VB.NET嵌套来自不同作用域的语句 [英] VB.NET Nested With statements from different scopes

问题描述

我想知道这是否可能.我有一个列表表(lstTable)，它的表单与我试图用公共结构(ELEM_DATA)的信息填写的表单相同.我知道嵌套语句可以在相同范围内工作，但是如何使用下面的示例2做到这一点:

I am wondering if this is possible. I have a List Table (lstTable) that is on the same form that I am trying to fill in with information from a public structure (ELEM_DATA). I understand nested with statements will work if it is within the same scope but how can I do this with example 2 below:

示例1:

With me.lstTable.Items(RECORD)
     .SubItems(1).text = ELEM_DATA(RECORD).name
     .SubItems(2).text = ELEM_DATA(RECORD).number
end with

示例2:

With me.lstTable.Items(RECORD)
     With ELEM_DATA(RECORD)
     .SubItems(1).text = .name
     .SubItems(2).text = .number
     end with
end with

我不知道是否有可能，或者只是简单地将(.name)更改为其他名称.

I didnt know if it is possible or if it would be as simple as changing (.name) to something else.

推荐答案

嵌套的语句工作正常(请参阅有关冲突的评论).不幸的是，您不能将内部构件与内部构件一起使用.但是，由于您的外部WITH是一种引用类型，因此您可以按照注释中的建议使用局部变量来别名"它.

Nested With statements work (see comment about conflicts). Unfortunately you can't use the outer members inside the inner with. But since your outer WITH is a refernce type you could use a local variable to "alias" it as you suggest in you comment.

Dim l = me.lstTable.Items(RECORD) ' requires 2008 and option infer
With ELEM_DATA(RECORD)
   l.SubItems(1).text = .name
End With

这里是显示嵌套WITH语句如何使用的链接.

Here's a link to show how nested WITH statements can used.

http://ideone.com/agjne

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