dapper tutorial for beginners - An Overview

dapper tutorial for beginners - An Overview

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The first thing we're going to do is to create a new Dto folder, and inside of it, a different CompanyForCreationDto course that we're going to use for that Submit request:

Below’s a summary Anything you can anticipate being returned by Each and every approach in the event your question return no rows, one particular row or various rows:

The above code is quite simple to understand, below We've got extra a database link string to a variable named myCS. Up coming We've assigned a variable sql a databases insert query.

At the time Dapper deal is mounted, we have been wanting to conduct database operations in our .NET application. While in the underneath code we're inserting a report to some databases table with Dapper.

We’ll use consider-catch blocks in Every action in our controller for the instance’s sake. But to stay away from code repetition, we strongly advise looking through our Worldwide Error Handling article.

Web programs, specializing in raw efficiency while retaining the simplicity of one's code. Dapper extends the IDbConnection interface with additional techniques to carry out SQL instructions and question knowledge.

We’ll teach you just the repository method exactly where we put into action transactions. All the rest is fairly straightforward as we repeated the actions a number of occasions in this article:

I think that this method exists largely for generating simpler to adopt Dapper in legacy codebases where by as an alternative to coping with strongly typed lists you might have to manage a DataReader, and refactoring to utilize a typed listing it really is not possible. If that’s the case, then is the method for you personally. Since the title suggest it just returns a IDataReader.

QueryFirstOrDefault – we use this method to execute a question and map the very first final result or simply a default price if the sequence consists of no factors

In case the goal item has long been specified (“Consumer” in the above sample), mapping is done by matching the names of returned columns with object Homes names.

Concentrate that In case your saved procedure doesn’t return a price, you can use the ExecuteAsync system for execution.

The ExecuteAsync process returns int Consequently, symbolizing the volume of affected rows within the database. So, if you need that data, You should utilize it by accepting the return benefit from this method.

var sql = @"find * from vehicles wherever Id = @id1; select * from automobiles where by Id = @id2; choose * from automobiles where by Id = @id3";

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