在LINQ to SQL中使用"Is NULL/not NULL"

Question

我想在LINQ to SQL中将此请求转换为:

SELECT * from Agir where NouvelIncident='1' AND facturable is null

我的尝试:

 public static List<Agir> GetINDEFAgir()
 {
     DataClassesActilogDataContext db = ContextSingleton.GetDataContext();

     List<Agir> list;

     var v = from i in db.Agir
             where i.facturable is null && i.NouvelIncident == true
             select i;

     list = v.ToList();
     return list;

 }

LINQ to SQL中似乎不允许"is null"...我有一个错误.

在此先感谢您的帮助

Answer 1

使用==,'is'是检查类型

public static List<Agir> GetINDEFAgir()
 {

 DataClassesActilogDataContext db = ContextSingleton.GetDataContext();

 List<Agir> list;

 var v = from i in db.Agir
         where i.facturable == null && i.NouvelIncident == true
         select i;

 list = v.ToList();
 return list;

 }