LINQ to SQL：在多個表上插入表格

我有兩個表，RESTAURANT和HOURS，REST_ID作爲兩個表之間的鍵。當我到達第一行添加HOUR的代碼時，我收到一個錯誤。該錯誤要求創建對象的實例，但Intellisence允許我調用該表引用。下面是代碼的文檔片斷：LINQ to SQL：在多個表上插入表格

RESTAURANT addRest = new RESTAURANT(); 
    addRest.REST_NAME = r_name; 
    addRest.REST_STREET1 = r_street; 
    addRest.REST_PHONE = r_phone; 
    addRest.REST_WEBSITE = r_web; 
    addRest.REST_DESC = r_desc; 
    addRest.HOUR.HOURS_SUN = h_su; 
    addRest.HOUR.HOURS_MON = h_mo; 
    addRest.HOUR.HOURS_TUE = h_tu; 
    addRest.HOUR.HOURS_WED = h_we; 
    addRest.HOUR.HOURS_THU = h_th; 
    addRest.HOUR.HOURS_FRI = h_fr; 
    addRest.HOUR.HOURS_SAT = h_sa; 
    addRest.HOURReference.EntityKey = new EntityKey("FVTCEntities.HOURS", "HOURS", 1); 
    db.AddToRESTAURANTs(addRest); 
    db.SaveChanges();

來源

2011-08-05 Susan

HOUR是RESTAURANT內部包含的對象。您需要在設置屬性之前將其實例化（如典型的C＃對象）：

addRest.HOUR = new HOUR(); 
addRest.HOUR.HOURS_SUN = h_su; 
...

來源

2011-08-05 18:14:45

您尚未創建在你的餐廳一小時的對象，從而使導航屬性是null。

... 
addRest.REST_DESC = r_desc; 
addRest.HOUR = new HOUR(); 
addRest.HOUR.HOURS_SUN = h_su; 
...

來源

2011-08-05 18:14:43 StriplingWarrior

LINQ to SQL：在多個表上插入表格

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