無法投型「NHibernate.Hql.Ast.HqlBitwiseAnd」的對象鍵入「NHibernate.Hql.Ast.HqlBooleanExpression」上

Question

我有下面的代碼段中，我發現了錯誤

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; 
    } 
} 

if語句我收到提示

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

Answer 1

什麼：

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; 
    } 
} 

檢查雙符號在您的查詢，就在where部分。