我有一个方法:
public DzieckoAndOpiekunCollection GetChildAndOpiekunByFirstnameLastname(string firstname, string lastname)
{
DataTransfer.ChargeInSchoolEntities db = new DataTransfer.ChargeInSchoolEntities();
DzieckoAndOpiekunCollection result = new DzieckoAndOpiekunCollection();
if (firstname == null && lastname != null)
{
IList<DzieckoAndOpiekun> resultV = from p in db.Dziecko
where lastname == p.Nazwisko
**select** new DzieckoAndOpiekun(
p.Imie,
p.Nazwisko,
p.Opiekun.Imie,
p.Opiekun.Nazwisko)
;
result.AddRange(resultV);
}
return result;
}
和在选定的地点错误:
错误1无法隐式转换类型'System.Linq.IQueryable'到'System.Collections.Generic.IList。一个显式转换存在(是否缺少强制转换?)
Error 1 Cannot implicitly convert type 'System.Linq.IQueryable' to 'System.Collections.Generic.IList'. An explicit conversion exists (are you missing a cast?)
不知道如何解决我的问题?
Any idea how solve my problem?
要转换 IQuerable
或的IEnumerable
到列表中,您可以执行下列操作之一:
To convert IQuerable
or IEnumerable
to a list, you can do one of the following:
IQueryable<object> q = ...;
List<object> l = q.ToList();
或
IQueryable<object> q = ...;
List<object> l = new List<object>(q);