The dapper tutorial for beginners Diaries

The dapper tutorial for beginners Diaries

Blog Article

This inserts a different document into the inventory table. In this article Now we have prepared all the codes in just 4 strains exhibiting the strength of Dapper.

Listed here’s a summary what you can be expecting for being returned by each strategy in case your query return no rows, a person row or several rows:

The above code is quite simple to understand, listed here We have now included a database link string to the variable called myCS. Future we have assigned a variable sql a databases insert query.

Dapper is a light-weight, high-functionality data accessibility Resource built through the Stack Overflow group. It offers a minimalist method of data accessibility layer in .

Execute – an extension technique that we use to execute a command a single or a number of periods and return the volume of afflicted rows

Considering that Dapper.Internet would not summary absent the database or offer automatic migrations, you'll need to manage your databases schema and handle schema adjustments manually.

We’ll explain to you just the repository method where by we employ transactions. All the rest is pretty very simple as we repeated the methods various periods in the following paragraphs:

I believe this technique exists mostly for making much easier to adopt Dapper in legacy codebases wherever rather than addressing strongly typed lists you have to cope with a DataReader, and refactoring to work with a typed checklist it is actually not possible. If that’s the case, then is the method for you personally. Since the title advise it just returns a IDataReader.

QueryFirstOrDefault – we use this technique to execute a query and map the primary final result or even a default price if the sequence has no elements

QuerySingle – an extension process that executes a question and maps The end result. It throws an exception if there is not dapper tutorial for beginners precisely a person component in the sequence

community int CustomerID get; set; public string FirstName get; established; community string LastName get; set; public string Electronic mail get; established;

Your browser isn’t supported any more. Update it to find the most effective YouTube experience and our latest attributes. Find out more

This process is sort of similar to the previous a person, but with a person exception mainly because we have been using the QuerySingleOrDefaultAsync technique here and supply an nameless object as the second argument.

Just one good characteristic that you've when working with anonymous objects as parameters is the chance to go an IEnumerable. This is helpful in case you really need to pass a list of values for use inside a IN construct: can just go an IEnumerable as parameter worth, as well as values might be mechanically expanded into a comma-divided list of values.

Be part of 8,200+ Engineers who subscribe to my newsletter! Every week, you are going to acquire a single sensible idea filled with ideal methods and genuine-globe illustrations that will help you expand like a developer.