从表格中返回值？ [英] Return Values From Form?

问题描述

您好，


我有一个Windows窗体应用程序（VS2005），我需要在

之后执行...


1.使用主窗体启动。

2.让用户选择一个文件，然后调出第二张表格

modally（Form1。 ShowDialog（））以便用户可以自定义

选项。

3.我可以将第二种形式的选项存储在许多不同的
$ b $中b方式，但是一旦模态形式

关闭，我必须让它们回到主窗体。选项是列标题名称，现在我是

选择将它们存储在通用列表< string>中。


到目前为止我做得很好，但是现在我需要找出最好的方法，一旦用户点击

继续，

将选择返回到主窗体。我在第二个表单上调用this.Close（）。


我想创建列表然后将引用传递给

模态表单'' s构造函数：" ref List< stringMyList"。但这并不是
工作，因为列表的范围不是模态形式的'

构造函数。因此，当其他事件发生时，我无法与其进行交互

在表单上，​​例如按钮点击。


另一种方式是创建和修改第二种形式的清单

然后简单地返回它，但据我所知，使用表格时不能这样做

（普通旧函数不会有问题）。

没有返回（MyList ）关闭表格时会有效吗？

对吧？


解决这个问题的好方法是什么？

Hello,

I have a windows forms application (VS2005) where I need to do the
following...

1. Startup with a main form.
2. Have the user to select a file and then bring up a second form
modally (Form1.ShowDialog()) so that the user can make custom
selections.
3. I can store the selections from the second form in many different
ways, but I have to get them back to the main form once the modal form
is closed. The selections are column header names, and right now I am
choosing to store them in a Generic List<string>.

I am doing fine so far, but now I need to figure out the best way to
get the selections back to the main form, once the user clicks
"Continue" and I call this.Close() on the second form.

I thought about creating the list and then passing a reference to the
modal form''s constructor: "ref List<stringMyList". But this doesn''t
work because the list is not scoped outside of the modal form''s
constructor. And so I cannot interact with it when other events occur
on the form, like for example, a button click.

Another way would be create and modify the list within the second form
and then simply "return" it, but as far as I know one cannot do that
when using forms (would not be a problem with plain old functions).
There is not a return(MyList) that will work when closing a form,
right?

What would be a good way to tackle this?

推荐答案

Joey，


为什么不在表单上公开一个会暴露
$ b $的属性b选择的格式是否易于使用？表单

引用仍然有效，您仍然可以访问

表格中公开的属性。


希望这有助于。


-

- Nicholas Paldino [.NET / C＃MVP]

- mv*@spam.guard.caspershouse.com


< jo ********* @ topscene.com写了留言

新闻：11 ********************* @ 75g2000cwc.googlegrou ps.com ...

Joey,

Why not just expose a property on your form that will expose the
selections in a format that is easy for you to work with? The form
reference is still valid, and you can still access the properties exposed on
your form.

Hope this helps.

--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard.caspershouse.com

<jo*********@topscene.comwrote in message
news:11*********************@75g2000cwc.googlegrou ps.com...

您好，


我有一个Windows窗体应用程序（VS2005），我需要在那里做

以下...


1.使用主表单启动。

2.让用户选择一个文件，然后调出第二个表单

modally（Form1.ShowDialog（））以便用户可以自定义

选项。

3.我可以存储第二种形式的选择在许多不同的方式，但我必须让他们回到主要形式一旦莫代尔形式

已关闭。选项是列标题名称，现在我是

选择将它们存储在通用列表< string>中。


到目前为止我做得很好，但是现在我需要找出最好的方法，一旦用户点击

继续，

将选择返回到主窗体。我在第二个表单上调用this.Close（）。


我想创建列表然后将引用传递给

模态表单'' s构造函数：" ref List< stringMyList"。但这并不是
工作，因为列表的范围不是模态形式的'

构造函数。因此，当其他事件发生时，我无法与其进行交互

在表单上，​​例如按钮点击。


另一种方式是创建和修改第二种形式的清单

然后简单地返回它，但据我所知，使用表格时不能这样做

（普通旧函数不会有问题）。

没有返回（MyList ）关闭表格时会有效吗？

对吗？


解决这个问题的好办法是什么？

Hello,

I have a windows forms application (VS2005) where I need to do the
following...

1. Startup with a main form.
2. Have the user to select a file and then bring up a second form
modally (Form1.ShowDialog()) so that the user can make custom
selections.
3. I can store the selections from the second form in many different
ways, but I have to get them back to the main form once the modal form
is closed. The selections are column header names, and right now I am
choosing to store them in a Generic List<string>.

I am doing fine so far, but now I need to figure out the best way to
get the selections back to the main form, once the user clicks
"Continue" and I call this.Close() on the second form.

I thought about creating the list and then passing a reference to the
modal form''s constructor: "ref List<stringMyList". But this doesn''t
work because the list is not scoped outside of the modal form''s
constructor. And so I cannot interact with it when other events occur
on the form, like for example, a button click.

Another way would be create and modify the list within the second form
and then simply "return" it, but as far as I know one cannot do that
when using forms (would not be a problem with plain old functions).
There is not a return(MyList) that will work when closing a form,
right?

What would be a good way to tackle this?

你能解释一下吗？


Nicholas Paldino [.NET / C＃MVP]写道：

Could you explain a little more?

Nicholas Paldino [.NET/C# MVP] wrote:

Joey，


为什么不在表单上公开一个属性，以一种格式公开

选项你很容易合作吗？表单

引用仍然有效，您仍然可以访问

表格中公开的属性。


希望这有助于。


-

- Nicholas Paldino [.NET / C＃MVP]

- mv*@spam.guard.caspershouse.com


< jo ********* @ topscene.com写了留言

新闻：11 ********************* @ 75g2000cwc.googlegrou ps.com ...

Joey,

Why not just expose a property on your form that will expose the
selections in a format that is easy for you to work with? The form
reference is still valid, and you can still access the properties exposed on
your form.

Hope this helps.

--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard.caspershouse.com

<jo*********@topscene.comwrote in message
news:11*********************@75g2000cwc.googlegrou ps.com...

您好，


我有一个Windows窗体应用程序（VS2005），我需要在那里做

以下...


1.使用主表单启动。

2.让用户选择一个文件，然后调出第二个表单

modally（Form1.ShowDialog（））以便用户可以自定义

选项。

3.我可以存储第二种形式的选择在许多不同的方式，但我必须让他们回到主要形式一旦模态形式

关闭。选项是列标题名称，现在我是

选择将它们存储在通用列表< string>中。


到目前为止我做得很好，但是现在我需要找出最好的方法，一旦用户点击

继续，

将选择返回到主窗体。我在第二个表单上调用this.Close（）。


我想创建列表然后将引用传递给

模态表单'' s构造函数：" ref List< stringMyList"。但这并不是
工作，因为列表的范围不是模态形式的'

构造函数。因此，当其他事件发生时，我无法与其进行交互

在表单上，​​例如按钮点击。


另一种方式是创建和修改第二种形式的清单

然后简单地返回它，但据我所知，使用表格时不能这样做

（普通旧函数不会有问题）。

没有返回（MyList ）关闭表格时会有效，

对吧？


解决这个问题的好办法是什么？

Hello,

I have a windows forms application (VS2005) where I need to do the
following...

1. Startup with a main form.
2. Have the user to select a file and then bring up a second form
modally (Form1.ShowDialog()) so that the user can make custom
selections.
3. I can store the selections from the second form in many different
ways, but I have to get them back to the main form once the modal form
is closed. The selections are column header names, and right now I am
choosing to store them in a Generic List<string>.

I am doing fine so far, but now I need to figure out the best way to
get the selections back to the main form, once the user clicks
"Continue" and I call this.Close() on the second form.

I thought about creating the list and then passing a reference to the
modal form''s constructor: "ref List<stringMyList". But this doesn''t
work because the list is not scoped outside of the modal form''s
constructor. And so I cannot interact with it when other events occur
on the form, like for example, a button click.

Another way would be create and modify the list within the second form
and then simply "return" it, but as far as I know one cannot do that
when using forms (would not be a problem with plain old functions).
There is not a return(MyList) that will work when closing a form,
right?

What would be a good way to tackle this?

Joey，


表单是一个对象，就像其他任何东西一样。只需将您的类型定义为

公开您可以在ShowDialog返回后调用的属性/方法

将为您提供对话框中的值。

-

- Nicholas Paldino [.NET / C＃MVP]

- mv *@spam.guard.caspershouse.com


< jo ********* @ topscene.comwrote in message

新闻：11 ********************** @ 35g2000cwc.googlegro ups.com ...

Joey,

A form is an object, like anything else. Just define your type to
expose a property/method that you can call after ShowDialog returns which
will give you the values from the dialog.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard.caspershouse.com

<jo*********@topscene.comwrote in message
news:11**********************@35g2000cwc.googlegro ups.com...

你能解释一下吗？


Nicholas Paldino [.NET / C＃MVP]写道：

Could you explain a little more?

Nicholas Paldino [.NET/C# MVP] wrote:

> Joey，

为什么不在表单上公开一个属性，以便以易于使用的格式公开
选项？表格
参考仍然有效，您仍然可以访问表格上公开的财产。

希望这会有所帮助。
-
- Nicholas Paldino [.NET / C＃MVP]
- mv*@spam.guard.caspershouse。 com

< jo ********* @ topscene.com写了留言
新闻：11 ************ *********@75g2000cwc.googlegro ups.com ...

>Joey,

Why not just expose a property on your form that will expose the
selections in a format that is easy for you to work with? The form
reference is still valid, and you can still access the properties exposed
on
your form.

Hope this helps.

--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard.caspershouse.com

<jo*********@topscene.comwrote in message
news:11*********************@75g2000cwc.googlegro ups.com...

你好，


我有一个Windows窗体应用程序（VS2005），我需要在其中执行

以下...


1.使用主窗体启动。

2.让用户选择一个文件，然后调出第二个表格

modally（Form1.ShowDialog（）），这样用户就可以自定义

选择。

3.我可以用许多不同的

方式存储第二种形式的选项，但是我必须在模态形式后将它们恢复到主形式

已关闭。选项是列标题名称，现在我是

选择将它们存储在通用列表< string>中。


到目前为止我做得很好，但是现在我需要找出最好的方法，一旦用户点击

继续，

将选择返回到主窗体。我在第二个表单上调用this.Close（）。


我想创建列表然后将引用传递给

模态表单'' s构造函数：" ref List< stringMyList"。但这并不是
工作，因为列表的范围不是模态形式的'

构造函数。因此，当其他事件发生时，我无法与其进行交互

在表单上，​​例如按钮点击。


另一种方式是创建和修改第二种形式的清单

然后简单地返回它，但据我所知，使用表格时不能这样做

（普通旧函数不会有问题）。

没有返回（MyList ）关闭表格时会有效吗？

对吗？


解决这个问题的好办法是什么？

Hello,

I have a windows forms application (VS2005) where I need to do the
following...

1. Startup with a main form.
2. Have the user to select a file and then bring up a second form
modally (Form1.ShowDialog()) so that the user can make custom
selections.
3. I can store the selections from the second form in many different
ways, but I have to get them back to the main form once the modal form
is closed. The selections are column header names, and right now I am
choosing to store them in a Generic List<string>.

I am doing fine so far, but now I need to figure out the best way to
get the selections back to the main form, once the user clicks
"Continue" and I call this.Close() on the second form.

I thought about creating the list and then passing a reference to the
modal form''s constructor: "ref List<stringMyList". But this doesn''t
work because the list is not scoped outside of the modal form''s
constructor. And so I cannot interact with it when other events occur
on the form, like for example, a button click.

Another way would be create and modify the list within the second form
and then simply "return" it, but as far as I know one cannot do that
when using forms (would not be a problem with plain old functions).
There is not a return(MyList) that will work when closing a form,
right?

What would be a good way to tackle this?

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