dapper

问题 I am trying to use Dapper support my data access for my server app. My server app has another application that drops records into my database at a rate of 400 per minute. My app pulls them out in batches, processes them, and then deletes them from the database. Since data continues to flow into the database while I am processing, I don't have a good way to say delete from myTable where allProcessed = true . However, I do know the PK value of the rows to delete. So I want to do a delete from

问题 I am trying to use Dapper support my data access for my server app. My server app has another application that drops records into my database at a rate of 400 per minute. My app pulls them out in batches, processes them, and then deletes them from the database. Since data continues to flow into the database while I am processing, I don't have a good way to say delete from myTable where allProcessed = true . However, I do know the PK value of the rows to delete. So I want to do a delete from

问题 How to return image from Stored procedure using Dapper in C#? I have a stored procedure with multiple out's and a return value. I want to read the return type in C# PFB the Code and Stored procedure. Please suggest me how to resolve this. CREATE PROCEDURE procedure_Sessions @id nvarchar(80), @IsLocked bit OUTPUT, @LockAge int OUTPUT AS DECLARE @textptr AS varbinary(16) DECLARE @length AS int DECLARE @now AS datetime SET @now = GETUTCDATE() -- Update Query Begins not complete Query example --

问题 I have been using Dapper as my ORM for my .NET Core Web Api. When using Dapper to query a stored procedure from my database with one parameter, it works exactly as expected. When I add more than one parameter, it does not return anything back to my datamodel like it should. I suspect this has to do either with my syntax or the way I am structuring the query. The stored procedure I am using below works as expected when executed inside a SSMS query window. Here is my method containing the

问题 I want to split data into two separate models with DAPPER ORM in C#, From TeamId to Location between a column in one model and RowNumber to PageCount into another sperate model. 回答1: I believe what you are trying to simulate would be an object such as: public class Team { public int Id { get; set; } public string Name { get; set; } public Supervisor Supervisor { get; set; } public Location Location { get; set; } } You can actually achieve this with Dapper up to seven objects, basically what

问题 I want to split data into two separate models with DAPPER ORM in C#, From TeamId to Location between a column in one model and RowNumber to PageCount into another sperate model. 回答1: I believe what you are trying to simulate would be an object such as: public class Team { public int Id { get; set; } public string Name { get; set; } public Supervisor Supervisor { get; set; } public Location Location { get; set; } } You can actually achieve this with Dapper up to seven objects, basically what

问题 I am trying to connect to the Oracle Database and trying to execute a query. So below is my Model Class using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.ComponentModel.DataAnnotations.Schema; using System.ComponentModel.DataAnnotations; namespace TestAPI.Models { public class TestAPIModel { [Key] public int PRIO_CATEGORY_ID { get; set; } public int LANG_ID { get; set; } public System.DateTime REC_DATE { get; set; } public int REC_USER { get;

问题 What is the simplest way to check if record exists using the Dapper ORM? Do I really need to define POCO objects for a query where I only want to check if a record exists? 回答1: int id = ... var exists = conn.ExecuteScalar<bool>("select count(1) from Table where Id=@id", new {id}); should work... 回答2: I think this may have a tad less overhead as there's no function call or data type conversions: int id = ... var exists = connection.Query<object>( "SELECT 1 WHERE EXISTS (SELECT 1 FROM MyTable

问题 I just started playing around with Dapper. So far i love it. Does dapper not work with TransactionScope ? I noticed that even if i never call TransactionScope.Complete then my changes are still committed to the database. If TransactionScope isn't supported now is there any plans in the future to support it? If not then you have to use traditional transaction management (System.Transactions.Transaction)? Update: I just talked to Sam over Twitter. It should work. I'll update it tomorrow morning