NetCore + Mysql + EF:No coercion operator is defined between types 'System.Int16' and 'System.Boolean',

總結三種解決辦法：

1.Mysql升級到7

 

2.Nuget安裝Pomelo.EntityFrameworkCore.MySql 2.2.0替代MySql.Data.EntityFrameworkCore 8.0.16后正常.

  PS：如果使用Pomelo庫的SQL語句查詢Convert.ToDateTime(item["createtime"]).ToString("yyyy-MM-dd HH:mm:ss")會報Unable to cast object of type 'MySql.Data.Types.MySqlDateTime' to type 'System.IConvertible'.  要改成Convert.ToDateTime(item["dskuupdatetime"].ToString()).ToString("yyyy-MM-dd HH:mm:ss").

 

3.EF上下文添加轉換代碼

protected override void OnModelCreating(ModelBuilder builder)
{
            base.OnModelCreating(builder);

            foreach (var entityType in builder.Model.GetEntityTypes())
            {
                foreach (var property in entityType.GetProperties())
                {
                    if (property.ClrType == typeof(bool))
                    {
                        property.SetValueConverter(new BoolToIntConverter());
                    }
                }
            }
}

public class BoolToIntConverter : ValueConverter<bool, int>
    {
        public BoolToIntConverter( ConverterMappingHints mappingHints = null)
            : base(
                  v => Convert.ToInt32(v),
                  v => Convert.ToBoolean(v),
                  mappingHints)
        {
        }

        public static ValueConverterInfo DefaultInfo { get; }
            = new ValueConverterInfo(typeof(bool), typeof(int), i => new BoolToIntConverter(i.MappingHints));
    }

 

PS: Linq Any轉換失敗：

　　　　var isExist = db.MyDbTable.Any(o => o.Id == id);

　　　　//throw No coercion operator is defined between types 'System.Int16' and 'System.Boolean',

              要改成

              var isExist = db.MyDbTable.FirstOrDefault(o => o.Id == id) != null;

     對於Linq Any有其他解決辦法嗎？