c# - 无法将类型为 'NHibernate.Hql.Ast.HqlBitwiseAnd' 的对象转换为类型 'NHibernate.Hql.Ast.HqlBooleanExpression'

Question

我在以下代码段中遇到错误

using (var session = Database.OpenSession())
{
    var q = from x in session.Query<User>()
           where x.UserName == username & x.Password==EncodePassword(password)
            select x;
    if (q.Count() > 0)
     {
         result = true;
     }
}

在 if 语句中我遇到了错误

Unable to cast object of type 'NHibernate.Hql.Ast.HqlBitwiseAnd' to type 'NHibernate.Hql.Ast.HqlBooleanExpression'.

Answer 1

关于:

using (var session = Database.OpenSession())
{
    var q = from x in session.Query<User>()
           where x.UserName == username && x.Password==EncodePassword(password)
            select x;
    if (q.Count() > 0)
     {
         result = true;
     }
}

检查查询中的双符号，就在 where 部分。