如何从VB.Net 3.5中的对象列表创建连接字符串

Question

我想我应该使用'聚合'，但显然我错了

首先，我获得了一个实体对象列表

    Dim employers As List(Of myEntity) = (New XXXX()).getZZZ(userName, userType)

然后我认为这是一种将所有名字放在字符串中的方法

    Dim names as String = employers.Aggregate(Function(current, [next]) current.Name & " " & [next].Name)

但我得到错误：“无法将类型'lambda表达式'转换为参数类型'System.Func（myEntity，myEntity，myEntity ......”

任何线索？

Answer 1

请改为尝试：

Dim names = String.Join(" ", employers.Select(Function(employer) employer.Name))

Answer 2

Dim names as String = employers.Aggregate("", Function(current, [next]) current & " " & [next].Name)
' Use this                                ^^                                  ^^

您可能希望之后修剪字符串，因为它将以空格开头。

Answer 3

尝试：

Dim names as String = employers.Select(Function(emp) emp.Name ).Aggregate(Function(current, [next]) current & " " & [next])