dapper-contrib

问题 My class is like below: [Table("tblUser")] public class User { [Key] public int Id { get; set; } public string Title { get; set; } } Using Dapper.Contrib, is there a way to get the User record by Title instead of Id? If I query like below, it works. But, I want to filter on Title column which is not a key. await connection.GetAsync<User>(Id); 回答1: Looking at the documentation, Dapper.Contrib does not support retrieval of records using criteria other than key. In other words, it does not

问题 My class is like below: [Table("tblUser")] public class User { [Key] public int Id { get; set; } public string Title { get; set; } } Using Dapper.Contrib, is there a way to get the User record by Title instead of Id? If I query like below, it works. But, I want to filter on Title column which is not a key. await connection.GetAsync<User>(Id); 回答1: Looking at the documentation, Dapper.Contrib does not support retrieval of records using criteria other than key. In other words, it does not

问题 I have an object, assume public class User { [Key] int TheId { get; set; } string Name { get; set; } int Age { get; set; } } TheId is my auto increment column and Name is my unique key. When saving a user, I want to check its existence by: var user= connection.Get<User>("John"); But, because of my Key is not Name but TheId , I can't do this. If I set Name property as [KeyExplicit] that time when I want to save my user by: connection.Insert(myUser); This time, dapper expect TheId property

问题 I have the following challenge with this class: Public Class MyClass Property Id As Integer Property LastName as String End Class The corresponding data table in the database has as fields: Id (int, not null) Last-Name (nvarchar(80),null) So I need to map MyClass.LastName to MyClasses.Last-Name and have a hell of a time... When I write a custom Insert query it all works, but I would like to use the .Insert statement of one of the Dapper extensions packages. I tried Dapper.Contrib, but this

问题 I have the following challenge with this class: Public Class MyClass Property Id As Integer Property LastName as String End Class The corresponding data table in the database has as fields: Id (int, not null) Last-Name (nvarchar(80),null) So I need to map MyClass.LastName to MyClasses.Last-Name and have a hell of a time... When I write a custom Insert query it all works, but I would like to use the .Insert statement of one of the Dapper extensions packages. I tried Dapper.Contrib, but this

问题 I have a .Net Core 3.1 Console application. In SQL Server database I have tables with singular names, the same as my POCO classes, which is convenient for matching and maintaining. For Insert, Update and Delete operations I want to use Dapper.Contrib library. But when I run Insert function Dapper pluralize table names in generated SQL queries. SQL table "Student": CREATE TABLE Student StudentId int NOT NULL PRIMARY KEY, FirstName varchar(50), LastName varchar(50) C# code public class Student

问题 This resource explains how Computed excludes a property (in an update only?). Specifie the property should be excluded from update. [Table("Invoice")] public class InvoiceContrib { [Key] public int InvoiceID { get; set; } public string Code { get; set; } public InvoiceKind Kind { get; set; } [Write(false)] [Computed] public string FakeProperty { get; set; } } using (var connection = My.ConnectionFactory()) { connection.Open(); var invoices = connection.GetAll<InvoiceContrib>().ToList(); //

问题 On asp.net core application when i execute insert operating application throws error. previously application was asp.net core 1.1 recently i updated to asp.net core 2.0 using (var con = _connectionFactory.CreateConnection()) { con.Open(); using (var transaction = con.BeginTransaction()) { try { if (regions.Any()) { con.Insert(regions.Select(c => { c.UserId = userId; return c; }), transaction); } transaction.Commit(); } catch(Exception exception) { transaction.Rollback(); } } } exception was

问题 When trying to use Contrib's CRUD methods in an object where the properties are in an inherited object I get an Entity must have at least one [Key] or [ExplicitKey] property error. Here is a simplified version of my objects: public class BaseObject { public string Delete() { using (IDbConnection db = new SqlConnection(ConfigurationManager.ConnectionStrings["con"].ConnectionString)) { db.Delete(this); } } } and this public class Product: BaseObject { [Key] public int id { get; set; } public