underneath code we have been inserting a file into a database desk with Dapper.
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QuerySingleOrDefault – executes a query and maps The end result or maybe a default price In case the sequence is vacant. It throws an exception if there is more than one factor in the sequence
In this article, we create a variable that contains a procedure identify along with a dynamic parameter object with one parameter within. Because our stored treatment returns a worth, we utilize the QueryFirstOrDefaultAsync approach to execute it.
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With this selection all is needed is usually that anonymous item’s fields have the very same name on the used parameters. You should utilize the “@” sign also in the sector identify If you would like or you could omit it provided that, yet again, the identify matches the parameter you need to assign the worth to.
Should the focus on object is specified (“User” in the above mentioned sample), mapping is completed by matching the names of returned columns with object Attributes names.
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It is amongst the swiftest and simplest all around, but it is very extensible and, earlier mentioned all, properly adopted and Utilized in very significant-efficiency Web-sites. A lot more specially continues to be formulated and is taken care of by the fellows behind StackOverflow, so that you can make certain it is battle-examined. Supply code is on GitHub
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Right here, we build our query along with a dynamic parameters item (we are not applying an anonymous item anymore). We populate that item with our three parameters and afterwards get in touch with the ExecuteAsync method to dapper tutorial for beginners execute our insert assertion.
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