如何将 IQueryable转换为 IQueryable到列表？
刚刚学习 LINQ，我在测试项目中遇到了新手障碍。你能解释一下我做错了什么吗？
public List<ToDoListInfo> retrieveLists(int UserID)
{
//Integrate userid specification later - need to add listUser table first
IQueryable<ToDoListInfo> lists =
from l in db.ToDoLists
select new ToDoListInfo {
ListID = l.ListID,
ListName = l.ListName,
Order = l.Order,
Completed = l.Completed
};
return lists.ToList<ToDoListInfo>;
}
我收到一条错误消息，内容如下：
无法将方法组“ToList”转换为非委托类型 'System.Collections.Generic.List' 你打算 调用方法？
Just learning LINQ and i've come to a newbie roadblock in my test project. Can you explain what i'm doing wrong?
public List<ToDoListInfo> retrieveLists(int UserID)
{
//Integrate userid specification later - need to add listUser table first
IQueryable<ToDoListInfo> lists =
from l in db.ToDoLists
select new ToDoListInfo {
ListID = l.ListID,
ListName = l.ListName,
Order = l.Order,
Completed = l.Completed
};
return lists.ToList<ToDoListInfo>;
}
I'm getting an error saying the following:
Cannont convert method group 'ToList' to non-delegate type
'System.Collections.Generic.List' Do you intend to
invoke the method?
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您只需要括号：
lists.ToList(); 另外，您不必声明类型参数，即您可以使用以下内容并让类型系统推断类型参数：
lists.ToList();You just need parantheses:
lists.ToList<ToDoListInfo>();Also, you do not have to declare the type parameter, i.e. you could use the following and let the type-system infer the type parameter:
lists.ToList();您只是缺少 ToList 上的右括号，应该是：
或
You are just missing the closing brackets on ToList, should be:
or