In the previous article below, I covered the performance benchmark between Dapper and Entity Framework Core. Dapper was much faster to insert records, and now I am curious if I can make it even faster using Microsoft SQL's Table Valued Parameter. Let me share with you what I found out using AdventureWorks Database.Dapper is a popular simple object mapping tool. It is designed primarily to be used in scenarios where you want to work with data in a strongly typed fashion - as business objects in a .NET application, but don't want to spend hours writing code to map query results from ADO.NET data readers to instances of those objects.
It was a really nice experience to read about ASP.NET Core with PostgreSQL and Dapper - CRUD Operations Example. provided information very useful for Students. You have explained all the information implement CRUD (Create, Read, Update and Delete) operations in ASP.NET MVC step by step in a very structured manner.
Dapper maps data to the first type in the same way as it does if only one generic parameter has been supplied to the QueryAsync<T> method. If is then told to map data to the Category type, and to assign the resulting object to the product's Category property.In terms of entities (or objects) you have a Class object which has a collection of Students and a Student object that has a collection of Classes.Since your StudentClass table only contains the Ids and no extra information, EF does not generate an entity for the joining table. That is the correct behaviour and that's what you expect. Now, when doing inserts or updates, try to think in terms ...
Provides fluent interface for mapping DataReaders to objects No DB specific implementation Works across SQL Server, SQLite, SQL CE, Firebird, Oracle, MySQL, and PostgresSQL
I've noticed "connection.Insert(myObject)" will update the "[key]" property of the "myObject" if I'm just inserting one object, but if I'm inserting a list of say 5 objects using the same "connection.Insert(myObjectList)" then none of the [keys] properties are updated, so I have to manually do foreach item in list and insert them one at a time.
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- A late answer, but here is an alternative to the SCOPE_IDENTITY() answers that we ended up using: OUTPUT INSERTED. Return only ID of inserted object: It allows you to get all or some attributes of the inserted row: string insertUserSql = @"INSERT INTO dbo.[User](Username, Phone, Email) OUTPUT INSERTED.[Id] VALUES(@Username, @Phone, @Email);"; int newUserId = conn.QuerySingle<int>(insertUserSql ...
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- declare @p1 dbo.AUDITRECORD insert into @p1 values (1,N ' EHLO', NULL) exec TestOne @[email protected] Quite clever. Because Dapper can be used with many database clients, instead of having to figure out how to exchange a TVP with every database, Dapper injects extra SQL code to allow for the exchange to occur, without having to define custom types on ...
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Introduction. Dapper is a .NET-based, light-weight, fast, and simple to use micro ORM created by the brilliant Stack Exchange team. The word ORM means Object Relation Mapper, which means it ...