选项严格使用Ctype（发件人.... [英] Option Strict With Ctype(sender....

问题描述

你好，


我目前正在使用我们的一些aspx.vb

文件严格。我有一个函数，当一个datarepeater被绑定时，或者当选择了一个按钮时，或者在一个datarepeater上调用了一个函数。该函数接受一个

''sender''对象，根据

函数的运行方式，该对象可能属于不同类型。


在一个实例中，类型是System.Web.UI.WebControls.RepeaterItem，并且在

其他实例中，它是System.Web.UI.HtmlControls.HtmlTableCell。在我可以简单地使用sender.FindControl之前，我现在必须检查

''sender.GetType.ToString''值并使用if获取每个控件
基于此的
语句所以我可以将我的发送者对象转换为正确的类型。

这已经奏效但我不能不觉得必须有一个更容易和更整洁的

这样做的方式！


如果有人有任何建议他们会感激不尽。


非常感谢，


Carl Howarth

Hello there,

I am currently in the process of ''getting strict'' with some of our aspx.vb
files. I have a function that is called either when a datarepeater is bound
or when a button on the datareader is selected. The function accepts a
''sender'' object, which may be of a different type depending on how the
function is ran.

In one instance the type is "System.Web.UI.WebControls.RepeaterItem", and on
others it is "System.Web.UI.HtmlControls.HtmlTableCell". Where i could simply
use sender.FindControl previously, I now have to check the
''sender.GetType.ToString'' value and get each of the controls using if
statements based on this so I can cast my sender object to the correct type.
This has worked but I can''t help feeling there must be an easier and neater
way of doing this!

If anybody has any suggestions they''d be gratefully received.

Thanks very much,

Carl Howarth

推荐答案

不。你正在走上正轨。您可能希望使用DirectCast作为其更快的

等等。


-

最好的问候


无与伦比的Mr Newbie o？o

" Carl Howarth" <钙********* @ discussions.microsoft.com>在留言中写道

新闻：A6 ********************************** @ microsof t.com ...

Nope. You are on track. You may want to use DirectCast instead as its faster
amongst other things.

--
Best Regards

The Inimitable Mr Newbie o?o
"Carl Howarth" <Ca*********@discussions.microsoft.com> wrote in message
news:A6**********************************@microsof t.com...

你好，

我目前正在使用我们的一些aspx.vb
文件'严格'' 。我有一个函数，当一个datarepeater绑定
或选择了datareader上的一个按钮时调用。该函数接受一个
''sender''对象，根据
函数的运行方式，该对象可能属于不同类型。

在一个实例中，类型为 System.Web.UI.WebControls.RepeaterItem"和
在其他人身上是System.Web.UI.HtmlControls.HtmlTableCell。我可以在以前简单地使用sender.FindControl，我现在必须检查
''sender.GetType.ToString''值，并使用if
获取每个控件基于此的陈述，所以我可以将我的发送者对象转换为正确的
类型。
这已经奏效，但我不能不觉得必须有一个更容易和
的整洁器
这样做的方式！

如果有人有任何建议他们会感激不尽。

非常感谢，

Carl Howarth

Hello there,

I am currently in the process of ''getting strict'' with some of our aspx.vb
files. I have a function that is called either when a datarepeater is
bound
or when a button on the datareader is selected. The function accepts a
''sender'' object, which may be of a different type depending on how the
function is ran.

In one instance the type is "System.Web.UI.WebControls.RepeaterItem", and
on
others it is "System.Web.UI.HtmlControls.HtmlTableCell". Where i could
simply
use sender.FindControl previously, I now have to check the
''sender.GetType.ToString'' value and get each of the controls using if
statements based on this so I can cast my sender object to the correct
type.
This has worked but I can''t help feeling there must be an easier and
neater
way of doing this!

If anybody has any suggestions they''d be gratefully received.

Thanks very much,

Carl Howarth

Carl，


这取决于你需要在每个控件中访问的内容。

所有控件都有一个基本类型System.Web.UI.HtmlControls.HtmlControl

所有其他控件都继承自。


如果你只需要访问基本控件属性，如：ClientId to

确定点击了哪个控件然后你可以转换任何HtmlControl像

转发器或表单元格到HtmlControl并访问那些基础

属性。如果您需要访问特定于该类型的属性

of control，那么您需要按照自己的方式进行投射。


-

此致，


S. Justin Gengo，MCP

网站开发人员/程序员

www.aboutfortunate.com


混乱无序。 ;

Nietzsche

" Carl Howarth" <钙********* @ discussions.microsoft.com>在留言中写道

新闻：A6 ********************************** @ microsof t.com ...

Carl,

It depends on what you need to access in each control.

All the controls have a base type System.Web.UI.HtmlControls.HtmlControl
which all the other controls inherit from.

If you only need to acces base control properties like: ClientId to
determine which control was clicked then you can cast any HtmlControl like
the repeater or the table cell to a HtmlControl and access those base
properties. If you need to access properties that are specific to that type
of control then you need to cast as you are doing.

--
Sincerely,

S. Justin Gengo, MCP
Web Developer / Programmer

www.aboutfortunate.com

"Out of chaos comes order."
Nietzsche
"Carl Howarth" <Ca*********@discussions.microsoft.com> wrote in message
news:A6**********************************@microsof t.com...

你好，

我目前正在使用我们的一些aspx.vb
文件'严格'' 。我有一个函数，当一个datarepeater绑定
或选择了datareader上的一个按钮时调用。该函数接受一个
''sender''对象，根据
函数的运行方式，该对象可能属于不同类型。

在一个实例中，类型为 System.Web.UI.WebControls.RepeaterItem"和
在其他人身上是System.Web.UI.HtmlControls.HtmlTableCell。我可以在以前简单地使用sender.FindControl，我现在必须检查
''sender.GetType.ToString''值，并使用if
获取每个控件基于此的陈述，所以我可以将我的发送者对象转换为正确的
类型。
这已经奏效，但我不能不觉得必须有一个更容易和
的整洁器
这样做的方式！

如果有人有任何建议他们会感激不尽。

非常感谢，

Carl Howarth

Hello there,

I am currently in the process of ''getting strict'' with some of our aspx.vb
files. I have a function that is called either when a datarepeater is
bound
or when a button on the datareader is selected. The function accepts a
''sender'' object, which may be of a different type depending on how the
function is ran.

In one instance the type is "System.Web.UI.WebControls.RepeaterItem", and
on
others it is "System.Web.UI.HtmlControls.HtmlTableCell". Where i could
simply
use sender.FindControl previously, I now have to check the
''sender.GetType.ToString'' value and get each of the controls using if
statements based on this so I can cast my sender object to the correct
type.
This has worked but I can''t help feeling there must be an easier and
neater
way of doing this!

If anybody has any suggestions they''d be gratefully received.

Thanks very much,

Carl Howarth

我参加了Tech Ed 2003的一次会议，在那里每个人都被告知对于DirectCast非常感兴趣。在引擎盖下CType做了很多事情保护你的代码和DirectCast会导致问题。


-

真诚，


S. Justin Gengo，MCP

网站开发人员/程序员

www.aboutfortunate.com


混乱无序。

Nietzsche

Mr Newbie <他** @ now.com>在消息中写道

新闻：eW ************** @ TK2MSFTNGP12.phx.gbl ...

I attended a conference at Tech Ed 2003 where everyone was told to be very
leery of DirectCast. Under the hood CType does a lot of things that protect
your code and DirectCast can cause problems.

--
Sincerely,

S. Justin Gengo, MCP
Web Developer / Programmer

www.aboutfortunate.com

"Out of chaos comes order."
Nietzsche
"Mr Newbie" <he**@now.com> wrote in message
news:eW**************@TK2MSFTNGP12.phx.gbl...

没有。你正在走上正轨。您可能希望更快地使用DirectCast作为其中的其他内容。

-
最好的问候

独特的Mr Newbie o？o

" Carl Howarth" <钙********* @ discussions.microsoft.com>在消息中写道
新闻：A6 ********************************** @ microsof t.com。 ..

Nope. You are on track. You may want to use DirectCast instead as its
faster amongst other things.

--
Best Regards

The Inimitable Mr Newbie o?o
"Carl Howarth" <Ca*********@discussions.microsoft.com> wrote in message
news:A6**********************************@microsof t.com...

你好，

我目前正在使用我们的一些
aspx.vb
文件'严格'' 。我有一个函数，当一个datarepeater绑定
或选择了datareader上的一个按钮时调用。该函数接受一个
''sender''对象，根据
函数的运行方式，该对象可能属于不同类型。

在一个实例中，类型为 System.Web.UI.WebControls.RepeaterItem"和
在其他人身上是System.Web.UI.HtmlControls.HtmlTableCell。我可以在以前简单地使用sender.FindControl，我现在必须检查
''sender.GetType.ToString''值，并使用if
获取每个控件基于此的陈述，所以我可以将我的发送者对象转换为正确的
类型。
这已经奏效，但我不能不觉得必须有一个更容易和
的整洁器
这样做的方式！

如果有人有任何建议他们会感激不尽。

非常感谢，

Carl Howarth

Hello there,

I am currently in the process of ''getting strict'' with some of our
aspx.vb
files. I have a function that is called either when a datarepeater is
bound
or when a button on the datareader is selected. The function accepts a
''sender'' object, which may be of a different type depending on how the
function is ran.

In one instance the type is "System.Web.UI.WebControls.RepeaterItem", and
on
others it is "System.Web.UI.HtmlControls.HtmlTableCell". Where i could
simply
use sender.FindControl previously, I now have to check the
''sender.GetType.ToString'' value and get each of the controls using if
statements based on this so I can cast my sender object to the correct
type.
This has worked but I can''t help feeling there must be an easier and
neater
way of doing this!

If anybody has any suggestions they''d be gratefully received.

Thanks very much,

Carl Howarth

这篇关于选项严格使用Ctype（发件人....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！