如何检查数字并输入文本框 [英] how to check for numeric and enter in text box

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问题描述

有没有办法检查文本框中的条目并确保它是

数字?


另外,我可以捕获回车键吗?并将其称为按钮点击事件?


对不起,如果这听起来很愚蠢,但我试图解决.Net中的

差异问题我之前的所有编程都是在VB6中完成的


谢谢

-

Tony

解决方案

" anthonymelillo" <无************ @ earthlink.net> schrieb

有没有办法检查文本框中的条目并确保它是数字?

另外,我可以捕获回车键并制作它叫一个按钮点击事件



查看表格的Defaultbutton属性。

对不起,如果这听起来很愚蠢,但我正试图解决这个问题
.Net中的差异因为我以前的所有编程都是在VB6中完成的




我不想在输入时限制用户的输入。尝试使用

目标类型的(共享)Parse函数将

文本框''内容转换为数值。抓住发生的异常以确定转换是否成功。

-

Armin


" anthonymelillo" <无************ @ earthlink.net> scripsit:

有没有办法检查文本框中的条目并确保它是
数字?


您可以使用''Double.TryParse''或''IsNumeric''。

此外,我可以捕获回车键并将其调用为按钮点击事件?




创建一个按钮并将其分配给表单''''AcceptButton''属性。


-

Herfried K. Wagner

MVP·VB Classic,VB.NET

< http://www.mvps.org / dotnet>


尝试IdNumeric()函数....

如果IsNumeric那么

做一些很酷的事情

else

messageBox(非酷炫的错误)

结束如果


希望它能帮助

Armin Zingler < AZ ******* @ freenet.de>在消息中写道

news:el ************** @ tk2msftngp13.phx.gbl ...

" anthonymelillo" <无************ @ earthlink.net> schrieb

有没有办法检查文本框中的条目并确保它是数字?

另外,我可以捕获回车键并制作它调用一个按钮点击事件

看看Form的Defaultbutton属性。

对不起,如果这听起来很愚蠢,但我想来因为我以前的所有编程都是在VB6中完成的,所以.Net中的差异很大。



我打算在输入时不限制用户的输入。尝试使用



目标类型的(共享)Parse函数将
Textbox''内容转换为数值。抓住发生的异常以确定转换是否成功。

-
Armin



Is there any way to check the entry in a text box and make sure it is
numeric ?

Also, can I catch the enter key and make it call a button click event ?

Sorry if this sounds stupid, but I am trying to come to grips with the
differences in .Net since all my prior programming was done in VB6

Thanks
--
Tony

解决方案

"anthonymelillo" <no************@earthlink.net> schrieb

Is there any way to check the entry in a text box and make sure it
is numeric ?

Also, can I catch the enter key and make it call a button click event
?
Have a look at the Defaultbutton property of the Form.
Sorry if this sounds stupid, but I am trying to come to grips with
the differences in .Net since all my prior programming was done in
VB6



I prefer not to limit the user''s input when typing. Try to convert the
Textbox'' content to a numeric value using the (shared) Parse function of the
destination type. Catch occuring exceptions to find out if conversion was
successful.
--
Armin


"anthonymelillo" <no************@earthlink.net> scripsit:

Is there any way to check the entry in a text box and make sure it is
numeric ?
You can use ''Double.TryParse'' or ''IsNumeric''.
Also, can I catch the enter key and make it call a button click event ?



Create a button and assign it to the form''s ''AcceptButton'' property.

--
Herfried K. Wagner
MVP · VB Classic, VB.NET
<http://www.mvps.org/dotnet>


try the IdNumeric() function....
if IsNumeric then
do something cool
else
messageBox("So non-cool error")
end if

hope it helps
"Armin Zingler" <az*******@freenet.de> wrote in message
news:el**************@tk2msftngp13.phx.gbl...

"anthonymelillo" <no************@earthlink.net> schrieb

Is there any way to check the entry in a text box and make sure it
is numeric ?

Also, can I catch the enter key and make it call a button click event
?
Have a look at the Defaultbutton property of the Form.

Sorry if this sounds stupid, but I am trying to come to grips with
the differences in .Net since all my prior programming was done in
VB6



I prefer not to limit the user''s input when typing. Try to convert the
Textbox'' content to a numeric value using the (shared) Parse function of


the destination type. Catch occuring exceptions to find out if conversion was
successful.
--
Armin



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