micro-orm

问题 I've created the model using System.Data.Entity.Spatial; public class Store { public int Id { get; private set; } public string Name { get; set; } public string Address { get; set; } public DbGeography Location { get; set; } } Inserting to DB using (SqlConnection conn = SqlHelper.GetOpenConnection()) { const string sql = "INSERT INTO Stores(Name, Address, Location) " + "VALUES (@Name, @Address, @Location)"; return conn.Execute(sql, store); } i get the exception type System.Data.Entity.Spatial

问题 Let's say I have this User class: public class User { public int ID { get; set; } public string FirstName { get; set; } public string LastName { get; set; } public string Email { get; set; } public DateTime DateCreated { get; set; } public DateTime LastLogin { get; set; } } Which I want to map to the following table: CREATE TABLE "user" ( "ID" int(11) NOT NULL AUTO_INCREMENT, "FirstName" varchar(45) DEFAULT NULL, "LastName" varchar(45) DEFAULT NULL, "Email" varchar(255) NOT NULL, "DateCreated

问题 We decided to use a micro-orm against an Azure Database. As our business only needs "inserts" and "selects", we decided to suppress all code-managed SqlTransaction (no concurrency issues on data). Then, we noticed that our instance of Azure Database responded very slowly. The " rpc completed " event occured in delays that are hundreds times the time needed to run a simple sql statement. Next, we benchmarked our code with EF6 and we saw that the server responded very quickly. As EF6 implements

问题 We decided to use a micro-orm against an Azure Database. As our business only needs "inserts" and "selects", we decided to suppress all code-managed SqlTransaction (no concurrency issues on data). Then, we noticed that our instance of Azure Database responded very slowly. The " rpc completed " event occured in delays that are hundreds times the time needed to run a simple sql statement. Next, we benchmarked our code with EF6 and we saw that the server responded very quickly. As EF6 implements

问题 I am working on DB operations on one project and developing WinForms App C# and I am using Dapper to get data out of DB, I am stuck at situation where I need to retrieve data using inner join. Eg. I've two tables Authors and Book as Follow : public class Authors { public int AuthorId { get; set; } public string AuthorName { get; set; } } public class Book { public int BookId { get; set; } public string AuthorId { get; set; } public string Title { get; set; } public string Description { get;

问题 My work recently starting using PetaPoco and although fantastic I missed the feature from Dapper which allowed multiple result grids from a single query to be processed into pocos. As a result I wrote my own implementation for PetaPoco - shown below - but has anyone written their own and care to share it? I thought there might be others out there who have missed this feature. 回答1: Edit (2016-06-27): As of version 5.1.181 of PetaPoco (currently a beta at the time of writing) this feature is

问题 I am trying to update a row using Dapper but I am having error on specifying parameters in my update statement An exception of type 'System.InvalidOperationException' occurred in IBM.Data.DB2.iSeries.dll but was not handled in user code Additional information: Not enough parameters specified. The command requires 3 parameter(s), but only 0 parameter(s) exist in the parameter collection. Repository.cs public void Update(Movie movie) { var sql = "UPDATE myDB.movies set title=?, genre=? where Id

问题 I've found some related questions, but the author gave up and went ahead with using stored procedures to do the 'mapping'. This is actually a continuation question from here Model public class Store { public int Id { get; private set; } public string Name { get; set; } public string Address { get; set; } public DbGeography Location { get; set; } } Querying using (SqlConnection conn = SqlHelper.GetOpenConnection()) { const string sql = "Select * from Stores"; return conn.Query<Store>(sql, new

问题 I have a Customer class with the following properties: public int Id { get; set; } public string Name { get; set; } public int AddressId { get; set; } public Address Address { get; set; } My goal is to write a Dapper query that will use an Inner Join to populate the entire Address property within each Customer that is returned. Here is what I have and it is working but I am wondering if this is the cleanest/simplest way to do it: StringBuilder sql = new StringBuilder(); using (var conn =

问题 in ServiceStack OrmLite v3 you could do: var rows = db.Select<Employee>().Limit(10)); Or: var rows = db.Select<Employee>().Limit(5, 10)); // skips 5 then takes 10 However I cannot find these methods any longer in v4. I suppose I can do the following instead: var rows = db.SelectLazy<Employee>().Take(10); However how can I do a db.Select (not having to write direct SQL) which will translate to (in SQLite for example): SELECT * FROM Employee LIMIT 10; Also, is it possible to write an equivalent