dapper

问题 This question is meant to bring some light around control date times using Dapper . These controls are used to audit the information in a data storage and figure out when a particular row has been created / updated. I couldn't manage to find any information on GitHub's project, either here in StackOverflow, so I would like this post to become a central source of truth to help others or even to turn into a future extension of the library. Any answer, resource or best practice will be

问题 For a new project which has to target Linux and Windows, I am searching for a solution to support MySQL (or MariaDB). Because we have to support those different platforms I wish to work on DNX Core5.0. However I can't find any nuget packages / connectors which I can use to connect to the database. the one that i find are not supported by DNX core 5.0. Is there a way to connect to mysql in DNX core 5.0 ? Or do you have to fall back on ODBC connections, i don't know if this would work...

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 have a PL/SQL procedure that using 3 variables of RECORD type as parameters, which i have to fill with my data (from c# application) to execute a procedure. 1st i've tried to build the same structure with this records via c# and pass as a parameter via Dapper, but it's not working since dapper works only with scalar data types. Then i've tried to pass my data as arrays and to map them inside the procedure, but RECORD type can't accept sets of data like a.NAME := ('aaaaaa','sdasd'); it works

问题 I have this query: const string query = @" select * from [Users] u left join [UserRoles] ur on [ur].[UserId] = [u].[UserId] left join [Roles] r on [r].[RoleId] = [ur].[RoleId] left join [ExternalLogins] el on [el].[UserId] = [u].[UserId]; "; and next class structure: public sealed class User : IUser<string> { public string Id { get { return this.UserId.ToString(); } } public Guid UserId { get; set; } public string PasswordHash { get; set; } public string SecurityStamp { get; set; } public

问题 Is it possible do do the following? I tried, but when it got to the Query, it just said there was a null reference. var builder = new StringBuilder("select * from my table1 where 1 = 1"); if(x==1) builder.Append(" and x = @x"); if(y==2) builder.Append(" and y = @y"); // when it gets here, it just says null reference db.Query<table1>(builder.ToString(), new {x,y}); I got SqlBuilder to run in .net 3.5, but when I do this: var builder = new SqlBuilder(); var sql = builder.AddTemplate("select *

问题 I have a dictionary like the following: Dictionary<string,SP> dict; that contains a string and a SP object. I would like to do the following dict = conn.Query("SELECT routine_name,created,modified FROM PROCEDURES").toDictionary ( row => (string)row.Routine_Name, row => new SP (Name=row.Routine_Name,Created=row.created,Modified=row.modified)); The above code is not working. How can I create a SP object with the above information. I have a constructor that takes these three parameters. 回答1:

问题 I have a single table which expresses a possible parent child relationship between Categories. Root categories would not contain a ParentId value, rather null. I think it's also important to point out that it should construct N level of depth. For example consider the following Sql table. Category : Id | Name | ParentId Where ParentId is a relationship back to the Id column of the same table. Trying to understand if it would be possible to populate the following class? public class Category {