我不断收到 InvalidProgramException 试图通过实体框架获取数据。
using (var db = new Entities())
{
var utrs = from u in db.users_to_roles
select u; // utrs.Count() > 1 at this point. So, there IS data!
users_to_roles utr = utrs.FirstOrDefault(); // InvalidProgramException!
utrs.GetEnumerator(); // InvalidProgramException!
utrs.ToList(); // InvalidProgramException!
}
表很简单:
CREATE TABLE `users_to_roles` (
`id` bigint(20) unsigned NOT NULL AUTO_INCREMENT,
`userid` bigint(20) NOT NULL,
`roleid` bigint(20) NOT NULL,
PRIMARY KEY (`id`),
KEY `fkuserid` (`userid`),
KEY `FK22FCE45052C7D0B5` (`roleid`),
)
其他表我没有这个问题。我错过了什么?
异常:System.InvalidProgramException - “公共语言运行时检测到无效程序。”
堆栈跟踪:
at System.Data.Entity.DynamicProxies.users_to_roles_026CF8D248576FA69379B3C621F372FAF9B6F2E4794C8490AE27BABE54609FF1.set_id(Decimal )
at lambda_method(Closure , Shaper )
at System.Data.Common.Internal.Materialization.Shaper.HandleEntityAppendOnly[TEntity](Func`2 constructEntityDelegate, EntityKey entityKey, EntitySet entitySet)
at lambda_method(Closure , Shaper )
at System.Data.Common.Internal.Materialization.Coordinator`1.ReadNextElement(Shaper shaper)
at System.Data.Common.Internal.Materialization.Shaper`1.SimpleEnumerator.MoveNext()
at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
at System.Linq.Queryable.FirstOrDefault[TSource](IQueryable`1 source)
at Users.Lib.DAOs.Mysql.MysqlUserDAO.RemoveRoleFromUser(String email, String roleName) in C:\Work\Users.Lib\DAOs\Mysql\MysqlUserDAO.cs:line 242
编辑
解决方案,感谢下面的@Quintin。我的实体中的“id”列被映射到十进制而不是 Int64。不知道它是怎么做到的,但问题已经解决了!