Lambda表达式问题 [英] Lambda Expression Problem
问题描述
好的，我很累，而且我确定我知道这个问题的答案，但是我现在无法想出它来获得它。
什么是VB.NET相当于以下C＃代码？
/////////////
行动< FooClassmethod = x = x.FooSub（null）;
/////////////
其中''FooSub'是一个子（不是函数）因此没有返回
所以：
////// ///////
Dim方法As Action（Of FooClass）= Function（x as BikeClass）
x.FooSub（Nothing）
/////////////
不工作。
谢谢，
Seth Rowe [MVP]
http：// sethrowe .blogspot.com /
8月20日，1：52 * pm，rowe_newsgroups< rowe_em ... @ yahoo。 comwrote：
好的，我累了我确定我知道这个问题的答案，但我现在无法想出它来获得它。
什么是VB.NET相当于以下C＃代码？
/////////////
* *动作< FooClassmethod = x = x.FooSub（null）;
/////////////
其中''FooSub''是sub（不是函数）因此没有返回
所以：
/////////////
* * Dim方法As Action（Of FooClass）= Function（x as BikeClass）
x.FooSub（Nothing）
//// /////////
不工作。
谢谢，
Seth Rowe [MVP] http://sethrowe.blogspot.com/
小修正：
In第二个样本Function（x as BikeClass）应该是功能（x
As FooClass）。此代码用于VB.NET中的演示文稿，
示例代码代表一个虚构的自行车商店。
谢谢，
Seth Rowe [MVP]
http://sethrowe.blogspot.com/
Hi Seth，
不幸的是，VB目前还不支持多语句或无效返回
lambdas。但是，您可以将标准AddressOf与普通委托一起使用。
" rowe_newsgroups" < ro ******** @ yahoo.com写了留言
news：67 ********************** ************ @ a1g2000h sb.googlegroups.com ...
好的，我累了，我是确定我知道这个问题的答案，但我现在无法想象它是什么。
什么是VB.NET等价物以下C＃代码？
/////////////
行动< FooClassmethod = x = x.FooSub（null ）; $
/////////////
其中''FooSub'是子（不是函数）和所以没有返回
如此：
/////////////
Dim方法As Action（Of FooClass）= Function（x as BikeClass）
x.FooSub（Nothing）
/////////////
不工作。
谢谢，
Seth Rowe [MVP]
http://sethrowe.blogspot.com/
8月21日，1：44 * am，Bill McCarthy < B ... @ localhost.comwrote：
Hi Seth，
不幸的是VB目前还不支持多声明或无效返回
lambdas。 *但是，您可以将标准AddressOf与普通代表一起使用。
" rowe_newsgroups" < rowe_em ... @ yahoo.com写了留言
新闻：67 *********************** *********** @ a1g2000h sb.googlegroups.com ...
好的，我很累，我很确定我知道这个问题的答案，但我现在无法想出它。
什么是VB.NET等效于以下C＃代码？
/////////////
*行动< FooClassmethod = x = x。 FooSub（null）;
/////////////
Where''FooSub ''是一个子（不是函数）因此没有返回
所以：
// ///////////
* * Dim方法As Action（Of FooClass）= Function（x as BikeClass）
x.FooSub（Nothing）
/////////////
不行。
谢谢，
Seth Rowe [MVP]
http://sethrowe.blogspot.com/
感谢您的确认，这就是我所害怕的。
不幸的是，我不能做正常的事情。事情并使用代表，因为
这是第三方应用程序，不接受标准的
代表。
我最后刚刚将测试库转换为C＃，严格的VB-only
我工作的
开发人员将不得不忍受:-)
谢谢，
Seth Rowe [MVP]
http://sethrowe.blogspot.com/
Ok, I''m tired and I''m sure I know the answer to this, but I can''t seem
to come up with it right now.
What is the VB.NET equivalent to the following C# code?
/////////////
Action<FooClassmethod = x =x.FooSub(null);
/////////////
Where ''FooSub'' is a sub (not a function) and therefore doesn''t return
anything so:
/////////////
Dim method As Action(Of FooClass) = Function(x as BikeClass)
x.FooSub(Nothing)
/////////////
Won''t work.
Thanks,
Seth Rowe [MVP]
http://sethrowe.blogspot.com/解决方案On Aug 20, 1:52*pm, rowe_newsgroups <rowe_em...@yahoo.comwrote:Ok, I''m tired and I''m sure I know the answer to this, but I can''t seem
to come up with it right now.
What is the VB.NET equivalent to the following C# code?
/////////////
* *Action<FooClassmethod = x =x.FooSub(null);
/////////////
Where ''FooSub'' is a sub (not a function) and therefore doesn''t return
anything so:
/////////////
* * Dim method As Action(Of FooClass) = Function(x as BikeClass)
x.FooSub(Nothing)
/////////////
Won''t work.
Thanks,
Seth Rowe [MVP]http://sethrowe.blogspot.com/Minor correction:
In the second sample "Function(x as BikeClass)" should be "Function(x
As FooClass)". This code is for a presentation in VB.NET and the
sample code represents a fictional bike shop.
Thanks,
Seth Rowe [MVP]
http://sethrowe.blogspot.com/
Hi Seth,
Unfortunately VB doesn''t currently support multi statement or void returning
lambdas. You can however use the standard AddressOf with a normal delegate.
"rowe_newsgroups" <ro********@yahoo.comwrote in message
news:67**********************************@a1g2000h sb.googlegroups.com...Ok, I''m tired and I''m sure I know the answer to this, but I can''t seem
to come up with it right now.
What is the VB.NET equivalent to the following C# code?
/////////////
Action<FooClassmethod = x =x.FooSub(null);
/////////////
Where ''FooSub'' is a sub (not a function) and therefore doesn''t return
anything so:
/////////////
Dim method As Action(Of FooClass) = Function(x as BikeClass)
x.FooSub(Nothing)
/////////////
Won''t work.
Thanks,
Seth Rowe [MVP]
http://sethrowe.blogspot.com/
On Aug 21, 1:44*am, "Bill McCarthy" <B...@localhost.comwrote:Hi Seth,
Unfortunately VB doesn''t currently support multi statement or void returning
lambdas. *You can however use the standard AddressOf with a normal delegate.
"rowe_newsgroups" <rowe_em...@yahoo.comwrote in message
news:67**********************************@a1g2000h sb.googlegroups.com...
Ok, I''m tired and I''m sure I know the answer to this, but I can''t seem
to come up with it right now.
What is the VB.NET equivalent to the following C# code?
/////////////
* Action<FooClassmethod = x =x.FooSub(null);
/////////////
Where ''FooSub'' is a sub (not a function) and therefore doesn''t return
anything so:
/////////////
* *Dim method As Action(Of FooClass) = Function(x as BikeClass)
x.FooSub(Nothing)
/////////////
Won''t work.
Thanks,
Seth Rowe [MVP]
http://sethrowe.blogspot.com/
Thanks for the confirmation, that was what I was afraid of.
Unfortunately, I can''t do the "normal" thing and use a delegate, as
this is for a 3rd party application that won''t accept a standard
delegate.
I finally just converted the test library to C#, the strict VB-only
developers I work with will just have to suffer through :-)
Thanks,
Seth Rowe [MVP]
http://sethrowe.blogspot.com/
这篇关于Lambda表达式问题的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
