我嘗試做與實體框架加入,但我需要列出我的信息加入我正常的方法是這樣後:實體框架加入
public DataTable LoadAllAllowing()
{
var resultList = new DataTable();
SqlConnection connection = new SqlConnection(@"server=. ; database=PersonnelTrackingSystem;Trusted_Connection=yes");
connection.Open();
SqlDataAdapter da = new SqlDataAdapter(@"SELECT PA.personelId
,[allowedDatesId]
,[allowedStartDate]
,[allowedEndDate]
,[allowReason]
,PI.personnelNumber
,PI.personnelName
,PI.personnelSurname
FROM [PersonnelTrackingSystem].[dbo].[personnelAllowedDates] AS PA
JOIN PersonnelInformation AS PI ON PI.personelId=PA.personelId", connection);
da.Fill(resultList);
return resultList;
}
我怎麼能與實體框架做到這一點?我不喜歡這一點,但它不工作
public List<PersonnelInfoAndAllow> LoadAllAllowing()
{
PersonnelTrackingSystemEntities entity = new PersonnelTrackingSystemEntities();
//var personnel = entity.personnelAllowedDates.ToList();
var allows = (from allow in entity.personnelAllowedDates join personnel in entity.PersonnelInformation on allow.personelId equals personnel.personelId select new { personelId = personnel.personelId, personnelNumber = personnel.personnelNumber, personnelName = personnel.personnelName, personnelSurname = personnel.personnelSurname, allowedDatesId = allow.allowedDatesId, allowedStartDate = allow.allowedStartDate, allowedEndDate = allow.allowedEndDate, allowReason = allow.allowReason }).ToList();
List<PersonnelInfoAndAllow> personnels = allows;
return personnels;}
我寫的類這樣的:
namespace personnelTrackingSystem { class PersonnelInfoAndAllow { public int personelId { get; set; } public System.DateTime allowedStartDate { get; set; } public System.DateTime allowedEndDate { get; set; } public string allowReason { get; set; } public int allowedDatesId { get; set; } public string personnelNumber { get; set; } public string personnelName { get; set; } public string personnelSurname { get; set; } } }
但它不工作。我如何解決這個問題?
謝謝你,但我怎麼做我的方法是什麼?這個查詢必須是var,我的方法應該返回帶有這個變量的List。但是當我寫'List'時,它沒有PersonnelInformation信息。 –
Mualla
@Mualla - 你很親密。你應該定義一個新的類,比如'AnObjectDefinedByYou',它具有'personnelAllowedDates'和'PersonnelInformation'屬性;那麼你的方法應該返回一個'List'。 –
好的。我會嘗試 。非常感謝 。 – Mualla