The Provider could not be resolved. You must explicitly set the Provider.

[CRC32EX]

Steps to reproduce this issue

1. Write code

Test.csproj

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>netcoreapp3.1</TargetFramework>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="MySqlConnector" Version="1.0.0" />
    <PackageReference Include="Z.Dapper.Plus" Version="3.0.17" />
  </ItemGroup>

</Project>

Program.cs

using MySqlConnector;
using Z.Dapper.Plus;
using System;
using System.ComponentModel.DataAnnotations.Schema;
using System.Collections.Generic;

namespace DapperPlusTest
{
  [Table("users")]
  class User
  {
    [Column("id")]
    public ulong Id { get; set; }

    [Column("name")]
    public string Name { get; set; }
  }

  class Program
  {
    const string Connstr = "userid=root;password=MYPASSWORD;database=MYDB;Host=127.0.0.1;";

    static MySqlConnection Connect()
    {
      var conn = new MySqlConnection(Connstr);
      conn.Open();
      return conn;
    }

    static void Main()
    {
      using var conn = Connect();

      var users = new List<User>
      {
        new User{ Id = 1, Name = "name001" },
        new User{ Id = 2, Name = "name002" },
        new User{ Id = 3, Name = "name003" },
      };

      conn.BulkInsert(users);
    }
  }
}

2. Run

   dotnet run

3. Got error

   Unhandled exception. System.Exception: The Provider could not be resolved. You must explicitly set the Provider.
   at Z.BulkOperations.BulkOperation.()
   at Z.BulkOperations.BulkOperation.Execute()
   at Z.BulkOperations.BulkOperation.BulkInsert()
   at Z.Dapper.Plus.DapperPlusAction.Execute()
   at Z.Dapper.Plus.DapperPlusActionSet`1.AddAction(String mapperKey, DapperPlusActionKind actionKind, TEntity item)
   at Z.Dapper.Plus.DapperPlusActionSet`1.DapperPlusActionSetBuilder(DapperPlusContext context, IDbConnection connection, IDbTransaction transaction, String mapperKey, DapperPlusActionKind actionKind, TEntity item, Func`2[] selectors)
   at Z.Dapper.Plus.DapperPlusActionSet`1..ctor(DapperPlusContext context, IDbConnection connection, String mapperKey, DapperPlusActionKind actionKind, TEntity item, Func`2[] selectors)
   at Z.Dapper.Plus.DapperPlusExtensions.BulkInsert[T](IDbConnection connection, String mapperKey, T item, Func`2[] selectors)
   at Z.Dapper.Plus.DapperPlusExtensions.BulkInsert[T](IDbConnection connection, T item, Func`2[] selectors)
   at DapperPlusTest.Program.Main() in D:\Programs\VC\DapperPlusTest\DapperPlusTest\Program.cs:line 41

Possible solution

Use MySqlConnector 0.69.8 instead of MySqlConnector 1.0.0

My Environment

OS	Windows 10 Pro 2004 64bit
dotnet	3.1.302
MariaDB	10.2.12-MariaDB

[JonathanMagnan]

Hello @CRC32EX ,

We do not support yet MySqlConnector, that's why this error is thrown, We currently support MySql.Data and DevArt,

We will try to look to support it next week to see if that's possible or not.

Best Regards,

Jon

[JonathanMagnan]

Hello @CRC32EX ,

The v3.0.18 has been released.

Could you try it and let us know if everything is working with MySqlConnector? We made our test with v1.0.0 but since we have no reference it should not matter.

[CRC32EX]

Everything works well. Thank you😊