重载决议失败答案

【问题标题】：overload resolution failed重载决议失败
【发布时间】：2015-02-06 16:22:30
【问题描述】：

我正在尝试使用以下 LINQ 语句来查询数据库，但我一直收到错误提示

重载解析失败，因为无法调用 Where 可访问用这些论点。

谁能告诉我我做错了什么，因为我整天都在把头发拉出来。

Return context.Logins _
.Include("Account.Children") _
.Include("aspnet_Membership") _
.Include("AccountType") _
.AsQueryable() _
.Where(Function(l) Not l.aspnet_Membership.Deleted AndAlso(l.FirstName.Contains(searchTerm) OrElse l.LastName.Contains(searchTerm) OrElse l.aspnet_Membership.Email.Contains(searchTerm) OrElse (1.FirstName & " " & 1.LastName).Contains(searchTerm) OrElse l.Account.Children.Any(Function(c) (c.FirstName & " " & c.LastName).Contains(searchTerm)))) _
                            .OrderBy(sortField) _
                            .ToList()

【问题讨论】：

不确定这是否只是一个错字/相关但你有 1.FirstName 而不是 l.firstname

标签： vb.net entity-framework linq

【解决方案1】：

建议的修复方法（将 '1' 更改为 'l'）：

Return context.Logins _
.Include("Account.Children") _
.Include("aspnet_Membership") _
.Include("AccountType") _
.AsQueryable() _
.Where(Function(l) Not l.aspnet_Membership.Deleted AndAlso(l.FirstName.Contains(searchTerm) OrElse l.LastName.Contains(searchTerm) OrElse l.aspnet_Membership.Email.Contains(searchTerm) OrElse (l.FirstName & " " & l.LastName).Contains(searchTerm) OrElse l.Account.Children.Any(Function(c) (c.FirstName & " " & c.LastName).Contains(searchTerm)))) _
.OrderBy(sortField) _
.ToList()

【讨论】：