.net没有收益我不知道该怎么办 [英] .net doesnt have a yield I dont know what to do

问题描述

我在转换此代码时遇到错误.请帮助，因为vb.net中没有yeild

Im getting an error converting this code. Please help cause in vb.net there is no yeild

Public Function GetRoomUsersNames() As IEnumerable(Of String)
            ExpireUsers(userChatRoomSessionTimeout)
            For Each key As Object In RoomUsers.Keys
               yield Return Me.RoomUsers(key.ToString()).UserName
            Next

        End Function

推荐答案

Yield是语法糖.在幕后，它返回一个IEnumerator实例，该实例处理回调到您的函数中.要进行惰性枚举，必须自己在VB中实现.

开始阅读的时间:立即在VB中使用迭代器 [ ^ ]

Yield is syntactic sugar. Behind the scenes it returns an IEnumerator instance that handles the callbacks into your function. To do the lazy enumeration, you have to implement it yourself in VB.

Time to start reading: Use Iterators in VB Now[^]

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